From: Dongliang Mu mudongliangabcd@gmail.com
[ Upstream commit 23bc5eb55f8c9607965c20d9ddcc13cb1ae59568 ]
The commit ca9dc8d06ab6 ("media: airspy: respect the DMA coherency rules") moves variable buf from stack to heap, however, it only frees buf in the error handling code, missing deallocation in the success path.
Fix this by freeing buf in the success path since this variable does not have any references in other code.
Fixes: ca9dc8d06ab6 ("media: airspy: respect the DMA coherency rules") Reported-by: syzbot+bb25f85e5aa482864dc0@syzkaller.appspotmail.com Signed-off-by: Dongliang Mu mudongliangabcd@gmail.com Reviewed-by: Tommaso Merciai tommaso.merciai@amarulasolution.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/usb/airspy/airspy.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/media/usb/airspy/airspy.c b/drivers/media/usb/airspy/airspy.c index 240a7cc56777..7b1c40132555 100644 --- a/drivers/media/usb/airspy/airspy.c +++ b/drivers/media/usb/airspy/airspy.c @@ -1070,6 +1070,10 @@ static int airspy_probe(struct usb_interface *intf, ret); goto err_free_controls; } + + /* Free buf if success*/ + kfree(buf); + dev_info(s->dev, "Registered as %s\n", video_device_node_name(&s->vdev)); dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n");