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linux/drivers/misc
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Ling Xu 802359a526 misc: fastrpc: Skip reference for DMA handles 
commit 10df039834 upstream.

If multiple dma handles are passed with same fd over a remote call
the kernel driver takes a reference and expects that put for the
map will be called as many times to free the map. But DSP only
updates the fd one time in the fd list when the DSP refcount
goes to zero and hence kernel make put call only once for the
fd. This can cause SMMU fault issue as the same fd can be used
in future for some other call.

Fixes: 35a82b8713 ("misc: fastrpc: Add dma handle implementation")
Cc: stable@kernel.org
Co-developed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Ling Xu <quic_lxu5@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://lore.kernel.org/r/20250912131236.303102-5-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-10-15 12:00:23 +02:00
..
altera-stapl move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
bcm-vk move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
c2port c2port: replace deprecated strncpy with strscpy 2023-10-05 13:34:05 +02:00
cardreader misc: rtsx: usb: Ensure mmc child device is active when card is present 2025-08-20 18:30:52 +02:00
cb710 cb710: avoid NULL pointer subtraction 2021-10-05 15:50:05 +02:00
cxl cxl: Constify struct kobj_type 2024-09-11 16:02:50 +02:00
echo char: Replace HTTP links with HTTPS ones 2020-07-23 09:44:15 +02:00
eeprom eeprom: ee1004: Check chip before probing 2025-05-29 11:02:43 +02:00
genwqe misc: genwqe: Fix incorrect cmd field being reported in error 2025-10-15 12:00:09 +02:00
ibmasm ibmasm: convert to new timestamp accessors 2023-10-18 13:26:16 +02:00
keba misc: keba: Fix sysfs group creation 2024-09-03 12:37:29 +02:00
lis3lv02d [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
lkdtm objtool, lkdtm: Obfuscate the do_nothing() pointer 2025-05-02 07:59:20 +02:00
mchp_pci1xxxx misc: microchip: pci1xxxx: Fix incorrect IRQ status handling during ack 2025-05-02 07:59:10 +02:00
mei mei: bus: Check for still connected devices in mei_cl_bus_dev_release() 2025-08-20 18:30:25 +02:00
ocxl ocxl: Remove the unused declarations in headr file 2024-09-11 16:03:20 +02:00
pvpanic Linux 6.9-rc7 2024-05-08 19:21:51 +01:00
sgi-gru misc: sgi-gru: Don't disable preemption in GRU driver 2024-10-09 12:47:01 -07:00
sgi-xp sysctl-6.7-rc1 2023-11-01 20:51:41 -10:00
ti-st misc: ti-st: st_kim: use 'time_left' variable with wait_for_completion_interruptible_timeout() 2024-07-03 16:40:18 +02:00
uacce uacce: make uacce_class constant 2023-10-27 08:51:00 +02:00
vmw_vmci Revert "vmci: Prevent the dispatching of uninitialized payloads" 2025-08-15 12:13:36 +02:00
ad525x_dpot-i2c.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
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 misc: apds990x: Fix missing pm_runtime_disable() 2024-12-05 14:02:36 +01:00
apds9802als.c misc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-07-03 16:41:00 +02:00
atmel-ssc.c misc: atmel-ssc: Convert to platform remove callback returning void 2024-03-05 14:28:51 +00:00
bh1770glc.c misc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-07-03 16:41:00 +02:00
cs5535-mfgpt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
ds1682.c misc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-07-03 16:41:00 +02:00
dummy-irq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
dw-xdata-pcie.c dw-xdata: Remove usage of the deprecated ida_simple_*() API 2023-12-31 11:09:26 +00:00
