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Harald Freudenberger b516daed99 s390/ap: Fix hanging ioctl caused by wrong msg counter 
commit e73a99f328 upstream.

When a AP queue is switched to soft offline, all pending
requests are purged out of the pending requests list and
'received' by the upper layer like zcrypt device drivers.
This is also done for requests which are already enqueued
into the firmware queue. A request in a firmware queue
may eventually produce an response message, but there is
no waiting process any more. However, the response was
counted with the queue_counter and as this counter was
reset to 0 with the offline switch, the pending response
caused the queue_counter to get negative. The next request
increased this counter to 0 (instead of 1) which caused
the ap code to assume there is nothing to receive and so
the response for this valid request was never tried to
fetch from the firmware queue.

This all caused a queue to not work properly after a
switch offline/online and in the end processes to hang
forever when trying to send a crypto request after an
queue offline/online switch cicle.

Fixed by a) making sure the counter does not drop below 0
and b) on a successful enqueue of a message has at least
a value of 1.

Additionally a warning is emitted, when a reply can't get
assigned to a waiting process. This may be normal operation
(process had timeout or has been killed) but may give a
hint that something unexpected happened (like this odd
behavior described above).

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-23 14:42:51 +02:00
..
accessibility
acpi Revert "ACPI: sleep: Put the FACS table after using it" 2021-06-16 12:01:39 +02:00
amba amba: Fix resource leak for drivers without .remove 2021-03-04 11:38:02 +01:00
android
ata ata: libahci_platform: fix IRQ check 2021-05-14 09:50:24 +02:00
atm atm: idt77252: fix null-ptr-dereference 2021-03-30 14:31:50 +02:00
auxdisplay auxdisplay: ht16k33: Fix refresh rate handling 2021-03-04 11:38:00 +01:00
base drivers: base: Fix device link removal 2021-06-03 09:00:34 +02:00
bcma
block nbd: Fix NULL pointer in flush_workqueue 2021-05-19 10:13:14 +02:00
bluetooth Bluetooth: Add a new USB ID for RTL8822CE 2021-06-18 10:00:05 +02:00
bus bus: ti-sysc: Fix flakey idling of uarts and stop using swsup_sidle_act 2021-06-10 13:39:22 +02:00
cdrom cdrom: gdrom: initialize global variable at init time 2021-05-26 12:06:55 +02:00
char char: hpet: add checks after calling ioremap 2021-06-03 09:00:41 +02:00
clk clk: exynos7: Mark aclk_fsys1_200 as critical 2021-05-19 10:13:19 +02:00
clocksource clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940 2021-05-19 10:13:18 +02:00
connector
counter counter: stm32-timer-cnt: fix ceiling miss-alignment with reload register 2021-03-25 09:04:16 +01:00
cpufreq cpufreq: intel_pstate: Use HWP if enabled by platform firmware 2021-05-19 10:12:51 +02:00
cpuidle cpuidle: Fix ARM_QCOM_SPM_CPUIDLE configuration 2021-05-14 09:50:16 +02:00
crypto Revert "crypto: cavium/nitrox - add an error message to explain the failure of pci_request_mem_regions" 2021-06-03 09:00:40 +02:00
dax device-dax: Fix default return code of range_parse() 2021-03-04 11:38:15 +01:00
dca
devfreq PM / devfreq: Use more accurate returned new_freq as resume_freq 2021-05-14 09:50:15 +02:00
dio
dma dmaengine: stedma40: add missing iounmap() on error in d40_probe() 2021-06-23 14:42:40 +02:00
dma-buf
