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media: dvb-usb/dvb-usb-urb.c: initialize actlen to 0 

commit 569bc8d6a6 upstream.

This fixes a syzbot failure since actlen could be uninitialized,
but it was still used.

Syzbot link:

https://syzkaller.appspot.com/bug?extid=6bf9606ee955b646c0e1

Reported-and-tested-by: syzbot+6bf9606ee955b646c0e1@syzkaller.appspotmail.com

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Hans Verkuil 2019-11-12 10:22:28 +01:00 committed by Greg Kroah-Hartman
parent f416aac94c
commit 81b3fd0cb4
1 changed files with 1 additions and 1 deletions
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2
drivers/media/usb/dvb-usb/dvb-usb-urb.c
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@ -12,7 +12,7 @@
int dvb_usb_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
u16 rlen, int delay_ms)
{
int actlen,ret = -ENOMEM;
int actlen = 0, ret = -ENOMEM;
if (!d || wbuf == NULL || wlen == 0)
return -EINVAL;