From: Phillip Potter phil@philpotter.co.uk
commit bd78980be1a68d14524c51c4b4170782fada622b upstream.
Use memset to initialize local array in drivers/net/usb/ax88179_178a.c, and also set a local u16 and u32 variable to 0. Fixes a KMSAN found uninit-value bug reported by syzbot at: https://syzkaller.appspot.com/bug?id=00371c73c72f72487c1d0bfe0cc9d00de339d5a...
Reported-by: syzbot+4993e4a0e237f1b53747@syzkaller.appspotmail.com Signed-off-by: Phillip Potter phil@philpotter.co.uk Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/usb/ax88179_178a.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/usb/ax88179_178a.c +++ b/drivers/net/usb/ax88179_178a.c @@ -295,12 +295,12 @@ static int ax88179_read_cmd(struct usbne int ret;
if (2 == size) { - u16 buf; + u16 buf = 0; ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 0); le16_to_cpus(&buf); *((u16 *)data) = buf; } else if (4 == size) { - u32 buf; + u32 buf = 0; ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 0); le32_to_cpus(&buf); *((u32 *)data) = buf;