enclosure.c drivers: remove struct module * setting from struct class 2023-03-17 15:16:27 +01:00
fastrpc.c misc: fastrpc: Skip reference for DMA handles 2025-10-15 12:00:23 +02:00
gehc-achc.c misc: gehc-achc: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:43 +00:00
hi6421v600-irq.c misc: hi6421-spmi-pmic: Remove unused of_gpio.h 2024-03-05 14:28:41 +00:00
hisi_hikey_usb.c misc: hisi_hikey_usb: Convert to platform remove callback returning void 2024-03-05 14:28:52 +00:00
hmc6352.c misc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-07-03 16:41:00 +02:00
hpilo.c misc: hpilo: rename device creation loop variable 2024-01-30 16:19:43 -08:00
hpilo.h misc: hpilo: map iLO shared memory by PCI revision id 2021-06-04 15:28:23 +02:00
ibmvmc.c Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
ibmvmc.h misc: Use the correct style for SPDX License Identifier 2019-10-10 15:34:40 +02:00
ics932s401.c misc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-07-03 16:41:00 +02:00
isl29003.c misc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-07-03 16:41:00 +02:00
isl29020.c misc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-07-03 16:41:00 +02:00
Kconfig rpmb: add Replay Protected Memory Block (RPMB) subsystem 2024-08-26 13:16:20 +02:00
kgdbts.c kgdbts: fix hw_access_break_test 2024-08-13 11:27:38 +02:00
lattice-ecp3-config.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
Makefile rpmb: add Replay Protected Memory Block (RPMB) subsystem 2024-08-26 13:16:20 +02:00
mrvl_cn10k_dpi.c misc: mrvl-cn10k-dpi: add Octeon CN10K DPI administrative driver 2024-07-10 14:58:29 +02:00
nsm.c misc: nsm: drop owner assignment 2024-05-22 08:31:17 -04:00
ntsync.c [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
open-dice.c misc: open-dice: add missing MODULE_DESCRIPTION() macro 2024-06-04 17:40:20 +02:00
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 misc: pci_endpoint_test: Give disabled BARs a distinct error code 2025-05-29 11:02:25 +02:00
phantom.c [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
qcom-coincell.c misc: Explicitly include correct DT includes 2023-08-04 15:39:04 +02:00
rpmb-core.c rpmb: fix error path in rpmb_dev_register() 2024-09-04 15:04:57 +02:00
smpro-errmon.c misc: smpro-errmon: Remove the unneeded include <linux/i2c.h> 2023-05-31 19:00:10 +01:00
smpro-misc.c misc: smpro-misc: Add Ampere's Altra SMpro misc driver 2022-11-10 19:03:03 +01:00
sram-exec.c mm: Introduce set_memory_rox() 2022-12-15 10:37:26 -08:00
sram.c misc: sram: Convert to platform remove callback returning void 2024-03-05 14:28:52 +00:00
sram.h misc: sram: Improve and simplify clk handling 2023-03-09 17:31:53 +01:00
tifm_7xx1.c misc: tifm: use 'time_left' variable with wait_for_completion_timeout() 2024-07-03 16:40:18 +02:00
tifm_core.c driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
tps6594-esm.c Merge 6.5-rc6 into char-misc-next 2023-08-13 22:14:51 +02:00
tps6594-pfsm.c misc: tps6594-pfsm: Add NULL pointer check in tps6594_pfsm_probe() 2025-07-06 11:01:35 +02:00
tsl2550.c misc: tsl2550: replace simple_strtoul to kstrtoul 2024-09-03 12:34:31 +02:00
vcpu_stall_detector.c misc: Register a PPI for the vcpu stall detection virtual device 2024-07-04 12:31:22 +02:00
vmw_balloon.c vmw_balloon: dynamically allocate the vmw-balloon shrinker 2023-10-04 10:32:25 -07:00
xilinx_sdfec.c misc: xilinx_sdfec: Convert to platform remove callback returning void 2024-03-05 14:28:52 +00:00
xilinx_tmr_inject.c fault-inject: improve build for CONFIG_FAULT_INJECTION=n 2024-09-01 20:43:33 -07:00
xilinx_tmr_manager.c misc: Explicitly include correct DT includes 2023-08-04 15:39:04 +02:00