media: em28xx: add missing em28xx_close_extension

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If em28xx dev has ->dev_next pointer, we need to delete ->dev_next list
node from em28xx_extension_devlist on disconnect to avoid UAF bugs and
corrupted list bugs, since driver frees this pointer on disconnect.

Reported-and-tested-by: syzbot+a6969ef522a36d3344c9@syzkaller.appspotmail.com

Fixes: 1a23f81b7d ("V4L/DVB (9979): em28xx: move usb probe code to a proper place")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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Pavel Skripkin 2021-07-29 22:23:33 +02:00 • committed by Mauro Carvalho Chehab

parent 9015fcc256

commit 2c98b8a345

1 changed files with 4 additions and 1 deletions

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drivers/media/usb/em28xx/em28xx-cards.c

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