These changes build upon the existing Android kernel wakeup reason code
to:
* improve the positioning of suspend abort logging calls in suspend flow
* add logging of abnormal wakeup reasons like unexpected HW IRQs and
IRQs configured as both wake-enabled and no-suspend
* add support for capturing deferred-processing threaded nested IRQs as
wakeup reasons rather than their synchronously-processed parents
Bug: 150970830
Bug: 140217217
Signed-off-by: Kelly Rossmoyer <krossmo@google.com>
Change-Id: I903b811a0fe11a605a25815c3a341668a23de700
QoS request for CPU_DMA_LATENCY can be better optimized if the request
can be set only for the required cpus and not all cpus. This helps save
power on other cores, while still gauranteeing the quality of service.
Enhance the QoS constraints data structures to support target value for
each core. Requests specify if the QoS is applicable to all cores
(default) or to a selective subset of the cores or to a core(s), that the
IRQ is affine to.
QoS requests that need to track an IRQ can be set to apply only on the
cpus to which the IRQ's smp_affinity attribute is set to. The QoS
framework will automatically track IRQ migration between the cores. The
QoS is updated to be applied only to the core(s) that the IRQ has been
migrated to.
Idle and interested drivers can request a PM QoS value for a constraint
across all cpus, or a specific cpu or a set of cpus. Separate APIs have
been added to request for individual cpu or a cpumask. The default
behaviour of PM QoS is maintained i.e, requests that do not specify a
type of the request will continue to be effected on all cores. Requests
that want to specify an affinity of cpu(s) or an irq, can modify the PM
QoS request data structures by specifying the type of the request and
either the mask of the cpus or the IRQ number depending on the type.
Updating the request does not reset the type of the request.
The userspace sysfs interface does not support CPU/IRQ affinity.
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
(cherry picked from commit 16cafdb44fb3a66a7d06936d775efe483ad62b7d)
Bug: 153463922
Test: build
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I1aad836a985fd303f2254fe607bb909a6b720dd5
It's long been possible to disable kernel module autoloading completely
(while still allowing manual module insertion) by setting
/proc/sys/kernel/modprobe to the empty string. This can be preferable
to setting it to a nonexistent file since it avoids the overhead of an
attempted execve(), avoids potential deadlocks, and avoids the call to
security_kernel_module_request() and thus on SELinux-based systems
eliminates the need to write SELinux rules to dontaudit module_request.
However, when module autoloading is disabled in this way,
request_module() returns 0. This is broken because callers expect 0 to
mean that the module was successfully loaded.
Apparently this was never noticed because this method of disabling
module autoloading isn't used much, and also most callers don't use the
return value of request_module() since it's always necessary to check
whether the module registered its functionality or not anyway. But
improperly returning 0 can indeed confuse a few callers, for example
get_fs_type() in fs/filesystems.c where it causes a WARNING to be hit:
if (!fs && (request_module("fs-%.*s", len, name) == 0)) {
fs = __get_fs_type(name, len);
WARN_ONCE(!fs, "request_module fs-%.*s succeeded, but still no fs?\n", len, name);
}
This is easily reproduced with:
echo > /proc/sys/kernel/modprobe
mount -t NONEXISTENT none /
It causes:
request_module fs-NONEXISTENT succeeded, but still no fs?
WARNING: CPU: 1 PID: 1106 at fs/filesystems.c:275 get_fs_type+0xd6/0xf0
[...]
This should actually use pr_warn_once() rather than WARN_ONCE(), since
it's also user-reachable if userspace immediately unloads the module.
Regardless, request_module() should correctly return an error when it
fails. So let's make it return -ENOENT, which matches the error when
the modprobe binary doesn't exist.
I've also sent patches to document and test this case.
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Jessica Yu <jeyu@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: NeilBrown <neilb@suse.com>
Link: https://lore.kernel.org/r/20200318230515.171692-2-ebiggers@kernel.org
Bug: 151589316
Change-Id: I5e04f85e12a4f85da23e53bc11da1ade565abcd6
Signed-off-by: Eric Biggers <ebiggers@google.com>
A previous change added a test on the wrong config flag; rename
CFI to CFI_CLANG.
Bug: 145210207
Change-Id: Id8aead2eb2c75ad6442d10165f6cb86ccfb9c2f9
Signed-off-by: Alistair Delva <adelva@google.com>
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Merge 4.19.114 into android-4.19
Changes in 4.19.114
mmc: core: Allow host controllers to require R1B for CMD6
mmc: core: Respect MMC_CAP_NEED_RSP_BUSY for erase/trim/discard
mmc: core: Respect MMC_CAP_NEED_RSP_BUSY for eMMC sleep command
mmc: sdhci-omap: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY
mmc: sdhci-tegra: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY
Revert "drm/dp_mst: Skip validating ports during destruction, just ref"
geneve: move debug check after netdev unregister
hsr: fix general protection fault in hsr_addr_is_self()
macsec: restrict to ethernet devices
mlxsw: spectrum_mr: Fix list iteration in error path
net: cbs: Fix software cbs to consider packet sending time
net: dsa: Fix duplicate frames flooded by learning
net: mvneta: Fix the case where the last poll did not process all rx
net/packet: tpacket_rcv: avoid a producer race condition
net: qmi_wwan: add support for ASKEY WWHC050
net_sched: cls_route: remove the right filter from hashtable
net_sched: keep alloc_hash updated after hash allocation
net: stmmac: dwmac-rk: fix error path in rk_gmac_probe
NFC: fdp: Fix a signedness bug in fdp_nci_send_patch()
slcan: not call free_netdev before rtnl_unlock in slcan_open
bnxt_en: fix memory leaks in bnxt_dcbnl_ieee_getets()
bnxt_en: Reset rings if ring reservation fails during open()
net: ip_gre: Separate ERSPAN newlink / changelink callbacks
net: ip_gre: Accept IFLA_INFO_DATA-less configuration
net: dsa: mt7530: Change the LINK bit to reflect the link status
net: phy: mdio-mux-bcm-iproc: check clk_prepare_enable() return value
r8169: re-enable MSI on RTL8168c
tcp: repair: fix TCP_QUEUE_SEQ implementation
vxlan: check return value of gro_cells_init()
hsr: use rcu_read_lock() in hsr_get_node_{list/status}()
hsr: add restart routine into hsr_get_node_list()
hsr: set .netnsok flag
cgroup-v1: cgroup_pidlist_next should update position index
nfs: add minor version to nfs_server_key for fscache
cpupower: avoid multiple definition with gcc -fno-common
drivers/of/of_mdio.c:fix of_mdiobus_register()
cgroup1: don't call release_agent when it is ""
dt-bindings: net: FMan erratum A050385
arm64: dts: ls1043a: FMan erratum A050385
fsl/fman: detect FMan erratum A050385
s390/qeth: handle error when backing RX buffer
scsi: ipr: Fix softlockup when rescanning devices in petitboot
mac80211: Do not send mesh HWMP PREQ if HWMP is disabled
dpaa_eth: Remove unnecessary boolean expression in dpaa_get_headroom
sxgbe: Fix off by one in samsung driver strncpy size arg
ftrace/x86: Anotate text_mutex split between ftrace_arch_code_modify_post_process() and ftrace_arch_code_modify_prepare()
i2c: hix5hd2: add missed clk_disable_unprepare in remove
Input: raydium_i2c_ts - fix error codes in raydium_i2c_boot_trigger()
Input: synaptics - enable RMI on HP Envy 13-ad105ng
Input: avoid BIT() macro usage in the serio.h UAPI header
ceph: check POOL_FLAG_FULL/NEARFULL in addition to OSDMAP_FULL/NEARFULL
ARM: dts: dra7: Add bus_dma_limit for L3 bus
ARM: dts: omap5: Add bus_dma_limit for L3 bus
perf probe: Do not depend on dwfl_module_addrsym()
tools: Let O= makes handle a relative path with -C option
scripts/dtc: Remove redundant YYLOC global declaration
scsi: sd: Fix optimal I/O size for devices that change reported values
nl80211: fix NL80211_ATTR_CHANNEL_WIDTH attribute type
mac80211: mark station unauthorized before key removal
gpiolib: acpi: Correct comment for HP x2 10 honor_wakeup quirk
gpiolib: acpi: Rework honor_wakeup option into an ignore_wake option
gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 BYT + AXP288 model
RDMA/core: Ensure security pkey modify is not lost
genirq: Fix reference leaks on irq affinity notifiers
xfrm: handle NETDEV_UNREGISTER for xfrm device
vti[6]: fix packet tx through bpf_redirect() in XinY cases
RDMA/mlx5: Block delay drop to unprivileged users
xfrm: fix uctx len check in verify_sec_ctx_len
xfrm: add the missing verify_sec_ctx_len check in xfrm_add_acquire
xfrm: policy: Fix doulbe free in xfrm_policy_timer
afs: Fix some tracing details
netfilter: flowtable: reload ip{v6}h in nf_flow_tuple_ip{v6}
netfilter: nft_fwd_netdev: validate family and chain type
bpf/btf: Fix BTF verification of enum members in struct/union
vti6: Fix memory leak of skb if input policy check fails
Revert "r8169: check that Realtek PHY driver module is loaded"
mac80211: add option for setting control flags
mac80211: set IEEE80211_TX_CTRL_PORT_CTRL_PROTO for nl80211 TX
USB: serial: option: add support for ASKEY WWHC050
USB: serial: option: add BroadMobi BM806U
USB: serial: option: add Wistron Neweb D19Q1
USB: cdc-acm: restore capability check order
USB: serial: io_edgeport: fix slab-out-of-bounds read in edge_interrupt_callback
usb: musb: fix crash with highmen PIO and usbmon
media: flexcop-usb: fix endpoint sanity check
media: usbtv: fix control-message timeouts
staging: rtl8188eu: Add ASUS USB-N10 Nano B1 to device table
staging: wlan-ng: fix ODEBUG bug in prism2sta_disconnect_usb
staging: wlan-ng: fix use-after-free Read in hfa384x_usbin_callback
ahci: Add Intel Comet Lake H RAID PCI ID
libfs: fix infoleak in simple_attr_read()
media: ov519: add missing endpoint sanity checks
media: dib0700: fix rc endpoint lookup
media: stv06xx: add missing descriptor sanity checks
media: xirlink_cit: add missing descriptor sanity checks
mac80211: Check port authorization in the ieee80211_tx_dequeue() case
mac80211: fix authentication with iwlwifi/mvm
vt: selection, introduce vc_is_sel
vt: ioctl, switch VT_IS_IN_USE and VT_BUSY to inlines
vt: switch vt_dont_switch to bool
vt: vt_ioctl: remove unnecessary console allocation checks
vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console
vt: vt_ioctl: fix use-after-free in vt_in_use()
platform/x86: pmc_atom: Add Lex 2I385SW to critclk_systems DMI table
bpf: Explicitly memset the bpf_attr structure
bpf: Explicitly memset some bpf info structures declared on the stack
gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 CHT + AXP288 model
net: ks8851-ml: Fix IO operations, again
arm64: alternative: fix build with clang integrated assembler
perf map: Fix off by one in strncpy() size argument
ARM: dts: oxnas: Fix clear-mask property
ARM: bcm2835-rpi-zero-w: Add missing pinctrl name
ARM: dts: imx6: phycore-som: fix arm and soc minimum voltage
ARM: dts: N900: fix onenand timings
arm64: dts: ls1043a-rdb: correct RGMII delay mode to rgmii-id
arm64: dts: ls1046ardb: set RGMII interfaces to RGMII_ID mode
Linux 4.19.114
Change-Id: Icc165d2e49aba750e1b5a8856d9774c149e59ce7
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
A module uses these symbols. So, export them to allow loading of that
module.
