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| author | Zhang Shurong | 2023-07-10 13:32:13 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-09-23 11:11:06 +0200 |
| commit | dfcd3c010209927b9f45b860f046635dc32e32e1 (patch) | |
| tree | 9dada3055faf69d8c9b30e7943650783249dccd1 /kernel/user.c | |
| parent | 6ab7ea4e17d6a605d05308adf8f3408924770cba (diff) | |
media: dvb-usb-v2: gl861: Fix null-ptr-deref in gl861_i2c_master_xfer
[ Upstream commit b97719a66970601cd3151a3e2020f4454a1c4ff6 ]
In gl861_i2c_master_xfer, 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 gl861_i2c_master_xfer. 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 0ed554fd769a
("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")
Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/user.c')
0 files changed, 0 insertions, 0 deletions