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43eaf1b178
linux/drivers
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Vincent Mailhol 43eaf1b178 can: gs_usb: change active_channels's type from atomic_t to u8 
commit 035b0fcf02 upstream.

The driver uses an atomic_t variable: gs_usb:active_channels to keep
track of the number of opened channels in order to only allocate
memory for the URBs when this count changes from zero to one.

However, the driver does not decrement the counter when an error
occurs in gs_can_open(). This issue is fixed by changing the type from
atomic_t to u8 and by simplifying the logic accordingly.

It is safe to use an u8 here because the network stack big kernel lock
(a.k.a. rtnl_mutex) is being hold. For details, please refer to [1].

[1] https://lore.kernel.org/linux-can/CAMZ6Rq+sHpiw34ijPsmp7vbUpDtJwvVtdV7CvRZJsLixjAFfrg@mail.gmail.com/T/#t

Fixes: d08e973a77 ("can: gs_usb: Added support for the GS_USB CAN devices")
Link: https://lore.kernel.org/all/20220214234814.1321599-1-mailhol.vincent@wanadoo.fr
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-03-08 19:09:35 +01:00
..
accessibility speakup-dectlk: Restore pitch setting 2022-02-16 12:54:30 +01:00
acpi ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE 2022-02-16 12:54:24 +01:00
amba ARM: 9120/1: Revert "amba: make use of -1 IRQs warn" 2021-11-06 14:10:09 +01:00
android binder: fix handling of error during copy 2022-01-27 10:54:06 +01:00
ata ata: pata_hpt37x: fix PCI clock detection 2022-03-08 19:09:31 +01:00
atm
auxdisplay auxdisplay: ht16k33: Fix frame buffer device blanking 2021-11-18 14:04:24 +01:00
base driver core: Free DMA range map when device is released 2022-03-02 11:42:56 +01:00
bcma bcma: Fix memory leak for internally-handled cores 2021-09-15 09:50:45 +02:00
block floppy: Add max size check for user space request 2022-01-27 10:54:14 +01:00
bluetooth Bluetooth: vhci: Set HCI_QUIRK_VALID_LE_STATES 2022-01-27 10:54:18 +01:00
bus Revert "drivers: bus: simple-pm-bus: Add support for probing simple bus only devices" 2022-02-05 12:37:55 +01:00
cdrom
char random: wake up /dev/random writers after zap 2022-02-23 12:01:00 +01:00
clk clk: jz4725b: fix mmc0 clock gating 2022-03-02 11:42:46 +01:00
clocksource ARM: dts: Fix timer regression for beagleboard revision c 2022-02-16 12:54:22 +01:00
connector
counter counter: stm32-lptimer-cnt: remove iio counter abi 2022-01-27 10:54:08 +01:00
cpufreq cpufreq: Fix initialization of min and max frequency QoS requests 2022-01-27 10:54:17 +01:00
cpuidle cpuidle: Fix kobject memory leaks in error paths 2021-11-18 14:04:05 +01:00
crypto crypto: caam - replace this_cpu_ptr with raw_cpu_ptr 2022-01-27 10:54:24 +01:00
dax
dca
devfreq
dio
dma dmaengine: shdma: Fix runtime PM imbalance on error 2022-03-08 19:09:30 +01:00
dma-buf dma-buf: heaps: Fix potential spectre v1 gadget 2022-02-08 18:30:36 +01:00
edac EDAC: Fix calculation of returned address and next offset in edac_align_ptr() 2022-02-23 12:01:07 +01:00
eisa
extcon
firewire
firmware firmware: arm_scmi: Remove space in MODULE_ALIAS name 2022-03-08 19:09:35 +01:00
fpga fpga: machxo2-spi: Fix missing error code in machxo2_write_complete() 2021-09-30 10:11:04 +02:00
fsi
gnss
