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linux-stable/drivers/media/usb
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Baisong Zhong 6b60cf73a9 media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer() 
[ Upstream commit 0ed554fd76 ]

Wei Chen reports a kernel bug as blew:

general protection fault, probably for non-canonical address
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
...
Call Trace:
<TASK>
__i2c_transfer+0x77e/0x1930 drivers/i2c/i2c-core-base.c:2109
i2c_transfer+0x1d5/0x3d0 drivers/i2c/i2c-core-base.c:2170
i2cdev_ioctl_rdwr+0x393/0x660 drivers/i2c/i2c-dev.c:297
i2cdev_ioctl+0x75d/0x9f0 drivers/i2c/i2c-dev.c:458
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd834a8bded

In az6027_i2c_xfer(), if msg[i].addr is 0x99,
a null-ptr-deref will caused when accessing msg[i].buf.
For msg[i].len is 0 and msg[i].buf is null.

Fix this by checking msg[i].len in az6027_i2c_xfer().

Link: https://lore.kernel.org/lkml/CAO4mrfcPHB5aQJO=mpqV+p8mPLNg-Fok0gw8gZ=zemAfMGTzMg@mail.gmail.com/

Link: https://lore.kernel.org/linux-media/20221120065918.2160782-1-zhongbaisong@huawei.com
Fixes: 76f9a820c8 ("V4L/DVB: AZ6027: Initial import of the driver")
Reported-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Baisong Zhong <zhongbaisong@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-31 13:32:16 +01:00
..
airspy media: airspy: fix memory leak in airspy probe 2022-08-30 07:31:42 +02:00
as102 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
au0828 media: mc: convert pipeline funcs to take media_pad 2022-09-24 09:22:30 +02:00
b2c2 media: flexcop-usb: use usb_endpoint_maxp() 2022-09-26 10:59:25 +02:00
cx231xx media: avoid use of 'videobuf' 2022-08-29 16:27:18 +02:00
dvb-usb media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer() 2022-12-31 13:32:16 +01:00
dvb-usb-v2 media: usb/dvb-usb-v2: fix repeated words in comments 2022-09-24 08:47:01 +02:00
em28xx media: avoid use of 'videobuf' 2022-08-29 16:27:18 +02:00
go7007 i2c: Make remove callback return void 2022-08-16 12:46:26 +02:00
gspca media: gspca: Fix typo 'the the' in comment 2022-08-29 15:32:14 +02:00
hackrf media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
hdpvr media: hdpvr: fix error value returns in hdpvr_read 2022-06-27 09:02:50 +01:00
msi2500 media: usb/msi2500: fix repeated words in comments 2022-09-24 08:46:38 +02:00
pvrusb2 media: avoid use of 'videobuf' 2022-08-29 16:27:18 +02:00
pwc media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
s2255 media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
siano media: siano: remove duplicate USB device IDs 2021-12-07 11:29:58 +01:00
stk1160 media: stk1160: use dma_alloc_noncontiguous API 2022-03-07 11:01:22 +01:00
ttusb-budget media: dvb-ttusb-budget: cleanup printk logic 2020-09-03 11:15:47 +02:00
ttusb-dec media: ttusb-dec: avoid release of non-acquired mutex 2021-09-30 10:07:40 +02:00
usbtv media: usbtv: Add PAL-Nc standard 2022-06-20 10:30:30 +01:00
uvc USB/Thunderbolt changes for 6.1-rc1 2022-10-07 16:48:26 -07:00
Kconfig media: tm6000: deprecate this driver 2022-08-29 16:43:00 +02:00
Makefile media: tm6000: deprecate this driver 2022-08-29 16:43:00 +02:00