Bug: 149816871
Bug: 149256712
Signed-off-by: Saravana Kannan <saravanak@google.com>
Change-Id: I949da5d091894ea3d79a6c9244bfc2f8426eee71
(cherry picked from commit dc928ba3bdfb4527e0ffca7c491d946a02e5bd11)
[ qperret: made changes to commit message for AOSP compliance ]
Signed-off-by: Quentin Perret <qperret@google.com>
commit 5c6f258879 upstream.
Trying to initialize a structure with "= {};" will not always clean out
all padding locations in a structure. So be explicit and call memset to
initialize everything for a number of bpf information structures that
are then copied from userspace, sometimes from smaller memory locations
than the size of the structure.
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200320162258.GA794295@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8096f22942 upstream.
For the bpf syscall, we are relying on the compiler to properly zero out
the bpf_attr union that we copy userspace data into. Unfortunately that
doesn't always work properly, padding and other oddities might not be
correctly zeroed, and in some tests odd things have been found when the
stack is pre-initialized to other values.
Fix this by explicitly memsetting the structure to 0 before using it.
Reported-by: Maciej Żenczykowski <maze@google.com>
Reported-by: John Stultz <john.stultz@linaro.org>
Reported-by: Alexander Potapenko <glider@google.com>
Reported-by: Alistair Delva <adelva@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://android-review.googlesource.com/c/kernel/common/+/1235490
Link: https://lore.kernel.org/bpf/20200320094813.GA421650@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit da6c7faeb1 upstream.
btf_enum_check_member() was currently sure to recognize the size of
"enum" type members in struct/union as the size of "int" even if
its size was packed.
This patch fixes BTF enum verification to use the correct size
of member in BPF programs.
Fixes: 179cde8cef ("bpf: btf: Check members of struct/union")
Signed-off-by: Yoshiki Komachi <komachi.yoshiki@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/1583825550-18606-2-git-send-email-komachi.yoshiki@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit df81dfcfd6 upstream.
The handling of notify->work did not properly maintain notify->kref in two
cases:
1) where the work was already scheduled, another irq_set_affinity_locked()
would get the ref and (no-op-ly) schedule the work. Thus when
irq_affinity_notify() ran, it would drop the original ref but not the
additional one.
2) when cancelling the (old) work in irq_set_affinity_notifier(), if there
was outstanding work a ref had been got for it but was never put.
Fix both by checking the return values of the work handling functions
(schedule_work() for (1) and cancel_work_sync() for (2)) and put the
extra ref if the return value indicates preexisting work.
Fixes: cd7eab44e9 ("genirq: Add IRQ affinity notifiers")
Fixes: 59c39840f5 ("genirq: Prevent use-after-free and work list corruption")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ben Hutchings <ben@decadent.org.uk>
Link: https://lkml.kernel.org/r/24f5983f-2ab5-e83a-44ee-a45b5f9300f5@solarflare.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 2e5383d790 ]
Older (and maybe current) versions of systemd set release_agent to "" when
shutting down, but do not set notify_on_release to 0.
Since 64e90a8acb ("Introduce STATIC_USERMODEHELPER to mediate
call_usermodehelper()"), we filter out such calls when the user mode helper
path is "". However, when used in conjunction with an actual (i.e. non "")
STATIC_USERMODEHELPER, the path is never "", so the real usermode helper
will be called with argv[0] == "".
Let's avoid this by not invoking the release_agent when it is "".
Signed-off-by: Tycho Andersen <tycho@tycho.ws>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit db8dd96972 ]
if seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output.
# mount | grep cgroup
# dd if=/mnt/cgroup.procs bs=1 # normal output
...
1294
1295
1296
1304
1382
584+0 records in
584+0 records out
584 bytes copied
dd: /mnt/cgroup.procs: cannot skip to specified offset
83 <<< generates end of last line
1383 <<< ... and whole last line once again
0+1 records in
0+1 records out
8 bytes copied
dd: /mnt/cgroup.procs: cannot skip to specified offset
1386 <<< generates last line anyway
0+1 records in
0+1 records out
5 bytes copied
https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
If we failed to find a fitting CPU, in cpupri_find(), we only fallback
to the level we found a hit at.
But Steve suggested to fallback to a second full scan instead as this
could be a better effort.
https://lore.kernel.org/lkml/20200304135404.146c56eb@gandalf.local.home/
We trigger the 2nd search unconditionally since the argument about
triggering a full search is that the recorded fall back level might have
become empty by then. Which means storing any data about what happened
would be meaningless and stale.
I had a humble try at timing it and it seemed okay for the small 6 CPUs
system I was running on
https://lore.kernel.org/lkml/20200305124324.42x6ehjxbnjkklnh@e107158-lin.cambridge.arm.com/
On large system this second full scan could be expensive. But there are
no users outside capacity awareness for this fitness function at the
moment. Heterogeneous systems tend to be small with 8cores in total.
Bug: 120440300
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lkml.kernel.org/r/20200310142219.syxzn5ljpdxqtbgx@e107158-lin.cambridge.arm.com
(cherry picked from commit e94f80f6c4https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core)
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: Ib20d400be47cd913a43a5c71fafee6a7fffb78aa
In task_woken_rt() and switched_to_rto() we try trigger push-pull if the
task is unfit.
But the logic is found lacking because if the task was the only one
running on the CPU, then rt_rq is not in overloaded state and won't
trigger a push.
The necessity of this logic was under a debate as well, a summary of
the discussion can be found in the following thread:
https://lore.kernel.org/lkml/20200226160247.iqvdakiqbakk2llz@e107158-lin.cambridge.arm.com/
Remove the logic for now until a better approach is agreed upon.
Bug: 120440300
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: 804d402fb6 ("sched/rt: Make RT capacity-aware")
Link: https://lkml.kernel.org/r/20200302132721.8353-6-qais.yousef@arm.com
(cherry picked from commit d94a9df490https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core)
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: Id120ada4a89972b3feb8d8b022babb98db1a157f
When implemented RT Capacity Awareness; the logic was done such that if
a task was running on a fitting CPU, then it was sticky and we would try
our best to keep it there.
But as Steve suggested, to adhere to the strict priority rules of RT
class; allow pulling an RT task to unfitting CPU to ensure it gets a
chance to run ASAP.
Bug: 120440300
LINK: https://lore.kernel.org/lkml/20200203111451.0d1da58f@oasis.local.home/
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: 804d402fb6 ("sched/rt: Make RT capacity-aware")
Link: https://lkml.kernel.org/r/20200302132721.8353-5-qais.yousef@arm.com
(cherry picked from commit 98ca645f82https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core)
[Trivial merge conflict]
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: Ie25fa5a4f3b0979ed06df8d156e5586b2928479e
By introducing a new cpupri_find_fitness() function that takes the
fitness_fn as an argument and only called when asym_system static key is
enabled.
cpupri_find() is now a wrapper function that calls cpupri_find_fitness()
passing NULL as a fitness_fn, hence disabling the logic that handles
fitness by default.
Bug: 120440300
LINK: https://lore.kernel.org/lkml/c0772fca-0a4b-c88d-fdf2-5715fcf8447b@arm.com/
Reported-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: 804d402fb6 ("sched/rt: Make RT capacity-aware")
Link: https://lkml.kernel.org/r/20200302132721.8353-4-qais.yousef@arm.com
(cherry picked from commit a1bd02e1f2https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core)
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: I8ad4d9e391030ae499f7a1805485147de64abcdf
When RT Capacity Aware support was added, the logic in select_task_rq_rt
was modified to force a search for a fitting CPU if the task currently
doesn't run on one.
But if the search failed, and the search was only triggered to fulfill
the fitness request; we could end up selecting a new CPU unnecessarily.
Fix this and re-instate the original behavior by ensuring we bail out
in that case.
This behavior change only affected asymmetric systems that are using
util_clamp to implement capacity aware. None asymmetric systems weren't
affected.
