From: Daniil Dulov d.dulov@aladdin.ru
[ Upstream commit 0b70530ee740861f4776ff724fcc25023df1799a ]
If go7007_read_addr() returns error channel is not assigned a value. In this case go to allocfail.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 866b8695d67e ("Staging: add the go7007 video driver") Signed-off-by: Daniil Dulov d.dulov@aladdin.ru Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/usb/go7007/go7007-usb.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/go7007/go7007-usb.c b/drivers/media/usb/go7007/go7007-usb.c index f889c9d740cd1..1cfe8371511d0 100644 --- a/drivers/media/usb/go7007/go7007-usb.c +++ b/drivers/media/usb/go7007/go7007-usb.c @@ -1198,7 +1198,9 @@ static int go7007_usb_probe(struct usb_interface *intf, u16 channel;
/* read channel number from GPIO[1:0] */ - go7007_read_addr(go, 0x3c81, &channel); + if (go7007_read_addr(go, 0x3c81, &channel)) + goto allocfail; + channel &= 0x3; go->board_id = GO7007_BOARDID_ADLINK_MPG24; usb->board = board = &board_adlink_mpg24;