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Gustavo A. R. Silva d3faea2d15 char/mwave: fix potential Spectre v1 vulnerability 
commit 701956d401 upstream.

ipcnum is indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.

This issue was detected with the help of Smatch:

drivers/char/mwave/mwavedd.c:299 mwave_ioctl() warn: potential spectre issue 'pDrvData->IPCs' [w] (local cap)

Fix this by sanitizing ipcnum before using it to index pDrvData->IPCs.

Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].

[1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2

Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-31 08:14:36 +01:00
..
accessibility
acpi ACPI/IORT: Fix rc_dma_get_range() 2019-01-16 22:04:34 +01:00
amba
android binder: fix race that allows malicious free of live buffer 2018-12-05 19:32:11 +01:00
ata libata: whitelist all SAMSUNG MZ7KM* solid-state disks 2018-12-21 14:15:20 +01:00
atm
auxdisplay auxdisplay: charlcd: fix x/y command parsing 2019-01-13 09:51:03 +01:00
base sysfs: Disable lockdep for driver bind/unbind files 2019-01-26 09:32:42 +01:00
bcma
block nbd: Use set_blocksize() to set device blocksize 2019-01-22 21:40:38 +01:00
bluetooth Bluetooth: btusb: Add support for Intel bluetooth device 8087:0029 2019-01-26 09:32:42 +01:00
bus Merge branch 'perm-fix' into omap-for-v4.19/fixes-v2 2018-08-28 09:58:03 -07:00
cdrom cdrom: fix improper type cast, which can leat to information leak. 2018-11-21 09:19:12 +01:00
char char/mwave: fix potential Spectre v1 vulnerability 2019-01-31 08:14:36 +01:00
clk clk: socfpga: stratix10: fix naming convention for the fixed-clocks 2019-01-31 08:14:34 +01:00
clocksource clocksource/drivers/integrator-ap: Add missing of_node_put() 2019-01-26 09:32:42 +01:00
connector
cpufreq cpufreq: scmi: Fix frequency invariance in slow path 2019-01-16 22:04:29 +01:00
cpuidle powerpc/pseries/cpuidle: Fix preempt warning 2019-01-26 09:32:37 +01:00
crypto crypto: talitos - fix ablkcipher for CONFIG_VMAP_STACK 2019-01-22 21:40:32 +01:00
dax mm, devm_memremap_pages: fix shutdown handling 2019-01-13 09:51:04 +01:00
dca
devfreq Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
dio
dma dmaengine: cppi41: delete channel from pending list when stop channel 2018-12-13 09:16:20 +01:00
dma-buf
edac EDAC, skx_edac: Fix logical channel intermediate decoding 2018-11-13 11:08:44 -08:00
eisa
extcon
firewire firewire: use 64-bit time_t based interfaces 2018-08-17 16:20:27 -07:00
firmware efi/libstub: Disable some warnings for x86{,_64} 2019-01-26 09:32:36 +01:00
fmc
fpga fpga: altera-cvp: fix probing for multiple FPGAs on the bus 2019-01-26 09:32:36 +01:00
fsi fsi: master-ast-cf: select GENERIC_ALLOCATOR 2018-12-17 09:24:35 +01:00
gnss gnss: sirf: fix activation retry handling 2018-12-13 09:16:22 +01:00
gpio gpio: pl061: Move irq_chip definition inside struct pl061 2019-01-26 09:32:33 +01:00
gpu drm/amdgpu: Reorder uvd ring init before uvd resume 2019-01-26 09:32:36 +01:00
hid HID: ite: Add USB id match for another ITE based keyboard rfkill key quirk 2019-01-13 09:50:56 +01:00
hsi
hv x86, hyperv: remove PCI dependency 2019-01-13 09:51:00 +01:00
