linux/drivers/misc
Tomer Tayar 41021f728a habanalabs: fix race between hl_get_compute_ctx() and hl_ctx_put()
hl_get_compute_ctx() is used to get the pointer to the compute context
from the hpriv object.
The function is called in code paths that are not necessarily initiated
by user, so it is possible that a context release process will happen in
parallel.
This can lead to a race condition in which hl_get_compute_ctx()
retrieves the context pointer, and just before it increments the context
refcount, the context object is released and a freed memory is accessed.

To avoid this race, add a mutex to protect the context pointer in hpriv.
With this lock, hl_get_compute_ctx() will be able to detect if the
context has been released or is about to be released.

struct hl_ctx_mgr has a mutex for contexts IDR with a similar "ctx_lock"
name, so rename it to just "lock" to avoid a confusion with the new
lock.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
2022-07-12 09:09:22 +03:00
..
altera-stapl altera-stapl: Use swap() instead of open coding it 2022-05-09 15:39:45 +02:00
bcm-vk misc: bcm-vk: replace usage of found with dedicated list iterator variable 2022-04-24 17:30:27 +02:00
c2port
cardreader Merge 5.19-rc6 into char-misc-next 2022-07-11 08:32:58 +02:00
cb710 cb710: avoid NULL pointer subtraction 2021-10-05 15:50:05 +02:00
cxl cxl: drop unexpected word "the" in the comments 2022-06-27 16:15:38 +02:00
echo
eeprom Merge 5.19-rc6 into char-misc-next 2022-07-11 08:32:58 +02:00
genwqe Merge 5.15-rc3 into char-misc next 2021-09-27 15:39:40 +02:00
habanalabs habanalabs: fix race between hl_get_compute_ctx() and hl_ctx_put() 2022-07-12 09:09:22 +03:00
ibmasm
lis3lv02d spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
lkdtm lkdtm: cfi: use NULL for a null pointer rather than zero 2022-06-27 16:16:07 +02:00
mei mei: me: add raptor lake point S DID 2022-06-10 15:39:24 +02:00
ocxl cxl/ocxl: Prepare cleanup of powerpc's asm/prom.h 2022-05-11 23:06:39 +10:00
pvpanic misc/pvpanic: Convert regular spinlock into trylock on panic path 2022-04-29 16:54:59 +02:00
sgi-gru misc: sgi-gru: grukservices: drop unexpected word "the" in the comments 2022-06-27 16:15:17 +02:00
sgi-xp sgi-xp: Use the bitmap API to allocate bitmaps 2022-07-08 15:41:39 +02:00
ti-st
uacce uacce: Handle parent device removal or parent driver module rmmod 2022-07-01 10:35:08 +02:00
vmw_vmci VMCI: Add support for ARM64 2022-04-24 17:32:14 +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 spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
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 misc: atmel-ssc: Fix IRQ check in ssc_probe 2022-06-10 15:29:56 +02:00
bh1770glc.c
cs5535-mfgpt.c
ds1682.c
dummy-irq.c
dw-xdata-pcie.c
enclosure.c misc: enclosure: replace snprintf in show functions with sysfs_emit 2021-10-22 11:25:39 +02:00
fastrpc.c misc: fastrpc: fix list iterator in fastrpc_req_mem_unmap_impl 2022-05-19 18:57:20 +02:00
gehc-achc.c misc: gehc: Add SPI ID table 2021-10-05 15:47:18 +02:00
hi6421v600-irq.c misc: hi6421-spmi-pmic: Use generic_handle_irq_safe(). 2022-03-02 22:28:50 +01:00
hisi_hikey_usb.c misc: hisi_hikey_usb: change the DT schema 2021-09-14 10:57:31 +02:00
hmc6352.c
hpilo.c
hpilo.h
ibmvmc.c
ibmvmc.h
ics932s401.c
isl29003.c
isl29020.c
Kconfig misc: fastrpc: Add support to secure memory map 2022-03-18 14:11:00 +01:00
kgdbts.c kgdbts: fix return value of __setup handler 2022-03-18 14:17:56 +01:00
lattice-ecp3-config.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
Makefile misc: open-dice: Add driver to expose DICE data to userspace 2022-02-04 16:45:39 +01:00
open-dice.c misc: open-dice: Add driver to expose DICE data to userspace 2022-02-04 16:45:39 +01:00
pch_phub.c
pci_endpoint_test.c misc: pci_endpoint_test: Terminate statement with semicolon 2022-01-11 10:19:59 -06:00
phantom.c
qcom-coincell.c
sram-exec.c
sram.c misc: sram: Add compatible string for Tegra234 SYSRAM 2021-12-08 15:16:05 +01:00
sram.h
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 vmw_balloon: Print errors on reset only once 2022-04-24 17:24:06 +02:00
xilinx_sdfec.c