Bug: 120440300
LINK: https://lore.kernel.org/lkml/20200218041620.GD28029@codeaurora.org/
Reported-by: Pavan Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: 804d402fb6 ("sched/rt: Make RT capacity-aware")
Link: https://lkml.kernel.org/r/20200302132721.8353-3-qais.yousef@arm.com
(cherry picked from commit b28bc1e002https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core)
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: I670ab7f95a3bd8b4790e1cafe89308ead524367e
When searching for the best lowest_mask with a fitness_fn passed, make
sure we record the lowest_level that returns a valid lowest_mask so that
we can use that as a fallback in case we fail to find a fitting CPU at
all levels.
The intention in the original patch was not to allow a down migration to
unfitting CPU. But this missed the case where we are already running on
unfitting one.
With this change now RT tasks can still move between unfitting CPUs when
they're already running on such CPU.
And as Steve suggested; to adhere to the strict priority rules of RT, if
a task is already running on a fitting CPU but due to priority it can't
run on it, allow it to downmigrate to unfitting CPU so it can run.
Bug: 120440300
Reported-by: Pavan Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: 804d402fb6 ("sched/rt: Make RT capacity-aware")
Link: https://lkml.kernel.org/r/20200302132721.8353-2-qais.yousef@arm.com
Link: https://lore.kernel.org/lkml/20200203142712.a7yvlyo2y3le5cpn@e107158-lin/
(cherry picked from commit d9cb236b94https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core)
[Trivial merge conflict]
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: I3430e9624f8f7b11d3875c39c5765a51aec4a6f5
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Merge 4.19.113 into android-4.19
Changes in 4.19.113
drm/mediatek: Find the cursor plane instead of hard coding it
spi: qup: call spi_qup_pm_resume_runtime before suspending
powerpc: Include .BTF section
ARM: dts: dra7: Add "dma-ranges" property to PCIe RC DT nodes
spi: pxa2xx: Add CS control clock quirk
spi/zynqmp: remove entry that causes a cs glitch
drm/exynos: dsi: propagate error value and silence meaningless warning
drm/exynos: dsi: fix workaround for the legacy clock name
drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer
altera-stapl: altera_get_note: prevent write beyond end of 'key'
dm bio record: save/restore bi_end_io and bi_integrity
dm integrity: use dm_bio_record and dm_bio_restore
riscv: avoid the PIC offset of static percpu data in module beyond 2G limits
drm/amd/display: Clear link settings on MST disable connector
drm/amd/display: fix dcc swath size calculations on dcn1
xenbus: req->body should be updated before req->state
xenbus: req->err should be updated before req->state
block, bfq: fix overwrite of bfq_group pointer in bfq_find_set_group()
parse-maintainers: Mark as executable
USB: Disable LPM on WD19's Realtek Hub
usb: quirks: add NO_LPM quirk for RTL8153 based ethernet adapters
USB: serial: option: add ME910G1 ECM composition 0x110b
usb: host: xhci-plat: add a shutdown
USB: serial: pl2303: add device-id for HP LD381
usb: xhci: apply XHCI_SUSPEND_DELAY to AMD XHCI controller 1022:145c
ALSA: line6: Fix endless MIDI read loop
ALSA: seq: virmidi: Fix running status after receiving sysex
ALSA: seq: oss: Fix running status after receiving sysex
ALSA: pcm: oss: Avoid plugin buffer overflow
ALSA: pcm: oss: Remove WARNING from snd_pcm_plug_alloc() checks
iio: st_sensors: remap SMO8840 to LIS2DH12
iio: trigger: stm32-timer: disable master mode when stopping
iio: magnetometer: ak8974: Fix negative raw values in sysfs
iio: adc: at91-sama5d2_adc: fix differential channels in triggered mode
mmc: rtsx_pci: Fix support for speed-modes that relies on tuning
mmc: sdhci-of-at91: fix cd-gpios for SAMA5D2
staging: rtl8188eu: Add device id for MERCUSYS MW150US v2
staging: greybus: loopback_test: fix poll-mask build breakage
staging/speakup: fix get_word non-space look-ahead
intel_th: Fix user-visible error codes
intel_th: pci: Add Elkhart Lake CPU support
rtc: max8907: add missing select REGMAP_IRQ
xhci: Do not open code __print_symbolic() in xhci trace events
btrfs: fix log context list corruption after rename whiteout error
drm/amd/amdgpu: Fix GPR read from debugfs (v2)
drm/lease: fix WARNING in idr_destroy
memcg: fix NULL pointer dereference in __mem_cgroup_usage_unregister_event
mm: slub: be more careful about the double cmpxchg of freelist
mm, slub: prevent kmalloc_node crashes and memory leaks
page-flags: fix a crash at SetPageError(THP_SWAP)
x86/mm: split vmalloc_sync_all()
USB: cdc-acm: fix close_delay and closing_wait units in TIOCSSERIAL
USB: cdc-acm: fix rounding error in TIOCSSERIAL
iio: light: vcnl4000: update sampling periods for vcnl4200
kbuild: Disable -Wpointer-to-enum-cast
futex: Fix inode life-time issue
futex: Unbreak futex hashing
Revert "vrf: mark skb for multicast or link-local as enslaved to VRF"
Revert "ipv6: Fix handling of LLA with VRF and sockets bound to VRF"
ALSA: hda/realtek: Fix pop noise on ALC225
arm64: smp: fix smp_send_stop() behaviour
arm64: smp: fix crash_smp_send_stop() behaviour
drm/bridge: dw-hdmi: fix AVI frame colorimetry
staging: greybus: loopback_test: fix potential path truncation
staging: greybus: loopback_test: fix potential path truncations
Linux 4.19.113
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I90c48cd7189a964e59d199ecc0f32c0a68688ec5
commit 8d67743653 upstream.
The recent futex inode life time fix changed the ordering of the futex key
union struct members, but forgot to adjust the hash function accordingly,
As a result the hashing omits the leading 64bit and even hashes beyond the
futex key causing a bad hash distribution which led to a ~100% performance
regression.
Hand in the futex key pointer instead of a random struct member and make
the size calculation based of the struct offset.
Fixes: 8019ad13ef ("futex: Fix inode life-time issue")
Reported-by: Rong Chen <rong.a.chen@intel.com>
Decoded-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Rong Chen <rong.a.chen@intel.com>
Link: https://lkml.kernel.org/r/87h7yy90ve.fsf@nanos.tec.linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8019ad13ef upstream.
As reported by Jann, ihold() does not in fact guarantee inode
persistence. And instead of making it so, replace the usage of inode
pointers with a per boot, machine wide, unique inode identifier.
This sequence number is global, but shared (file backed) futexes are
rare enough that this should not become a performance issue.
Reported-by: Jann Horn <jannh@google.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 763802b53a upstream.
Commit 3f8fd02b1b ("mm/vmalloc: Sync unmappings in
__purge_vmap_area_lazy()") introduced a call to vmalloc_sync_all() in
the vunmap() code-path. While this change was necessary to maintain
correctness on x86-32-pae kernels, it also adds additional cycles for
architectures that don't need it.
Specifically on x86-64 with CONFIG_VMAP_STACK=y some people reported
severe performance regressions in micro-benchmarks because it now also
calls the x86-64 implementation of vmalloc_sync_all() on vunmap(). But
the vmalloc_sync_all() implementation on x86-64 is only needed for newly
created mappings.
To avoid the unnecessary work on x86-64 and to gain the performance
back, split up vmalloc_sync_all() into two functions:
* vmalloc_sync_mappings(), and
* vmalloc_sync_unmappings()
Most call-sites to vmalloc_sync_all() only care about new mappings being
synchronized. The only exception is the new call-site added in the
above mentioned commit.
Shile Zhang directed us to a report of an 80% regression in reaim
throughput.
Fixes: 3f8fd02b1b ("mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Shile Zhang <shile.zhang@linux.alibaba.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Borislav Petkov <bp@suse.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [GHES]
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20191009124418.8286-1-joro@8bytes.org
Link: https://lists.01.org/hyperkitty/list/lkp@lists.01.org/thread/4D3JPPHBNOSPFK2KEPC6KGKS6J25AIDB/
Link: http://lkml.kernel.org/r/20191113095530.228959-1-shile.zhang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add get_next_event_cpu to get the next wakeup time for the CPU. This
is used by the sleep driver if it has to query the next wakeup for a
CPU other than the thread that its running on.
Test: make
Bug: 150895657
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
Change-Id: I0f0347f9648932a55cb64c630694d0a2e290b633
(cherry picked from commit e948653a6a5cb055b5ed692d52817e52f02a1bb1)
[hridya: also added an EXPORT_SYMBOL_GPL(get_next_event_cpu) to make
the symbol available to kernel modules.]
Signed-off-by: Hridya Valsaraju <hridya@google.com>
Trying to initialize a structure with "= {};" will not always clean out
all padding locations in a structure. So be explicit and call memset to
initialize everything for a number of bpf information structures that
are then copied from userspace, sometimes from smaller memory locations
than the size of the structure.
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200320162258.GA794295@kroah.com
(cherry picked from commit 269efb7fc478563a7e7b22590d8076823f4ac82a)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I52a2cab20aa310085ec104bd811ac4f2b83657b6
For the bpf syscall, we are relying on the compiler to properly zero out
the bpf_attr union that we copy userspace data into. Unfortunately that
doesn't always work properly, padding and other oddities might not be
correctly zeroed, and in some tests odd things have been found when the
stack is pre-initialized to other values.
Fix this by explicitly memsetting the structure to 0 before using it.
