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media: go7007: add check of return value of go7007_read_addr()

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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: 866b8695d6 ("Staging: add the go7007 video driver")
Signed-off-by: Daniil Dulov <d.dulov@aladdin.ru>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Daniil Dulov 2024-02-11 07:07:05 -08:00 • committed by Hans Verkuil
parent 044c566d05
commit 0b70530ee7
1 changed files with 3 additions and 1 deletions
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4
drivers/media/usb/go7007/go7007-usb.c
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@ -1201,7 +1201,9 @@ 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;