hwmon hwmon: (w83795) temp4_type has writable permission 2018-12-17 09:24:33 +01:00
hwspinlock hwspinlock: Fix incorrect return pointers 2018-07-30 20:54:51 -07:00
hwtracing intel_th: msu: Fix an off-by-one in attribute store 2019-01-13 09:51:10 +01:00
i2c i2c: dev: prevent adapter retries and timeout being set as minus value 2019-01-16 22:04:34 +01:00
ide ide: pmac: add of_node_put() 2018-12-21 14:15:18 +01:00
idle
iio iio: dac: ad5686: fix bit shift read register 2019-01-13 09:51:08 +01:00
infiniband IB/usnic: Fix potential deadlock 2019-01-26 09:32:42 +01:00
input Input: synaptics - enable SMBus for HP EliteBook 840 G4 2019-01-13 09:51:03 +01:00
iommu iommu/vt-d: Handle domain agaw being less than iommu agaw 2019-01-13 09:51:09 +01:00
ipack
irqchip irqchip/pdc: Setup all edge interrupts as rising edge at GIC 2018-11-13 11:08:34 -08:00
isdn isdn: fix kernel-infoleak in capi_unlocked_ioctl 2019-01-09 17:38:31 +01:00
leds leds: pwm: silently error out on EPROBE_DEFER 2019-01-13 09:51:08 +01:00
lightnvm lightnvm: pblk: fix race condition on metadata I/O 2018-11-13 11:08:21 -08:00
macintosh macintosh: therm_windtunnel: drop using attach_adapter 2018-08-24 14:42:42 +02:00
mailbox mailbox: PCC: handle parse error 2018-11-13 11:08:18 -08:00
mcb
md dm: Check for device sector overflow if CONFIG_LBDAF is not set 2019-01-26 09:32:42 +01:00
media media: venus: core: Set dma maximum segment size 2019-01-26 09:32:38 +01:00
memory memory: ti-aemif: fix a potential NULL-pointer dereference 2018-09-06 10:04:07 -07:00
memstick
message scsi: message: fusion: Replace GFP_ATOMIC with GFP_KERNEL 2018-07-30 23:17:53 -04:00
mfd mfd: tps6586x: Handle interrupts on suspend 2019-01-22 21:40:33 +01:00
misc misc: ibmvsm: Fix potential NULL pointer dereference 2019-01-31 08:14:35 +01:00
mmc mmc: atmel-mci: do not assume idle after atmci_request_end 2019-01-26 09:32:39 +01:00
mtd mtd: rawnand: qcom: fix memory corruption that causes panic 2019-01-16 22:04:34 +01:00
mux mux: adgs1408: use the correct MODULE_LICENSE 2018-10-12 17:36:39 +02:00
net net: phy: marvell: Fix deadlock from wrong locking 2019-01-31 08:14:33 +01:00
nfc NFC: nfcmrvl_uart: fix OF child-node lookup 2018-11-13 11:08:48 -08:00
ntb
nubus
nvdimm mm, devm_memremap_pages: fix shutdown handling 2019-01-13 09:51:04 +01:00
nvme nvmet-rdma: fix response use after free 2018-12-21 14:15:25 +01:00
nvmem nvmem: check the return value of nvmem_add_cells() 2018-11-13 11:08:35 -08:00
of of: overlay: add missing of_node_put() after add new node to changeset 2019-01-26 09:32:34 +01:00
opp opp: ti-opp-supply: Correct the supply in _get_optimal_vdd_voltage call 2018-12-01 09:37:27 +01:00
oprofile
parisc
parport Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
pci PCI: dwc: Move interrupt acking into the proper callback 2019-01-16 22:04:35 +01:00
pcmcia pcmcia: Implement CLKRUN protocol disabling for Ricoh bridges 2018-11-13 11:08:17 -08:00
perf drivers/perf: hisi: Fixup one DDRC PMU register offset 2019-01-13 09:51:10 +01:00
phy phy: qcom-qusb2: Fix HSTX_TRIM tuning with fused value for SDM845 2018-12-17 09:24:34 +01:00