Reported-by: Maciej Żenczykowski <maze@google.com>
Reported-by: John Stultz <john.stultz@linaro.org>
Reported-by: Alexander Potapenko <glider@google.com>
Reported-by: Alistair Delva <adelva@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://android-review.googlesource.com/c/kernel/common/+/1235490
Link: https://lore.kernel.org/bpf/20200320094813.GA421650@kroah.com
(cherry picked from commit 8096f22942)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I2dc28cd45024da5cc6861ff4a9b25fae389cc6d8
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Merge 4.19.112 into android-4.19
Changes in 4.19.112
perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag
mmc: sdhci-omap: Add platform specific reset callback
mmc: sdhci-omap: Workaround errata regarding SDR104/HS200 tuning failures (i929)
mmc: host: Fix Kconfig warnings on keystone_defconfig
ACPI: watchdog: Allow disabling WDAT at boot
HID: apple: Add support for recent firmware on Magic Keyboards
HID: i2c-hid: add Trekstor Surfbook E11B to descriptor override
cfg80211: check reg_rule for NULL in handle_channel_custom()
scsi: libfc: free response frame from GPN_ID
net: usb: qmi_wwan: restore mtu min/max values after raw_ip switch
net: ks8851-ml: Fix IRQ handling and locking
mac80211: rx: avoid RCU list traversal under mutex
signal: avoid double atomic counter increments for user accounting
slip: not call free_netdev before rtnl_unlock in slip_open
hinic: fix a irq affinity bug
hinic: fix a bug of setting hw_ioctxt
net: rmnet: fix NULL pointer dereference in rmnet_newlink()
net: rmnet: fix NULL pointer dereference in rmnet_changelink()
net: rmnet: fix suspicious RCU usage
net: rmnet: remove rcu_read_lock in rmnet_force_unassociate_device()
net: rmnet: do not allow to change mux id if mux id is duplicated
net: rmnet: use upper/lower device infrastructure
net: rmnet: fix bridge mode bugs
net: rmnet: fix packet forwarding in rmnet bridge mode
sfc: fix timestamp reconstruction at 16-bit rollover points
jbd2: fix data races at struct journal_head
wimax: i2400: fix memory leak
wimax: i2400: Fix memory leak in i2400m_op_rfkill_sw_toggle
mmc: sdhci-omap: Don't finish_mrq() on a command error during tuning
mmc: sdhci-omap: Fix Tuning procedure for temperatures < -20C
driver core: Remove the link if there is no driver with AUTO flag
driver core: Fix adding device links to probing suppliers
driver core: Make driver core own stateful device links
driver core: Add device link flag DL_FLAG_AUTOPROBE_CONSUMER
driver core: Remove device link creation limitation
driver core: Fix creation of device links with PM-runtime flags
net: qrtr: fix len of skb_put_padto in qrtr_node_enqueue
ARM: 8957/1: VDSO: Match ARMv8 timer in cntvct_functional()
ARM: 8958/1: rename missed uaccess .fixup section
mm: slub: add missing TID bump in kmem_cache_alloc_bulk()
HID: google: add moonball USB id
efi: Fix debugobjects warning on 'efi_rts_work'
ipv4: ensure rcu_read_lock() in cipso_v4_error()
Linux 4.19.112
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I68bb3ea9d74f698994a1b958d112827a0873a0f7
[ Upstream commit fda31c5029 ]
When queueing a signal, we increment both the users count of pending
signals (for RLIMIT_SIGPENDING tracking) and we increment the refcount
of the user struct itself (because we keep a reference to the user in
the signal structure in order to correctly account for it when freeing).
That turns out to be fairly expensive, because both of them are atomic
updates, and particularly under extreme signal handling pressure on big
machines, you can get a lot of cache contention on the user struct.
That can then cause horrid cacheline ping-pong when you do these
multiple accesses.
So change the reference counting to only pin the user for the _first_
pending signal, and to unpin it when the last pending signal is
dequeued. That means that when a user sees a lot of concurrent signal
queuing - which is the only situation when this matters - the only
atomic access needed is generally the 'sigpending' count update.
This was noticed because of a particularly odd timing artifact on a
dual-socket 96C/192T Cascade Lake platform: when you get into bad
contention, on that machine for some reason seems to be much worse when
the contention happens in the upper 32-byte half of the cacheline.
As a result, the kernel test robot will-it-scale 'signal1' benchmark had
an odd performance regression simply due to random alignment of the
'struct user_struct' (and pointed to a completely unrelated and
apparently nonsensical commit for the regression).
Avoiding the double increments (and decrements on the dequeueing side,
of course) makes for much less contention and hugely improved
performance on that will-it-scale microbenchmark.
Quoting Feng Tang:
"It makes a big difference, that the performance score is tripled! bump
from original 17000 to 54000. Also the gap between 5.0-rc6 and
5.0-rc6+Jiri's patch is reduced to around 2%"
[ The "2% gap" is the odd cacheline placement difference on that
platform: under the extreme contention case, the effect of which half
of the cacheline was hot was 5%, so with the reduced contention the
odd timing artifact is reduced too ]
It does help in the non-contended case too, but is not nearly as
noticeable.
Reported-and-tested-by: Feng Tang <feng.tang@intel.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Philip Li <philip.li@intel.com>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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Merge 4.19.111 into android-4.19
Changes in 4.19.111
phy: Revert toggling reset changes.
net: phy: Avoid multiple suspends
cgroup, netclassid: periodically release file_lock on classid updating
gre: fix uninit-value in __iptunnel_pull_header
inet_diag: return classid for all socket types
ipv6/addrconf: call ipv6_mc_up() for non-Ethernet interface
ipvlan: add cond_resched_rcu() while processing muticast backlog
ipvlan: do not add hardware address of master to its unicast filter list
ipvlan: do not use cond_resched_rcu() in ipvlan_process_multicast()
ipvlan: don't deref eth hdr before checking it's set
net/ipv6: use configured metric when add peer route
netlink: Use netlink header as base to calculate bad attribute offset
net: macsec: update SCI upon MAC address change.
net: nfc: fix bounds checking bugs on "pipe"
net/packet: tpacket_rcv: do not increment ring index on drop
net: stmmac: dwmac1000: Disable ACS if enhanced descs are not used
net: systemport: fix index check to avoid an array out of bounds access
r8152: check disconnect status after long sleep
sfc: detach from cb_page in efx_copy_channel()
bnxt_en: reinitialize IRQs when MTU is modified
cgroup: memcg: net: do not associate sock with unrelated cgroup
net: memcg: late association of sock to memcg
net: memcg: fix lockdep splat in inet_csk_accept()
devlink: validate length of param values
fib: add missing attribute validation for tun_id
nl802154: add missing attribute validation
nl802154: add missing attribute validation for dev_type
can: add missing attribute validation for termination
macsec: add missing attribute validation for port
net: fq: add missing attribute validation for orphan mask
team: add missing attribute validation for port ifindex
team: add missing attribute validation for array index
nfc: add missing attribute validation for SE API
nfc: add missing attribute validation for deactivate target
nfc: add missing attribute validation for vendor subcommand
net: phy: fix MDIO bus PM PHY resuming
selftests/net/fib_tests: update addr_metric_test for peer route testing
net/ipv6: need update peer route when modify metric
net/ipv6: remove the old peer route if change it to a new one
tipc: add missing attribute validation for MTU property
devlink: validate length of region addr/len
bonding/alb: make sure arp header is pulled before accessing it
slip: make slhc_compress() more robust against malicious packets
net: fec: validate the new settings in fec_enet_set_coalesce()
macvlan: add cond_resched() during multicast processing
cgroup: cgroup_procs_next should increase position index
cgroup: Iterate tasks that did not finish do_exit()
iwlwifi: mvm: Do not require PHY_SKU NVM section for 3168 devices
virtio-blk: fix hw_queue stopped on arbitrary error
iommu/vt-d: quirk_ioat_snb_local_iommu: replace WARN_TAINT with pr_warn + add_taint
netfilter: nf_conntrack: ct_cpu_seq_next should increase position index
netfilter: synproxy: synproxy_cpu_seq_next should increase position index
netfilter: xt_recent: recent_seq_next should increase position index
netfilter: x_tables: xt_mttg_seq_next should increase position index
workqueue: don't use wq_select_unbound_cpu() for bound works
drm/amd/display: remove duplicated assignment to grph_obj_type
ktest: Add timeout for ssh sync testing
cifs_atomic_open(): fix double-put on late allocation failure
gfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache
KVM: x86: clear stale x86_emulate_ctxt->intercept value
ARC: define __ALIGN_STR and __ALIGN symbols for ARC
macintosh: windfarm: fix MODINFO regression
efi: Fix a race and a buffer overflow while reading efivars via sysfs
efi: Make efi_rts_work accessible to efi page fault handler
mt76: fix array overflow on receiving too many fragments for a packet
x86/mce: Fix logic and comments around MSR_PPIN_CTL
iommu/dma: Fix MSI reservation allocation
iommu/vt-d: dmar: replace WARN_TAINT with pr_warn + add_taint
iommu/vt-d: Fix a bug in intel_iommu_iova_to_phys() for huge page
batman-adv: Don't schedule OGM for disabled interface
pinctrl: meson-gxl: fix GPIOX sdio pins
pinctrl: core: Remove extra kref_get which blocks hogs being freed
drm/i915/gvt: Fix unnecessary schedule timer when no vGPU exits
i2c: gpio: suppress error on probe defer
nl80211: add missing attribute validation for critical protocol indication
nl80211: add missing attribute validation for beacon report scanning
nl80211: add missing attribute validation for channel switch
perf bench futex-wake: Restore thread count default to online CPU count
netfilter: cthelper: add missing attribute validation for cthelper
netfilter: nft_payload: add missing attribute validation for payload csum flags
netfilter: nft_tunnel: add missing attribute validation for tunnels
iommu/vt-d: Fix the wrong printing in RHSA parsing
iommu/vt-d: Ignore devices with out-of-spec domain number
i2c: acpi: put device when verifying client fails
ipv6: restrict IPV6_ADDRFORM operation
net/smc: check for valid ib_client_data
net/smc: cancel event worker during device removal
efi: Add a sanity check to efivar_store_raw()
batman-adv: Avoid free/alloc race when handling OGM2 buffer
Linux 4.19.111
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ide220f0b6a12d291bda4a83f17cde25bbe64e2ff
commit aa202f1f56 upstream.
wq_select_unbound_cpu() is designed for unbound workqueues only, but
it's wrongly called when using a bound workqueue too.
Fixing this ensures work queued to a bound workqueue with
cpu=WORK_CPU_UNBOUND always runs on the local CPU.
