media: hdpvr: Add device num check and handling

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Add hdpvr device num check and error handling

We need to increment the device count atomically before we checkout a
device to make sure that we do not reach the max count, otherwise we get
out-of-bounds errors as reported by syzbot.

Reported-and-tested-by: syzbot+aac8d0d7205f112045d2@syzkaller.appspotmail.com

Signed-off-by: Luke Nowakowski-Krijger <lnowakow@eng.ucsd.edu>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

...

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Luke Nowakowski-Krijger 2019-07-17 10:19:46 -04:00 • committed by Mauro Carvalho Chehab

parent 9e037bdf74

commit d4a6a9537b

1 changed files with 11 additions and 1 deletions

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drivers/media/usb/hdpvr/hdpvr-core.c

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