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c1904127ce
linux/drivers/misc
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Oded Gabbay c1904127ce habanalabs: prevent race between fd close/open 
The driver allows only a single process to open a device's FD at any
single time. This is done by checking "hdev->compute_ctx" under mutex.

Therefore, to prevent a race between the moment a user closes it's FD
and when another user tries to open the device, we need to make sure
that clearing this variable is the very last thing that is done in the
code of the FD's release.

I'm moving the idle check before clearing this variable and the
"reset on device release". btw, if the reset happens it will prevent
any other user from opening the device until the reset is finished.

An important thing to note is that we need to remove the user process
that is closing the device from the process list BEFORE calling the
reset function. That is to prevent a case where the reset code will
try to kill that user process and it is unnecessary as the process
doesn't hold any device/driver resources anymore.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
2021-10-18 12:05:46 +03:00
..
altera-stapl altera-stapl: remove the unreached switch case 2020-12-09 19:53:03 +01:00
bcm-vk misc: bcm-vk: fix tty registration race 2021-09-21 16:17:15 +02:00
c2port misc: c2port: core: Make copying name from userspace more secure 2020-11-03 10:12:10 +01:00
cardreader misc: rtsx: Remove usage of the deprecated "pci-dma-compat.h" API 2021-09-14 10:57:31 +02:00
cb710 cb710: avoid NULL pointer subtraction 2021-10-05 15:50:05 +02:00
cxl cxl: Fix an error message 2021-05-14 13:43:26 +02:00
echo char: Replace HTTP links with HTTPS ones 2020-07-23 09:44:15 +02:00
eeprom eeprom: 93xx46: fix MODULE_DEVICE_TABLE 2021-10-15 10:54:02 +02:00
genwqe Merge 5.15-rc3 into char-misc next 2021-09-27 15:39:40 +02:00
habanalabs habanalabs: prevent race between fd close/open 2021-10-18 12:05:46 +03:00
ibmasm Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
lis3lv02d misc: lis3lv02d: Make lis3lv02d_remove_fs() return void 2021-10-13 14:35:20 +02:00
lkdtm lkdtm: Use init_uts_ns.name instead of macros 2021-09-10 17:09:40 +02:00
mei Merge 5.15-rc6 into char-misc-next 2021-10-18 09:29:27 +02:00
ocxl ocxl: use DEFINE_MUTEX() for mutex lock 2021-01-30 11:39:21 +11:00
pvpanic pvpanic: Indentation fixes here and there 2021-09-14 11:07:13 +02:00
sgi-gru misc: sgi-gru: Convert from atomic_t to refcount_t on gru_thread_state->ts_refcnt 2021-07-21 13:50:54 +02:00
sgi-xp sgi-xpc: Replace deprecated CPU-hotplug functions. 2021-08-03 16:30:36 +02:00
ti-st ti-st: use tty_write_room 2021-05-13 17:03:20 +02:00
uacce uacce: add print information if not enable sva 2021-06-09 18:53:29 +02:00
vmw_vmci VMCI: fix NULL pointer dereference when unmapping queue pair 2021-08-27 16:21:59 +02:00
ad525x_dpot-i2c.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot-spi.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot.h misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
apds990x.c
apds9802als.c
atmel-ssc.c
bh1770glc.c
cs5535-mfgpt.c
ds1682.c
dummy-irq.c
dw-xdata-pcie.c misc: Add Synopsys DesignWare xData IP driver 2021-04-05 13:15:52 +02:00
enclosure.c misc: enclosure: Update enclosure_remove_device() documentation to match reality 2020-07-01 15:05:37 +02:00
fastrpc.c Merge 5.15-rc6 into char-misc-next 2021-10-18 09:29:27 +02:00
gehc-achc.c misc: gehc: Add SPI ID table 2021-10-05 15:47:18 +02:00
hi6421v600-irq.c staging: hikey9xx: split hi6421v600 irq into a separate driver 2021-07-21 11:24:43 +02:00
hisi_hikey_usb.c misc: hisi_hikey_usb: change the DT schema 2021-09-14 10:57:31 +02:00
hmc6352.c
hpilo.c misc: hpilo: map iLO shared memory by PCI revision id 2021-06-04 15:28:23 +02:00
hpilo.h misc: hpilo: map iLO shared memory by PCI revision id 2021-06-04 15:28:23 +02:00
ibmvmc.c vio: make remove callback return void 2021-03-02 22:41:23 +11:00
ibmvmc.h
ics932s401.c ics932s401: fix broken handling of errors when word reading fails 2021-05-13 17:21:54 +02:00
isl29003.c misc: isl29003: Fix typo for get/set mode 2020-12-09 19:35:34 +01:00
isl29020.c
Kconfig misc: HI6421V600_IRQ should depend on HAS_IOMEM 2021-10-05 16:07:56 +02:00
kgdbts.c kgdb: fix gcc-11 warnings harder 2021-05-21 15:05:08 +02:00
lattice-ecp3-config.c firmware: replace HOTPLUG with UEVENT in FW_ACTION defines 2021-05-13 16:14:45 +02:00
Makefile IIO / Staging driver update for 5.15-rc1 2021-09-01 09:45:57 -07:00
pch_phub.c misc: pch_phub: Remove superfluous descriptions to non-existent args 'offset_address' 2020-07-01 15:05:37 +02:00
pci_endpoint_test.c pci-v5.15-changes 2021-09-07 19:13:42 -07:00
phantom.c
qcom-coincell.c
sram-exec.c char: Replace HTTP links with HTTPS ones 2020-07-23 09:44:15 +02:00
sram.c misc: sram: Only map reserved areas in Tegra SYSRAM 2021-08-05 14:27:46 +02:00
sram.h misc: sram: Only map reserved areas in Tegra SYSRAM 2021-08-05 14:27:46 +02:00
tifm_7xx1.c tifm: Remove usage of the deprecated "pci-dma-compat.h" API 2021-09-21 17:33:31 +02:00
tifm_core.c tifm: Remove usage of the deprecated "pci-dma-compat.h" API 2021-09-21 17:33:31 +02:00
tsl2550.c
vmw_balloon.c drivers: vmw_balloon: remove dentry pointer for debugfs 2021-03-10 09:21:02 +01:00
xilinx_sdfec.c misc: xilinx-sdfec: Drop unnecessary NULL check after container_of 2021-05-21 22:14:48 +02:00