Before, that would happen only if wq_unbound_cpumask happened to include
it (likely almost always the case), or was empty, or we got lucky with
forced round-robin placement. So restricting
/sys/devices/virtual/workqueue/cpumask to a small subset of a machine's
CPUs would cause some bound work items to run unexpectedly there.
Fixes: ef55718044 ("workqueue: schedule WORK_CPU_UNBOUND work on wq_unbound_cpumask CPUs")
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: Hillf Danton <hdanton@sina.com>
[dj: massage changelog]
Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 9c974c7724 upstream.
PF_EXITING is set earlier than actual removal from css_set when a task
is exitting. This can confuse cgroup.procs readers who see no PF_EXITING
tasks, however, rmdir is checking against css_set membership so it can
transitionally fail with EBUSY.
Fix this by listing tasks that weren't unlinked from css_set active
lists.
It may happen that other users of the task iterator (without
CSS_TASK_ITER_PROCS) spot a PF_EXITING task before cgroup_exit(). This
is equal to the state before commit c03cd7738a ("cgroup: Include dying
leaders with live threads in PROCS iterations") but it may be reviewed
later.
Reported-by: Suren Baghdasaryan <surenb@google.com>
Fixes: c03cd7738a ("cgroup: Include dying leaders with live threads in PROCS iterations")
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 2d4ecb030d upstream.
If seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output:
1) dd bs=1 skip output of each 2nd elements
$ dd if=/sys/fs/cgroup/cgroup.procs bs=8 count=1
2
3
4
5
1+0 records in
1+0 records out
8 bytes copied, 0,000267297 s, 29,9 kB/s
[test@localhost ~]$ dd if=/sys/fs/cgroup/cgroup.procs bs=1 count=8
2
4 <<< NB! 3 was skipped
6 <<< ... and 5 too
8 <<< ... and 7
8+0 records in
8+0 records out
8 bytes copied, 5,2123e-05 s, 153 kB/s
This happen because __cgroup_procs_start() makes an extra
extra cgroup_procs_next() call
2) read after lseek beyond end of file generates whole last line.
3) read after lseek into middle of last line generates
expected rest of last line and unexpected whole line once again.
Additionally patch removes an extra position index changes in
__cgroup_procs_start()
Cc: stable@vger.kernel.orghttps://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit e876ecc67d ]
We are testing network memory accounting in our setup and noticed
inconsistent network memory usage and often unrelated cgroups network
usage correlates with testing workload. On further inspection, it
seems like mem_cgroup_sk_alloc() and cgroup_sk_alloc() are broken in
irq context specially for cgroup v1.
mem_cgroup_sk_alloc() and cgroup_sk_alloc() can be called in irq context
and kind of assumes that this can only happen from sk_clone_lock()
and the source sock object has already associated cgroup. However in
cgroup v1, where network memory accounting is opt-in, the source sock
can be unassociated with any cgroup and the new cloned sock can get
associated with unrelated interrupted cgroup.
Cgroup v2 can also suffer if the source sock object was created by
process in the root cgroup or if sk_alloc() is called in irq context.
The fix is to just do nothing in interrupt.
WARNING: Please note that about half of the TCP sockets are allocated
from the IRQ context, so, memory used by such sockets will not be
accouted by the memcg.
The stack trace of mem_cgroup_sk_alloc() from IRQ-context:
CPU: 70 PID: 12720 Comm: ssh Tainted: 5.6.0-smp-DEV #1
Hardware name: ...
Call Trace:
<IRQ>
dump_stack+0x57/0x75
mem_cgroup_sk_alloc+0xe9/0xf0
sk_clone_lock+0x2a7/0x420
inet_csk_clone_lock+0x1b/0x110
tcp_create_openreq_child+0x23/0x3b0
tcp_v6_syn_recv_sock+0x88/0x730
tcp_check_req+0x429/0x560
tcp_v6_rcv+0x72d/0xa40
ip6_protocol_deliver_rcu+0xc9/0x400
ip6_input+0x44/0xd0
? ip6_protocol_deliver_rcu+0x400/0x400
ip6_rcv_finish+0x71/0x80
ipv6_rcv+0x5b/0xe0
? ip6_sublist_rcv+0x2e0/0x2e0
process_backlog+0x108/0x1e0
net_rx_action+0x26b/0x460
__do_softirq+0x104/0x2a6
do_softirq_own_stack+0x2a/0x40
</IRQ>
do_softirq.part.19+0x40/0x50
__local_bh_enable_ip+0x51/0x60
ip6_finish_output2+0x23d/0x520
? ip6table_mangle_hook+0x55/0x160
__ip6_finish_output+0xa1/0x100
ip6_finish_output+0x30/0xd0
ip6_output+0x73/0x120
? __ip6_finish_output+0x100/0x100
ip6_xmit+0x2e3/0x600
? ipv6_anycast_cleanup+0x50/0x50
? inet6_csk_route_socket+0x136/0x1e0
? skb_free_head+0x1e/0x30
inet6_csk_xmit+0x95/0xf0
__tcp_transmit_skb+0x5b4/0xb20
__tcp_send_ack.part.60+0xa3/0x110
tcp_send_ack+0x1d/0x20
tcp_rcv_state_process+0xe64/0xe80
? tcp_v6_connect+0x5d1/0x5f0
tcp_v6_do_rcv+0x1b1/0x3f0
? tcp_v6_do_rcv+0x1b1/0x3f0
__release_sock+0x7f/0xd0
release_sock+0x30/0xa0
__inet_stream_connect+0x1c3/0x3b0
? prepare_to_wait+0xb0/0xb0
inet_stream_connect+0x3b/0x60
__sys_connect+0x101/0x120
? __sys_getsockopt+0x11b/0x140
__x64_sys_connect+0x1a/0x20
do_syscall_64+0x51/0x200
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The stack trace of mem_cgroup_sk_alloc() from IRQ-context:
Fixes: 2d75807383 ("mm: memcontrol: consolidate cgroup socket tracking")
Fixes: d979a39d72 ("cgroup: duplicate cgroup reference when cloning sockets")
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PF_EXITING is set earlier than actual removal from css_set when a task
is exitting. This can confuse cgroup.procs readers who see no PF_EXITING
tasks, however, rmdir is checking against css_set membership so it can
transitionally fail with EBUSY.
Fix this by listing tasks that weren't unlinked from css_set active
lists.
It may happen that other users of the task iterator (without
CSS_TASK_ITER_PROCS) spot a PF_EXITING task before cgroup_exit(). This
is equal to the state before commit c03cd7738a ("cgroup: Include dying
leaders with live threads in PROCS iterations") but it may be reviewed
later.
Reported-by: Suren Baghdasaryan <surenb@google.com>
Fixes: c03cd7738a ("cgroup: Include dying leaders with live threads in PROCS iterations")
Signed-off-by: Michal Koutný <mkoutny@suse.com>
(cherry picked from commit 9c974c7724)
Bug: 141213848
Bug: 146758430
Test: test_cgcore_destroy from linux-kselftest
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: Iac57661b931129ed1e44b89675f8115bb89084ff
(cherry picked from commit 21ee296526c70d6dc3c64639406f156f39b80fd0)
The current DMA coherent pool assumes that there is a kernel
mapping at all times for the entire pool. This may not be
what we want for the entire times. Add the dma_removed ops to
support this use case.
Bug: 145617272
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org>
[surenb Squashed the following commits:
a478a8bf78ad "drivers: Add dma removed ops"
8510985ae320 "dma: removed: Merge dma removed changes from 4.14"
and removed-dma-pool driver changes from
9d4b7d641556 "iommu: arm-smmu: Merge for ..."]
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: Ie4f1e9bdf57b79699fa8fa7e7a6087e6d88ebbfa
kallsyms_lookup_name() and kallsyms_on_each_symbol() are exported to
modules despite having no in-tree users and being wide open to abuse by
out-of-tree modules that can use them as a method to invoke arbitrary
non-exported kernel functions.
Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol().
