From: Muhammad Usama Anjum musamaanjum@gmail.com
[ Upstream commit 0ae10a7dc8992ee682ff0b1752ff7c83d472eef1 ]
If some error occurs, URB buffers should also be freed. If they aren't freed with the dvb here, the em28xx_dvb_fini call doesn't frees the URB buffers as dvb is set to NULL. The function in which error occurs should do all the cleanup for the allocations it had done.
Tested the patch with the reproducer provided by syzbot. This patch fixes the memleak.
Reported-by: syzbot+889397c820fa56adf25d@syzkaller.appspotmail.com Signed-off-by: Muhammad Usama Anjum musamaanjum@gmail.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/usb/em28xx/em28xx-dvb.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c b/drivers/media/usb/em28xx/em28xx-dvb.c index a73faf12f7e4..e1946237ac8c 100644 --- a/drivers/media/usb/em28xx/em28xx-dvb.c +++ b/drivers/media/usb/em28xx/em28xx-dvb.c @@ -1924,6 +1924,7 @@ static int em28xx_dvb_init(struct em28xx *dev) return result;
out_free: + em28xx_uninit_usb_xfer(dev, EM28XX_DIGITAL_MODE); kfree(dvb); dev->dvb = NULL; goto ret;