gpio gpio: tegra186: Fix chip_data type confusion 2022-03-02 11:42:57 +01:00
gpu drm/i915: s/JSP2/ICP2/ PCH 2022-03-08 19:09:31 +01:00
greybus
hid HID:Add support for UGTABLET WP5540 2022-02-23 12:00:57 +01:00
hsi HSI: core: Fix return freed object in hsi_new_client 2022-01-27 10:54:12 +01:00
hv Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj 2022-02-23 12:01:04 +01:00
hwmon hwmon: Handle failure to register sensor with thermal zone correctly 2022-03-02 11:42:48 +01:00
hwspinlock
hwtracing coresight: cti: Correct the parameter for pm_runtime_put 2021-11-18 14:03:51 +01:00
i2c i2c: qup: allow COMPILE_TEST 2022-03-08 19:09:30 +01:00
i3c
ide
idle
iio iio: Fix error handling for PM 2022-03-02 11:42:53 +01:00
infiniband RDMA/cma: Do not change route.addr.src_addr outside state checks 2022-03-02 11:42:56 +01:00
input Input: clear BTN_RIGHT/MIDDLE on buttonpads 2022-03-08 19:09:29 +01:00
interconnect treewide: Change list_sort to use const pointers 2021-09-30 10:11:04 +02:00
iommu iommu/amd: Recover from event log overflow 2022-03-08 19:09:31 +01:00
ipack ipack: ipoctal: fix module reference leak 2021-10-06 15:56:01 +02:00
irqchip irqchip/sifive-plic: Add missing thead,c900-plic match string 2022-02-23 12:01:05 +01:00
isdn mISDN: change function names to avoid conflicts 2022-01-11 15:25:02 +01:00
leds leds: trigger: audio: Add an activate callback to ensure the initial brightness is set 2021-09-15 09:50:36 +02:00
lightnvm
macintosh
mailbox soc: mediatek: cmdq: add address shift in jump 2021-09-18 13:40:16 +02:00
mcb mcb: fix error handling in mcb_alloc_bus() 2021-09-30 10:11:00 +02:00
md dm: fix alloc_dax error handling in alloc_dev 2022-01-27 10:54:22 +01:00
media media: venus: core: Drop second v4l2 device unregister 2022-02-01 17:25:38 +01:00
memory memory: renesas-rpc-if: Return error in case devm_ioremap_resource() fails 2022-01-27 10:53:48 +01:00
memstick memstick: jmb38x_ms: use appropriate free function in jmb38x_ms_alloc_host() 2021-11-18 14:04:07 +01:00
message
mfd mfd: atmel-flexcom: Use .resume_noirq 2022-01-27 10:53:51 +01:00
misc eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX 2022-02-16 12:54:27 +01:00
mmc mmc: block: fix read single on recovery logic 2022-02-23 12:00:57 +01:00
most most: fix control-message timeouts 2021-11-18 14:03:51 +01:00
mtd mtd: rawnand: brcmnand: Fixed incorrect sub-page ECC status 2022-02-23 12:01:04 +01:00
mux
net can: gs_usb: change active_channels's type from atomic_t to u8 2022-03-08 19:09:35 +01:00
nfc NFC: st21nfca: Fix memory leak in device probe and remove 2022-01-05 12:40:31 +01:00
ntb ntb: intel: fix port config status offset for SPR 2022-03-08 19:09:32 +01:00
nubus
nvdimm libnvdimm/pmem: Fix crash triggered when I/O in-flight during unbind 2021-09-18 13:40:36 +02:00
nvme nvme-rdma: fix possible use-after-free in transport error_recovery work 2022-02-23 12:01:00 +01:00
nvmem nvmem: core: set size for sysfs bin file 2022-01-27 10:54:22 +01:00
of of: base: Improve argument length mismatch error 2022-01-27 10:54:28 +01:00
opp opp: Fix return in _opp_add_static_v2() 2021-11-18 14:04:22 +01:00
oprofile
parisc parisc: Fix sglist access in ccio-dma.c 2022-02-23 12:00:57 +01:00
parport parport: remove non-zero check on count 2021-09-18 13:40:34 +02:00