Bug: 149978696
Change-Id: I8f3c1b5222939c46901f4d149d4c7bb63916ff04
Link: http://lkml.kernel.org/r/20200221114404.14641-4-will@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Quentin Perret <qperret@google.com>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Miroslav Benes <mbenes@suse.cz>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit ab3e66797c7fddbf80fbba31c5bf4574ad52f320
https://github.com/hnaz/linux-mm.git master)
Signed-off-by: Quentin Perret <qperret@google.com>
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Merge 4.19.109 into android-4.19
Changes in 4.19.109
EDAC/amd64: Set grain per DIMM
ALSA: hda/realtek - Fix a regression for mute led on Lenovo Carbon X1
net: dsa: bcm_sf2: Forcibly configure IMP port for 1Gb/sec
RDMA/core: Fix pkey and port assignment in get_new_pps
RDMA/core: Fix use of logical OR in get_new_pps
kprobes: Fix optimize_kprobe()/unoptimize_kprobe() cancellation logic
ALSA: hda: do not override bus codec_mask in link_get()
serial: ar933x_uart: set UART_CS_{RX,TX}_READY_ORIDE
selftests: fix too long argument
usb: gadget: composite: Support more than 500mA MaxPower
usb: gadget: ffs: ffs_aio_cancel(): Save/restore IRQ flags
usb: gadget: serial: fix Tx stall after buffer overflow
drm/msm/mdp5: rate limit pp done timeout warnings
drm: msm: Fix return type of dsi_mgr_connector_mode_valid for kCFI
scsi: megaraid_sas: silence a warning
drm/msm/dsi: save pll state before dsi host is powered off
drm/msm/dsi/pll: call vco set rate explicitly
selftests: forwarding: use proto icmp for {gretap, ip6gretap}_mac testing
net: dsa: b53: Ensure the default VID is untagged
net: ks8851-ml: Remove 8-bit bus accessors
net: ks8851-ml: Fix 16-bit data access
net: ks8851-ml: Fix 16-bit IO operation
watchdog: da9062: do not ping the hw during stop()
s390/cio: cio_ignore_proc_seq_next should increase position index
s390: make 'install' not depend on vmlinux
x86/boot/compressed: Don't declare __force_order in kaslr_64.c
s390/qdio: fill SL with absolute addresses
nvme: Fix uninitialized-variable warning
ice: Don't tell the OS that link is going down
x86/xen: Distribute switch variables for initialization
net: thunderx: workaround BGX TX Underflow issue
ALSA: hda/realtek - Add Headset Mic supported
ALSA: hda/realtek - Fix silent output on Gigabyte X570 Aorus Master
cifs: don't leak -EAGAIN for stat() during reconnect
usb: storage: Add quirk for Samsung Fit flash
usb: quirks: add NO_LPM quirk for Logitech Screen Share
usb: dwc3: gadget: Update chain bit correctly when using sg list
usb: core: hub: fix unhandled return by employing a void function
usb: core: hub: do error out if usb_autopm_get_interface() fails
usb: core: port: do error out if usb_autopm_get_interface() fails
vgacon: Fix a UAF in vgacon_invert_region
mm, numa: fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa
mm: fix possible PMD dirty bit lost in set_pmd_migration_entry()
fat: fix uninit-memory access for partial initialized inode
arm: dts: dra76x: Fix mmc3 max-frequency
tty:serial:mvebu-uart:fix a wrong return
serial: 8250_exar: add support for ACCES cards
vt: selection, close sel_buffer race
vt: selection, push console lock down
vt: selection, push sel_lock up
media: v4l2-mem2mem.c: fix broken links
x86/pkeys: Manually set X86_FEATURE_OSPKE to preserve existing changes
dmaengine: tegra-apb: Fix use-after-free
dmaengine: tegra-apb: Prevent race conditions of tasklet vs free list
dm cache: fix a crash due to incorrect work item cancelling
dm: report suspended device during destroy
dm writecache: verify watermark during resume
ARM: dts: ls1021a: Restore MDIO compatible to gianfar
spi: bcm63xx-hsspi: Really keep pll clk enabled
ASoC: topology: Fix memleak in soc_tplg_link_elems_load()
ASoC: topology: Fix memleak in soc_tplg_manifest_load()
ASoC: intel: skl: Fix pin debug prints
ASoC: intel: skl: Fix possible buffer overflow in debug outputs
dmaengine: imx-sdma: remove dma_slave_config direction usage and leave sdma_event_enable()
ASoC: pcm: Fix possible buffer overflow in dpcm state sysfs output
ASoC: pcm512x: Fix unbalanced regulator enable call in probe error path
ASoC: dapm: Correct DAPM handling of active widgets during shutdown
drm/sun4i: Fix DE2 VI layer format support
drm/sun4i: de2/de3: Remove unsupported VI layer formats
phy: mapphone-mdm6600: Fix timeouts by adding wake-up handling
phy: mapphone-mdm6600: Fix write timeouts with shorter GPIO toggle interval
ARM: dts: imx6: phycore-som: fix emmc supply
RDMA/iwcm: Fix iwcm work deallocation
RMDA/cm: Fix missing ib_cm_destroy_id() in ib_cm_insert_listen()
IB/hfi1, qib: Ensure RCU is locked when accessing list
ARM: imx: build v7_cpu_resume() unconditionally
ARM: dts: am437x-idk-evm: Fix incorrect OPP node names
ARM: dts: imx7-colibri: Fix frequency for sd/mmc
hwmon: (adt7462) Fix an error return in ADT7462_REG_VOLT()
dmaengine: coh901318: Fix a double lock bug in dma_tc_handle()
powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems
efi/x86: Align GUIDs to their size in the mixed mode runtime wrapper
efi/x86: Handle by-ref arguments covering multiple pages in mixed mode
dm integrity: fix a deadlock due to offloading to an incorrect workqueue
scsi: pm80xx: Fixed kernel panic during error recovery for SATA drive
Linux 4.19.109
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Iae5cc72b8c7c96b0a15c76657b9c3bcc4341a7aa
[ Upstream commit e4add24778 ]
optimize_kprobe() and unoptimize_kprobe() cancels if a given kprobe
is on the optimizing_list or unoptimizing_list already. However, since
the following commit:
f66c0447cc ("kprobes: Set unoptimized flag after unoptimizing code")
modified the update timing of the KPROBE_FLAG_OPTIMIZED, it doesn't
work as expected anymore.
The optimized_kprobe could be in the following states:
- [optimizing]: Before inserting jump instruction
op.kp->flags has KPROBE_FLAG_OPTIMIZED and
op->list is not empty.
- [optimized]: jump inserted
op.kp->flags has KPROBE_FLAG_OPTIMIZED and
op->list is empty.
- [unoptimizing]: Before removing jump instruction (including unused
optprobe)
op.kp->flags has KPROBE_FLAG_OPTIMIZED and
op->list is not empty.
- [unoptimized]: jump removed
op.kp->flags doesn't have KPROBE_FLAG_OPTIMIZED and
op->list is empty.
Current code mis-expects [unoptimizing] state doesn't have
KPROBE_FLAG_OPTIMIZED, and that can cause incorrect results.
To fix this, introduce optprobe_queued_unopt() to distinguish [optimizing]
and [unoptimizing] states and fixes the logic in optimize_kprobe() and
unoptimize_kprobe().
[ mingo: Cleaned up the changelog and the code a bit. ]
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bristot@redhat.com
Fixes: f66c0447cc ("kprobes: Set unoptimized flag after unoptimizing code")
Link: https://lkml.kernel.org/r/157840814418.7181.13478003006386303481.stgit@devnote2
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
We want to allow compiling irqchip drivers as modules. So export the
necessary symbols.
Bug: 148105066
Change-Id: Id3de4b8451bed1af9b0afeb5863493697730acb6
Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Will McVicker <willmcvicker@google.com>
(cherry picked from commit cfc69e9b2fe82a46addfcb1912bd642456548baa)
These symbols are needed for modularizing pinctrl.
Signed-off-by: Will McVicker <willmcvicker@google.com>
Bug: 145771121
Test: compile, boot
Change-Id: I8693c3a41b5fcab05b8e4a8a82f4057205bafd3b
(cherry picked from commit 9d2cbb36a60747e885f77d776a3ec2bf7523e2e6)
On certain QTI chipsets some GPIOs are direct-connect interrupts
to the GIC.
Even when GPIOs are not used for interrupt generation and interrupt
line is disabled, it does not prevent interrupt to get pending at
GIC_ISPEND. When drivers call enable_irq unwanted interrupt occures.
Introduce irq_chip_get/set_parent_state calls to clear pending irq
which can get called within irq_enable of child irq chip to clear
any pending irq before enabling.
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Bug: 150233439
Change-Id: Ie8559657bd8da926cc741514809ffe9adbd73a80
Signed-off-by: Will McVicker <willmcvicker@google.com>
(cherry picked from commit d9233146224bdeec6a8a4cc684bec303e38fb9af)
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Merge 4.19.108 into android-4.19
Changes in 4.19.108
irqchip/gic-v3-its: Fix misuse of GENMASK macro
iwlwifi: pcie: fix rb_allocator workqueue allocation
ipmi:ssif: Handle a possible NULL pointer reference
drm/msm: Set dma maximum segment size for mdss
dax: pass NOWAIT flag to iomap_apply
mac80211: consider more elements in parsing CRC
cfg80211: check wiphy driver existence for drvinfo report
s390/zcrypt: fix card and queue total counter wrap
qmi_wwan: re-add DW5821e pre-production variant
qmi_wwan: unconditionally reject 2 ep interfaces
ARM: dts: sti: fixup sound frame-inversion for stihxxx-b2120.dtsi
soc/tegra: fuse: Fix build with Tegra194 configuration
net: ena: fix potential crash when rxfh key is NULL
net: ena: fix uses of round_jiffies()
net: ena: add missing ethtool TX timestamping indication
net: ena: fix incorrect default RSS key
net: ena: rss: fix failure to get indirection table
net: ena: rss: store hash function as values and not bits
net: ena: fix incorrectly saving queue numbers when setting RSS indirection table
net: ena: ethtool: use correct value for crc32 hash
net: ena: ena-com.c: prevent NULL pointer dereference
cifs: Fix mode output in debugging statements
cfg80211: add missing policy for NL80211_ATTR_STATUS_CODE
sysrq: Restore original console_loglevel when sysrq disabled
sysrq: Remove duplicated sysrq message
net: fib_rules: Correctly set table field when table number exceeds 8 bits
net: mscc: fix in frame extraction
net: phy: restore mdio regs in the iproc mdio driver
net: sched: correct flower port blocking
nfc: pn544: Fix occasional HW initialization failure
sctp: move the format error check out of __sctp_sf_do_9_1_abort
ipv6: Fix route replacement with dev-only route
ipv6: Fix nlmsg_flags when splitting a multipath route
qede: Fix race between rdma destroy workqueue and link change event
net/tls: Fix to avoid gettig invalid tls record
ext4: potential crash on allocation error in ext4_alloc_flex_bg_array()
audit: fix error handling in audit_data_to_entry()
ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro
ACPI: watchdog: Fix gas->access_width usage
KVM: VMX: check descriptor table exits on instruction emulation
HID: ite: Only bind to keyboard USB interface on Acer SW5-012 keyboard dock
HID: core: fix off-by-one memset in hid_report_raw_event()
HID: core: increase HID report buffer size to 8KiB
macintosh: therm_windtunnel: fix regression when instantiating devices
tracing: Disable trace_printk() on post poned tests
Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs"
amdgpu/gmc_v9: save/restore sdpif regs during S3
vhost: Check docket sk_family instead of call getname
HID: alps: Fix an error handling path in 'alps_input_configured()'
HID: hiddev: Fix race in in hiddev_disconnect()
MIPS: VPE: Fix a double free and a memory leak in 'release_vpe()'
i2c: altera: Fix potential integer overflow
i2c: jz4780: silence log flood on txabrt
drm/i915/gvt: Fix orphan vgpu dmabuf_objs' lifetime
drm/i915/gvt: Separate display reset from ALL_ENGINES reset
hv_netvsc: Fix unwanted wakeup in netvsc_attach()
usb: charger: assign specific number for enum value
s390/qeth: vnicc Fix EOPNOTSUPP precedence
net: netlink: cap max groups which will be considered in netlink_bind()
net: atlantic: fix use after free kasan warn
net: atlantic: fix potential error handling
net/smc: no peer ID in CLC decline for SMCD
net: ena: make ena rxfh support ETH_RSS_HASH_NO_CHANGE
namei: only return -ECHILD from follow_dotdot_rcu()
mwifiex: drop most magic numbers from mwifiex_process_tdls_action_frame()
mwifiex: delete unused mwifiex_get_intf_num()
KVM: SVM: Override default MMIO mask if memory encryption is enabled
KVM: Check for a bad hva before dropping into the ghc slow path
sched/fair: Optimize update_blocked_averages()
sched/fair: Fix O(nr_cgroups) in the load balancing path
perf stat: Use perf_evsel__is_clocki() for clock events
perf stat: Fix shadow stats for clock events
drivers: net: xgene: Fix the order of the arguments of 'alloc_etherdev_mqs()'
kprobes: Set unoptimized flag after unoptimizing code
pwm: omap-dmtimer: put_device() after of_find_device_by_node()
perf hists browser: Restore ESC as "Zoom out" of DSO/thread/etc
KVM: x86: Remove spurious kvm_mmu_unload() from vcpu destruction path
KVM: x86: Remove spurious clearing of async #PF MSR
thermal: brcmstb_thermal: Do not use DT coefficients
netfilter: nft_tunnel: no need to call htons() when dumping ports
netfilter: nf_flowtable: fix documentation
mm/huge_memory.c: use head to check huge zero page
mm, thp: fix defrag setting if newline is not used
audit: always check the netlink payload length in audit_receive_msg()
Linux 4.19.108
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ib98db500eded0a83d89c38900bbdf9ff5d6a37e0
commit f66c0447cc upstream.
