From: Colin Ian King Date: Tue, 5 Sep 2017 18:15:50 +0000 (+0100) Subject: b43: fix unitialized reads of ret by initializing the array to zero X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e31fbe1034d9066cfff0d0a4f7ce440ddf75643f;p=linux.git b43: fix unitialized reads of ret by initializing the array to zero The u8 char array ret is not being initialized and elements outside the range start to end contain just garbage values from the stack. This results in a later scan of the array to read potentially uninitialized values. Fix this by initializing the array to zero. This seems to have been an issue since the very first commit. Detected by CoverityScan CID#139652 ("Uninitialized scalar variable") Signed-off-by: Colin Ian King Reviewed-by: Michael Buesch Signed-off-by: Kalle Valo --- diff --git a/drivers/net/wireless/broadcom/b43/phy_g.c b/drivers/net/wireless/broadcom/b43/phy_g.c index 822dcaa8ace63..f59c021664626 100644 --- a/drivers/net/wireless/broadcom/b43/phy_g.c +++ b/drivers/net/wireless/broadcom/b43/phy_g.c @@ -2297,7 +2297,7 @@ static u8 b43_gphy_aci_detect(struct b43_wldev *dev, u8 channel) static u8 b43_gphy_aci_scan(struct b43_wldev *dev) { struct b43_phy *phy = &dev->phy; - u8 ret[13]; + u8 ret[13] = { 0 }; unsigned int channel = phy->channel; unsigned int i, j, start, end;