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media: gspca/sq905.c: fix uninitialized variable

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[ Upstream commit eaaea4681984c79d2b2b160387b297477f0c1aab ]

act_len can be uninitialized if usb_bulk_msg() returns an error.
Set it to 0 to avoid a KMSAN error.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+a4e309017a5f3a24c7b3@syzkaller.appspotmail.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hans Verkuil 2021-03-11 15:46:40 +01:00 • committed by Greg Kroah-Hartman
commit bc73cb5299
1 changed files with 1 additions and 1 deletions
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2
drivers/media/usb/gspca/sq905.c
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@ -158,7 +158,7 @@ static int
sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock)
{
int ret;
int act_len;
int act_len = 0;
gspca_dev->usb_buf[0] = '\0';
if (need_lock)