Set the unoptimized flag after confirming the code is completely
unoptimized. Without this fix, when a kprobe hits the intermediate
modified instruction (the first byte is replaced by an INT3, but
later bytes can still be a jump address operand) while unoptimizing,
it can return to the middle byte of the modified code, which causes
an invalid instruction exception in the kernel.
Usually, this is a rare case, but if we put a probe on the function
call while text patching, it always causes a kernel panic as below:
# echo p text_poke+5 > kprobe_events
# echo 1 > events/kprobes/enable
# echo 0 > events/kprobes/enable
invalid opcode: 0000 [#1] PREEMPT SMP PTI
RIP: 0010:text_poke+0x9/0x50
Call Trace:
arch_unoptimize_kprobe+0x22/0x28
arch_unoptimize_kprobes+0x39/0x87
kprobe_optimizer+0x6e/0x290
process_one_work+0x2a0/0x610
worker_thread+0x28/0x3d0
? process_one_work+0x610/0x610
kthread+0x10d/0x130
? kthread_park+0x80/0x80
ret_from_fork+0x3a/0x50
text_poke() is used for patching the code in optprobes.
This can happen even if we blacklist text_poke() and other functions,
because there is a small time window during which we show the intermediate
code to other CPUs.
[ mingo: Edited the changelog. ]
Tested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bristot@redhat.com
Fixes: 6274de4984 ("kprobes: Support delayed unoptimizing")
Link: https://lkml.kernel.org/r/157483422375.25881.13508326028469515760.stgit@devnote2
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 039ae8bcf7 upstream.
This re-applies the commit reverted here:
commit c40f7d74c7 ("sched/fair: Fix infinite loop in update_blocked_averages() by reverting a9e7f6544b")
I.e. now that cfs_rq can be safely removed/added in the list, we can re-apply:
commit a9e7f6544b ("sched/fair: Fix O(nr_cgroups) in load balance path")
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: sargun@sargun.me
Cc: tj@kernel.org
Cc: xiexiuqi@huawei.com
Cc: xiezhipeng1@huawei.com
Link: https://lkml.kernel.org/r/1549469662-13614-3-git-send-email-vincent.guittot@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Vishnu Rangayyan <vishnu.rangayyan@apple.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 31bc6aeaab upstream.
Removing a cfs_rq from rq->leaf_cfs_rq_list can break the parent/child
ordering of the list when it will be added back. In order to remove an
empty and fully decayed cfs_rq, we must remove its children too, so they
will be added back in the right order next time.
With a normal decay of PELT, a parent will be empty and fully decayed
if all children are empty and fully decayed too. In such a case, we just
have to ensure that the whole branch will be added when a new task is
enqueued. This is default behavior since :
commit f678331973 ("sched/fair: Fix insertion in rq->leaf_cfs_rq_list")
In case of throttling, the PELT of throttled cfs_rq will not be updated
whereas the parent will. This breaks the assumption made above unless we
remove the children of a cfs_rq that is throttled. Then, they will be
added back when unthrottled and a sched_entity will be enqueued.
As throttled cfs_rq are now removed from the list, we can remove the
associated test in update_blocked_averages().
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: sargun@sargun.me
Cc: tj@kernel.org
Cc: xiexiuqi@huawei.com
Cc: xiezhipeng1@huawei.com
Link: https://lkml.kernel.org/r/1549469662-13614-2-git-send-email-vincent.guittot@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Vishnu Rangayyan <vishnu.rangayyan@apple.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 78041c0c9e upstream.
The tracing seftests checks various aspects of the tracing infrastructure,
and one is filtering. If trace_printk() is active during a self test, it can
cause the filtering to fail, which will disable that part of the trace.
To keep the selftests from failing because of trace_printk() calls,
trace_printk() checks the variable tracing_selftest_running, and if set, it
does not write to the tracing buffer.
As some tracers were registered earlier in boot, the selftest they triggered
would fail because not all the infrastructure was set up for the full
selftest. Thus, some of the tests were post poned to when their
infrastructure was ready (namely file system code). The postpone code did
not set the tracing_seftest_running variable, and could fail if a
trace_printk() was added and executed during their run.
Cc: stable@vger.kernel.org
Fixes: 9afecfbb95 ("tracing: Postpone tracer start-up tests till the system is more robust")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 2ad3e17ebf upstream.
Commit 219ca39427 ("audit: use union for audit_field values since
they are mutually exclusive") combined a number of separate fields in
the audit_field struct into a single union. Generally this worked
just fine because they are generally mutually exclusive.
Unfortunately in audit_data_to_entry() the overlap can be a problem
when a specific error case is triggered that causes the error path
code to attempt to cleanup an audit_field struct and the cleanup
involves attempting to free a stored LSM string (the lsm_str field).
Currently the code always has a non-NULL value in the
audit_field.lsm_str field as the top of the for-loop transfers a
value into audit_field.val (both .lsm_str and .val are part of the
same union); if audit_data_to_entry() fails and the audit_field
struct is specified to contain a LSM string, but the
audit_field.lsm_str has not yet been properly set, the error handling
code will attempt to free the bogus audit_field.lsm_str value that
was set with audit_field.val at the top of the for-loop.
This patch corrects this by ensuring that the audit_field.val is only
set when needed (it is cleared when the audit_field struct is
allocated with kcalloc()). It also corrects a few other issues to
ensure that in case of error the proper error code is returned.
Cc: stable@vger.kernel.org
Fixes: 219ca39427 ("audit: use union for audit_field values since they are mutually exclusive")
Reported-by: syzbot+1f4d90ead370d72e450b@syzkaller.appspotmail.com
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
An external fragmentation event was previously described as
When the page allocator fragments memory, it records the event using
the mm_page_alloc_extfrag event. If the fallback_order is smaller
than a pageblock order (order-9 on 64-bit x86) then it's considered
an event that will cause external fragmentation issues in the future.
The kernel reduces the probability of such events by increasing the
watermark sizes by calling set_recommended_min_free_kbytes early in the
lifetime of the system. This works reasonably well in general but if
there are enough sparsely populated pageblocks then the problem can still
occur as enough memory is free overall and kswapd stays asleep.
This patch introduces a watermark_boost_factor sysctl that allows a zone
watermark to be temporarily boosted when an external fragmentation causing
events occurs. The boosting will stall allocations that would decrease
free memory below the boosted low watermark and kswapd is woken if the
calling context allows to reclaim an amount of memory relative to the size
of the high watermark and the watermark_boost_factor until the boost is
cleared. When kswapd finishes, it wakes kcompactd at the pageblock order
to clean some of the pageblocks that may have been affected by the
fragmentation event. kswapd avoids any writeback, slab shrinkage and swap
from reclaim context during this operation to avoid excessive system
disruption in the name of fragmentation avoidance. Care is taken so that
kswapd will do normal reclaim work if the system is really low on memory.
This was evaluated using the same workloads as "mm, page_alloc: Spread
allocations across zones before introducing fragmentation".
1-socket Skylake machine
config-global-dhp__workload_thpfioscale XFS (no special madvise)
4 fio threads, 1 THP allocating thread
--------------------------------------
4.20-rc3 extfrag events < order 9: 804694
4.20-rc3+patch: 408912 (49% reduction)
4.20-rc3+patch1-4: 18421 (98% reduction)
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Amean fault-base-1 653.58 ( 0.00%) 652.71 ( 0.13%)
Amean fault-huge-1 0.00 ( 0.00%) 178.93 * -99.00%*
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Percentage huge-1 0.00 ( 0.00%) 5.12 ( 100.00%)
Note that external fragmentation causing events are massively reduced by
this path whether in comparison to the previous kernel or the vanilla
kernel. The fault latency for huge pages appears to be increased but that
is only because THP allocations were successful with the patch applied.