edac EDAC/amd64: Do not load on family 0x15, model 0x13 2021-03-07 12:34:08 +01:00
eisa
extcon extcon: arizona: Fix various races on driver unbind 2021-05-11 14:47:24 +02:00
firewire firewire: nosy: Fix a use-after-free bug in nosy_ioctl() 2021-04-07 15:00:11 +02:00
firmware efi: cper: fix snprintf() use in cper_dimm_err_location() 2021-06-10 13:39:14 +02:00
fpga fpga: fpga-mgr: xilinx-spi: fix error messages on -EPROBE_DEFER 2021-05-14 09:50:06 +02:00
fsi
gnss
gpio gpio: wcd934x: Fix shift-out-of-bounds error 2021-06-16 12:01:45 +02:00
gpu radeon: use memcpy_to/fromio for UVD fw upload 2021-06-23 14:42:49 +02:00
greybus
hid HID: gt683r: add missing MODULE_DEVICE_TABLE 2021-06-18 10:00:04 +02:00
hsi HSI: core: fix resource leaks in hsi_add_client_from_dt() 2021-05-14 09:50:28 +02:00
hv Drivers: hv: vmbus: Increase wait time for VMbus unload 2021-05-14 09:50:21 +02:00
hwmon hwmon: (scpi-hwmon) shows the negative temperature properly 2021-06-23 14:42:49 +02:00
hwspinlock
hwtracing coresight: Do not scan for graph if none is present 2021-05-19 10:12:55 +02:00
i2c i2c: mpc: implement erratum A-004447 workaround 2021-06-16 12:01:38 +02:00
i3c Revert "i3c master: fix missing destroy_workqueue() on error in i3c_master_register" 2021-05-14 09:50:05 +02:00
ide ide/falconide: Fix module unload 2021-03-04 11:38:21 +01:00
idle
iio iio: adc: ad7192: handle regulator voltage error first 2021-06-03 09:00:33 +02:00
infiniband IB/mlx5: Fix initializing CQ fragments buffer 2021-06-16 12:01:46 +02:00
input Input: silead - add workaround for x86 BIOS-es which bring the chip up in a stuck state 2021-05-22 11:40:52 +02:00
interconnect interconnect: qcom: Add missing MODULE_DEVICE_TABLE 2021-06-03 09:00:46 +02:00
iommu iommu/vt-d: Use user privilege for RID2PASID translation 2021-06-03 09:00:49 +02:00
ipack
irqchip irqchip/gic-v3: Workaround inconsistent PMR setting on NMI entry 2021-06-23 14:42:49 +02:00
isdn isdn: mISDN: netjet: Fix crash in nj_probe: 2021-06-16 12:01:36 +02:00
leds leds: lp5523: check return value of lp5xx_read and jump to cleanup code 2021-05-26 12:06:56 +02:00
lightnvm
macintosh macintosh/adb-iop: Use big-endian autopoll mask 2021-03-04 11:37:42 +01:00
mailbox mailbox: sprd: Introduce refcnt when clients requests/free channels 2021-05-14 09:50:27 +02:00
mcb
md dm verity: fix require_signatures module_param permissions 2021-06-16 12:01:37 +02:00
media media: gspca: properly check for errors in po1030_probe() 2021-06-03 09:00:43 +02:00
memory memory: samsung: exynos5422-dmc: handle clk_set_parent() failure 2021-05-14 09:50:19 +02:00
memstick
message
mfd mfd: stm32-timers: Avoid clearing auto reload register 2021-05-14 09:50:27 +02:00
misc platform/x86: hp_accel: Avoid invoking _INI to speed up resume 2021-06-03 09:00:39 +02:00
mmc mmc: renesas_sdhi: Fix HS400 on R-Car M3-W+ 2021-06-16 12:01:41 +02:00
most
mtd mtd: rawnand: gpmi: Fix a double free in gpmi_nand_init 2021-05-14 09:50:15 +02:00
mux
net can: mcba_usb: fix memory leak in mcba_usb 2021-06-23 14:42:50 +02:00
nfc nfc: pn533: prevent potential memory corruption 2021-05-14 09:50:32 +02:00
ntb
nubus
nvdimm libnvdimm/region: Fix nvdimm_has_flush() to handle ND_REGION_ASYNC 2021-04-21 13:00:55 +02:00
nvme nvme-loop: do not warn for deleted controllers during reset 2021-06-18 10:00:05 +02:00
nvmem drivers: nvmem: Fix voltage settings for QTI qfprom-efuse 2021-05-14 09:50:14 +02:00
of of: overlay: fix for_each_child.cocci warnings 2021-05-14 09:50:24 +02:00
