4.4-stable review patch. If anyone has any objections, please let me know.
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From: Arvind Yadav arvind.yadav.cs@gmail.com
commit 58fd55e838276a0c13d1dc7c387f90f25063cbf3 upstream.
It seems that the return value of usb_ifnum_to_if() can be NULL and needs to be checked.
Signed-off-by: Arvind Yadav arvind.yadav.cs@gmail.com Tested-by: Andrey Konovalov andreyknvl@google.com Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab@osg.samsung.com Cc: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/rc/imon.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/media/rc/imon.c +++ b/drivers/media/rc/imon.c @@ -2419,6 +2419,11 @@ static int imon_probe(struct usb_interfa mutex_lock(&driver_lock);
first_if = usb_ifnum_to_if(usbdev, 0); + if (!first_if) { + ret = -ENODEV; + goto fail; + } + first_if_ctx = usb_get_intfdata(first_if);
if (ifnum == 0) {