1-socket Skylake machine
global-dhp__workload_thpfioscale-madvhugepage-xfs (MADV_HUGEPAGE)
-----------------------------------------------------------------
4.20-rc3 extfrag events < order 9: 291392
4.20-rc3+patch: 191187 (34% reduction)
4.20-rc3+patch1-4: 13464 (95% reduction)
thpfioscale Fault Latencies
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Min fault-base-1 912.00 ( 0.00%) 905.00 ( 0.77%)
Min fault-huge-1 127.00 ( 0.00%) 135.00 ( -6.30%)
Amean fault-base-1 1467.55 ( 0.00%) 1481.67 ( -0.96%)
Amean fault-huge-1 1127.11 ( 0.00%) 1063.88 * 5.61%*
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Percentage huge-1 77.64 ( 0.00%) 83.46 ( 7.49%)
As before, massive reduction in external fragmentation events, some jitter
on latencies and an increase in THP allocation success rates.
2-socket Haswell machine
config-global-dhp__workload_thpfioscale XFS (no special madvise)
4 fio threads, 5 THP allocating threads
----------------------------------------------------------------
4.20-rc3 extfrag events < order 9: 215698
4.20-rc3+patch: 200210 (7% reduction)
4.20-rc3+patch1-4: 14263 (93% reduction)
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Amean fault-base-5 1346.45 ( 0.00%) 1306.87 ( 2.94%)
Amean fault-huge-5 3418.60 ( 0.00%) 1348.94 ( 60.54%)
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Percentage huge-5 0.78 ( 0.00%) 7.91 ( 910.64%)
There is a 93% reduction in fragmentation causing events, there is a big
reduction in the huge page fault latency and allocation success rate is
higher.
2-socket Haswell machine
global-dhp__workload_thpfioscale-madvhugepage-xfs (MADV_HUGEPAGE)
-----------------------------------------------------------------
4.20-rc3 extfrag events < order 9: 166352
4.20-rc3+patch: 147463 (11% reduction)
4.20-rc3+patch1-4: 11095 (93% reduction)
thpfioscale Fault Latencies
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Amean fault-base-5 6217.43 ( 0.00%) 7419.67 * -19.34%*
Amean fault-huge-5 3163.33 ( 0.00%) 3263.80 ( -3.18%)
4.20.0-rc3 4.20.0-rc3
lowzone-v5r8 boost-v5r8
Percentage huge-5 95.14 ( 0.00%) 87.98 ( -7.53%)
There is a large reduction in fragmentation events with some jitter around
the latencies and success rates. As before, the high THP allocation
success rate does mean the system is under a lot of pressure. However, as
the fragmentation events are reduced, it would be expected that the
long-term allocation success rate would be higher.
Link: http://lkml.kernel.org/r/20181123114528.28802-5-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Zi Yan <zi.yan@cs.rutgers.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: Ied06272defcdbf3fff07b7ebccb46c68ce081e1e
Git-commit: 1c30844d2d
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
[vinmenon@codeaurora.org: trivial merge conflict fixes]
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
(cherry picked from commit 1c30844d2d)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 150378964
The check to ensure that the new written value into cpu.uclamp.{min,max}
is within range, [0:100], wasn't working because of the signed
comparison
7301 if (req.percent > UCLAMP_PERCENT_SCALE) {
7302 req.ret = -ERANGE;
7303 return req;
7304 }
# echo -1 > cpu.uclamp.min
# cat cpu.uclamp.min
42949671.96
Cast req.percent into u64 to force the comparison to be unsigned and
work as intended in capacity_from_percent().
# echo -1 > cpu.uclamp.min
sh: write error: Numerical result out of range
Bug: 120440300
Fixes: 2480c09313 ("sched/uclamp: Extend CPU's cgroup controller")
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200114210947.14083-1-qais.yousef@arm.com
(cherry picked from commit b562d14064)
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: I17fc2b119dcbffb212e130ed2c37ae3a8d5bbb61
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Merge 4.19.107 into android-4.19
Changes in 4.19.107
iommu/qcom: Fix bogus detach logic
ALSA: hda: Use scnprintf() for printing texts for sysfs/procfs
ALSA: hda/realtek - Apply quirk for MSI GP63, too
ALSA: hda/realtek - Apply quirk for yet another MSI laptop
ASoC: sun8i-codec: Fix setting DAI data format
ecryptfs: fix a memory leak bug in parse_tag_1_packet()
ecryptfs: fix a memory leak bug in ecryptfs_init_messaging()
thunderbolt: Prevent crash if non-active NVMem file is read
USB: misc: iowarrior: add support for 2 OEMed devices
USB: misc: iowarrior: add support for the 28 and 28L devices
USB: misc: iowarrior: add support for the 100 device
floppy: check FDC index for errors before assigning it
vt: fix scrollback flushing on background consoles
vt: selection, handle pending signals in paste_selection
vt: vt_ioctl: fix race in VT_RESIZEX
staging: android: ashmem: Disallow ashmem memory from being remapped
staging: vt6656: fix sign of rx_dbm to bb_pre_ed_rssi.
xhci: Force Maximum Packet size for Full-speed bulk devices to valid range.
xhci: fix runtime pm enabling for quirky Intel hosts
xhci: Fix memory leak when caching protocol extended capability PSI tables - take 2
usb: host: xhci: update event ring dequeue pointer on purpose
USB: core: add endpoint-blacklist quirk
USB: quirks: blacklist duplicate ep on Sound Devices USBPre2
usb: uas: fix a plug & unplug racing
USB: Fix novation SourceControl XL after suspend
USB: hub: Don't record a connect-change event during reset-resume
USB: hub: Fix the broken detection of USB3 device in SMSC hub
usb: dwc2: Fix SET/CLEAR_FEATURE and GET_STATUS flows
usb: dwc3: gadget: Check for IOC/LST bit in TRB->ctrl fields
staging: rtl8188eu: Fix potential security hole
staging: rtl8188eu: Fix potential overuse of kernel memory
staging: rtl8723bs: Fix potential security hole
staging: rtl8723bs: Fix potential overuse of kernel memory
powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery
jbd2: fix ocfs2 corrupt when clearing block group bits
x86/mce/amd: Publish the bank pointer only after setup has succeeded
x86/mce/amd: Fix kobject lifetime
x86/cpu/amd: Enable the fixed Instructions Retired counter IRPERF
serial: 8250: Check UPF_IRQ_SHARED in advance
tty/serial: atmel: manage shutdown in case of RS485 or ISO7816 mode
tty: serial: imx: setup the correct sg entry for tx dma
serdev: ttyport: restore client ops on deregistration
MAINTAINERS: Update drm/i915 bug filing URL
Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()"
mm/memcontrol.c: lost css_put in memcg_expand_shrinker_maps()
nvme-multipath: Fix memory leak with ana_log_buf
genirq/irqdomain: Make sure all irq domain flags are distinct
mm/vmscan.c: don't round up scan size for online memory cgroup
drm/amdgpu/soc15: fix xclk for raven
xhci: apply XHCI_PME_STUCK_QUIRK to Intel Comet Lake platforms
KVM: nVMX: Don't emulate instructions in guest mode
KVM: x86: don't notify userspace IOAPIC on edge-triggered interrupt EOI
tty: serial: qcom_geni_serial: Fix UART hang
tty: serial: qcom_geni_serial: Remove interrupt storm
tty: serial: qcom_geni_serial: Remove use of *_relaxed() and mb()
tty: serial: qcom_geni_serial: Remove set_rfr_wm() and related variables
tty: serial: qcom_geni_serial: Remove xfer_mode variable
tty: serial: qcom_geni_serial: Fix RX cancel command failure
lib/stackdepot.c: fix global out-of-bounds in stack_slabs
drm/nouveau/kms/gv100-: Re-set LUT after clearing for modesets
ext4: fix a data race in EXT4_I(inode)->i_disksize
ext4: add cond_resched() to __ext4_find_entry()
ext4: fix potential race between online resizing and write operations
ext4: fix potential race between s_group_info online resizing and access
ext4: fix potential race between s_flex_groups online resizing and access
ext4: fix mount failure with quota configured as module
ext4: rename s_journal_flag_rwsem to s_writepages_rwsem
ext4: fix race between writepages and enabling EXT4_EXTENTS_FL
KVM: nVMX: Refactor IO bitmap checks into helper function
KVM: nVMX: Check IO instruction VM-exit conditions
KVM: nVMX: handle nested posted interrupts when apicv is disabled for L1
KVM: apic: avoid calculating pending eoi from an uninitialized val
btrfs: fix bytes_may_use underflow in prealloc error condtition
btrfs: reset fs_root to NULL on error in open_ctree
btrfs: do not check delayed items are empty for single transaction cleanup
Btrfs: fix btrfs_wait_ordered_range() so that it waits for all ordered extents
Revert "dmaengine: imx-sdma: Fix memory leak"
scsi: Revert "RDMA/isert: Fix a recently introduced regression related to logout"
scsi: Revert "target: iscsi: Wait for all commands to finish before freeing a session"
usb: gadget: composite: Fix bMaxPower for SuperSpeedPlus
usb: dwc2: Fix in ISOC request length checking
staging: rtl8723bs: fix copy of overlapping memory
staging: greybus: use after free in gb_audio_manager_remove_all()
ecryptfs: replace BUG_ON with error handling code
iommu/vt-d: Fix compile warning from intel-svm.h
genirq/proc: Reject invalid affinity masks (again)
bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill
ALSA: rawmidi: Avoid bit fields for state flags
ALSA: seq: Avoid concurrent access to queue flags
ALSA: seq: Fix concurrent access to queue current tick/time
netfilter: xt_hashlimit: limit the max size of hashtable
rxrpc: Fix call RCU cleanup using non-bh-safe locks
ata: ahci: Add shutdown to freeze hardware resources of ahci
xen: Enable interrupts when calling _cond_resched()
s390/mm: Explicitly compare PAGE_DEFAULT_KEY against zero in storage_key_init_range
Revert "char/random: silence a lockdep splat with printk()"
Linux 4.19.107
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I74e3d49c54d4afcfa4049042163cb879c3de3100
Kelly Rossmoyer