pci PCI: hv: Fix NUMA node assignment when kernel boots with custom NUMA topology 2022-02-23 12:00:57 +01:00
pcmcia pcmcia: fix setting of kthread task states 2022-01-27 10:54:03 +01:00
perf
phy phy: usb: Leave some clocks running during suspend 2022-02-23 12:01:05 +01:00
pinctrl pinctrl: bcm2835: Fix a few error paths 2022-02-08 18:30:39 +01:00
platform surface: surface3_power: Fix battery readings on batteries without a serial number 2022-03-02 11:42:51 +01:00
pnp
power power: reset: mt6397: Check for null res pointer 2022-01-27 10:54:00 +01:00
powercap
pps
ps3
ptp ptp_pch: Load module automatically if ID matches 2021-10-13 10:04:27 +02:00
pwm pwm: stm32-lp: Don't modify HW state in .remove() callback 2021-09-26 14:09:01 +02:00
rapidio
ras
regulator regulator: core: fix false positive in regulator_late_cleanup() 2022-03-08 19:09:29 +01:00
remoteproc remoteproc: qcom: pil_info: Don't memcpy_toio more than is provided 2022-01-20 09:17:50 +01:00
reset reset: socfpga: add empty driver allowing consumers to probe 2021-11-18 14:03:42 +01:00
rpmsg rpmsg: char: Fix race between the release of rpmsg_eptdev and cdev 2022-02-01 17:25:43 +01:00
rtc rtc: cmos: Evaluate century appropriate 2022-02-08 18:30:39 +01:00
s390 scsi: zfcp: Fix failed recovery on gone remote port with non-NPIV FCP devices 2022-02-01 17:25:39 +01:00
sbus
scsi scsi: lpfc: Fix pt2pt NVMe PRLI reject LOGO loop 2022-02-23 12:01:07 +01:00
sfi
sh maple: fix wrong return value of maple_bus_init(). 2021-11-26 10:39:12 +01:00
siox
slimbus slimbus: ngd: reset dma setup during runtime pm 2021-08-26 08:35:55 -04:00
soc soc: aspeed: lpc-ctrl: Block error printing on probe defer cases 2022-02-23 12:01:06 +01:00
soundwire soundwire: debugfs: use controller id and link_id for debugfs 2021-11-18 14:04:16 +01:00
spi spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op() 2022-03-02 11:42:52 +01:00
spmi
ssb
staging staging: fbtft: Fix error path in fbtft_driver_module_init() 2022-02-16 12:54:23 +01:00
target scsi: target: iscsi: Make sure the np under each tpg is unique 2022-02-16 12:54:19 +01:00
tc
tee optee: use driver internal tee_context for some rpc 2022-03-02 11:42:47 +01:00
thermal thermal: core: Fix TZ_GET_TRIP NULL pointer dereference 2022-03-08 19:09:32 +01:00
thunderbolt thunderbolt: Runtime PM activate both ends of the device link 2022-01-27 10:54:14 +01:00
tty serial: stm32: prevent TDR register overwrite when sending x_char 2022-03-08 19:09:30 +01:00
uio
usb usb: gadget: clear related members when goto fail 2022-03-08 19:09:30 +01:00
vdpa vdpa/mlx5: Fix wrong configuration of virtio_version_1_0 2022-01-27 10:54:33 +01:00
vfio vfio: Use config not menuconfig for VFIO_NOIOMMU 2021-09-18 13:40:12 +02:00
vhost vhost/vsock: don't check owner in vhost_vsock_stop() while releasing 2022-03-02 11:42:46 +01:00
video fbcon: Add option to enable legacy hardware acceleration 2022-02-08 18:30:40 +01:00
virt
virtio virtio_ring: mark ring unused on error 2022-01-27 10:54:33 +01:00
visorbus
vlynq
vme
w1 w1: Misuse of get_user()/put_user() reported by sparse 2022-01-27 10:54:22 +01:00
watchdog ar7: fix kernel builds for compiler test 2021-11-18 14:04:24 +01:00
xen xen/gntdev: fix unmap notification order 2022-01-27 10:54:24 +01:00
zorro
Kconfig
Makefile