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| /linux/drivers/media/usb/dvb-usb/ |
| H A D | dw2102.c | diff 5ae544d94abc8ff77b1b9bf8774def3fa5689b5b Sat Jul 08 12:22:52 CEST 2023 Zhang Shurong <zhang_shurong@foxmail.com> media: dw2102: Fix null-ptr-deref in dw2102_i2c_transfer()
In dw2102_i2c_transfer, msg is controlled by user. When msg[i].buf
is null and msg[i].len is zero, former checks on msg[i].buf would be
passed. Malicious data finally reach dw2102_i2c_transfer. If accessing
msg[i].buf[0] without sanity check, null ptr deref would happen.
We add check on msg[i].len to prevent crash.
Similar commit:
commit 950e252cb469
("[media] dw2102: limit messages to buffer size")
Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
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