opp opp: Correct debug message in _opp_add_static_v2() 2021-03-04 11:37:27 +01:00
oprofile
parisc
parport
pci PCI: Work around Huawei Intelligent NIC VF FLR erratum 2021-06-23 14:42:51 +02:00
pcmcia
perf perf/arm_pmu_platform: Fix error handling 2021-05-11 14:47:19 +02:00
phy phy: phy-mtk-tphy: Fix some resource leaks in mtk_phy_init() 2021-06-23 14:42:48 +02:00
pinctrl pinctrl: samsung: use 'int' for register masks in Exynos 2021-05-19 10:12:55 +02:00
platform platform/x86: thinkpad_acpi: Add X1 Carbon Gen 9 second fan support 2021-06-23 14:42:47 +02:00
pnp
power power: supply: bq25980: Move props from battery node 2021-05-14 09:50:25 +02:00
powercap
pps
ps3
ptp ptp: improve max_adj check against unreasonable values 2021-06-23 14:42:45 +02:00
pwm pwm: atmel: Fix duty cycle calculation in .get_state() 2021-05-19 10:13:04 +02:00
rapidio rapidio: handle create_workqueue() failure 2021-05-26 12:06:52 +02:00
ras RAS/CEC: Correct ce_add_elem()'s returned values 2021-04-14 08:42:12 +02:00
regulator regulator: rt4801: Fix NULL pointer dereference if priv->enable_gpios is NULL 2021-06-23 14:42:48 +02:00
remoteproc remoteproc: qcom_q6v5_mss: Validate p_filesz in ELF loader 2021-05-19 10:13:01 +02:00
reset
rpmsg rpmsg: qcom_glink_native: fix error return code of qcom_glink_rx_data() 2021-05-19 10:13:02 +02:00
rtc rtc: pcf85063: fallback to parent of_node 2021-05-26 12:06:57 +02:00
s390 s390/ap: Fix hanging ioctl caused by wrong msg counter 2021-06-23 14:42:51 +02:00
sbus
scsi scsi: scsi_devinfo: Add blacklist entry for HPE OPEN-V 2021-06-18 10:00:05 +02:00
sfi
sh
siox
slimbus
soc soc: aspeed: fix a ternary sign expansion bug 2021-05-14 09:50:21 +02:00
soundwire soundwire: stream: fix memory leak in stream config error path 2021-05-14 09:50:14 +02:00
spi spi: stm32-qspi: Always wait BUSY bit to be cleared in stm32_qspi_wait_cmd() 2021-06-23 14:42:48 +02:00
spmi spmi: spmi-pmic-arb: Fix hw_irq overflow 2021-03-04 11:38:40 +01:00
ssb
staging pinctrl: ralink: rt2880: avoid to error in calls is pin is already enabled 2021-06-23 14:42:49 +02:00
target scsi: target: core: Fix warning on realtime kernels 2021-06-18 10:00:04 +02:00
tc
tee optee: use export_uuid() to copy client UUID 2021-06-10 13:39:21 +02:00
thermal thermal/drivers/intel: Initialize RW trip to THERMAL_TEMP_INVALID 2021-06-03 09:00:35 +02:00
thunderbolt thunderbolt: dma_port: Fix NVM read buffer bounds and offset issue 2021-06-03 09:00:32 +02:00
tty serial: stm32: fix threaded interrupt handling 2021-06-10 13:39:22 +02:00
uio uio_hv_generic: Fix a memory leak in error handling paths 2021-05-26 12:06:52 +02:00
usb usb: chipidea: imx: Fix Battery Charger 1.2 CDP detection 2021-06-23 14:42:50 +02:00
vdpa {net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table 2021-06-03 09:00:36 +02:00
vfio vfio/platform: fix module_put call in error flow 2021-06-10 13:39:15 +02:00
vhost vhost-vdpa: fix vm_flags for virtqueue doorbell mapping 2021-05-11 14:47:12 +02:00
video video: hgafb: correctly handle card detect failure during probe 2021-05-26 12:06:57 +02:00
virt nitro_enclaves: Fix stale file descriptors on failed usercopy 2021-05-11 14:47:11 +02:00
virtio
visorbus
vlynq
vme
w1 w1: w1_therm: Fix conversion result for negative temperatures 2021-03-04 11:37:18 +01:00
watchdog watchdog: mei_wdt: request stop on unregister 2021-03-04 11:38:36 +01:00
xen xen-pciback: reconfigure also from backend watch handler 2021-05-26 12:06:54 +02:00
zorro
Kconfig
Makefile