pinctrl pinctrl: meson: fix pull enable register calculation 2019-01-13 09:50:54 +01:00
platform platform/x86: asus-wmi: Tell the EC the OS will handle the display off hotkey 2019-01-26 09:32:34 +01:00
pnp
power power: supply: olpc_battery: correct the temperature units 2019-01-13 09:51:10 +01:00
powercap
pps
ps3
ptp ptp: fix Spectre v1 vulnerability 2018-10-17 22:00:22 -07:00
pwm pwm: mediatek: Add MT7628 support 2018-08-20 11:36:07 +02:00
rapidio drivers/rapidio/devices/rio_mport_cdev.c: remove redundant pointer md 2018-08-22 10:52:51 -07:00
ras
regulator regulator: fix crash caused by null driver data 2018-09-20 09:04:51 -07:00
remoteproc remoteproc: qcom: q6v5: Propagate EPROBE_DEFER 2018-11-13 11:08:52 -08:00
reset ARM: SoC: late updates 2018-08-25 14:12:36 -07:00
rpmsg rpmsg: smd: fix memory leak on channel create 2018-11-13 11:08:55 -08:00
rtc rtc: m41t80: Correct alarm month range with RTC reads 2019-01-09 17:38:48 +01:00
s390 s390/smp: fix CPU hotplug deadlock with CPU rescan 2019-01-31 08:14:35 +01:00
sbus drivers/sbus/char: add of_node_put() 2018-12-21 14:15:17 +01:00
scsi scsi: megaraid: fix out-of-bound array accesses 2019-01-26 09:32:43 +01:00
sfi
sh sh: introduce a sh_cacheop_vaddr helper 2018-08-02 13:54:06 +02:00
siox
slimbus slimbus: ngd: mark PM functions as __maybe_unused 2018-12-19 19:19:49 +01:00
sn
soc soc: ti: QMSS: Fix usage of irq_set_affinity_hint 2018-11-21 09:19:18 +01:00
soundwire soundwire: Fix acquiring bus lock twice during master release 2018-08-27 09:49:48 +05:30
spi spi: bcm2835: Unbreak the build of esoteric configs 2019-01-09 17:38:49 +01:00
spmi
ssb ssb: Remove SSB_WARN_ON, SSB_BUG_ON and SSB_DEBUG 2018-08-09 18:47:47 +03:00
staging staging: erofs: fix use-after-free of on-stack `z_erofs_vle_unzip_io' 2019-01-26 09:32:38 +01:00
target scsi: target/core: Make sure that target_wait_for_sess_cmds() waits long enough 2019-01-26 09:32:38 +01:00
tc TC: Set DMA masks for devices 2018-11-13 11:08:51 -08:00
tee ARM: SoC driver updates 2018-08-23 13:52:46 -07:00
thermal thermal: armada: fix legacy validity test sense 2018-12-21 14:15:22 +01:00
thunderbolt thunderbolt: Prevent root port runtime suspend during NVM upgrade 2018-12-17 09:24:36 +01:00
tty tty/serial: do not free trasnmit buffer page under port lock 2019-01-26 09:32:40 +01:00
uio uio: Fix an Oops on load 2018-11-27 16:13:09 +01:00
usb USB: serial: pl2303: add new PID to support PL2303TB 2019-01-31 08:14:34 +01:00
uwb
vfio vfio/type1: Fix unmap overflow off-by-one 2019-01-16 22:04:34 +01:00
vhost vhost: log dirty page correctly 2019-01-31 08:14:32 +01:00
video omap2fb: Fix stack memory disclosure 2019-01-22 21:40:34 +01:00
virt
virtio virtio, vhost: fixes, tweaks 2018-08-24 08:45:19 -07:00
visorbus
vlynq
vme
w1 w1: omap-hdq: fix missing bus unregister at removal 2018-11-13 11:08:48 -08:00
watchdog include/linux/compiler*.h: make compiler-*.h mutually exclusive 2018-08-22 17:31:34 -07:00
xen xen: Fix x86 sched_clock() interface for xen 2019-01-22 21:40:32 +01:00
zorro
Kconfig
Makefile Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00