From: Alexander Aring Date: Fri, 17 Feb 2023 04:25:04 +0000 (-0500) Subject: ca8210: fix mac_len negative array access X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=6c993779ea1d0cccdb3a5d7d45446dd229e610a3;p=users%2Fjedix%2Flinux-maple.git ca8210: fix mac_len negative array access This patch fixes a buffer overflow access of skb->data if ieee802154_hdr_peek_addrs() fails. Reported-by: lianhui tang Signed-off-by: Alexander Aring Link: https://lore.kernel.org/r/20230217042504.3303396-1-aahringo@redhat.com Signed-off-by: Stefan Schmidt --- diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c index e1a569b99e4a..0b0c6c0764fe 100644 --- a/drivers/net/ieee802154/ca8210.c +++ b/drivers/net/ieee802154/ca8210.c @@ -1913,6 +1913,8 @@ static int ca8210_skb_tx( * packet */ mac_len = ieee802154_hdr_peek_addrs(skb, &header); + if (mac_len < 0) + return mac_len; secspec.security_level = header.sec.level; secspec.key_id_mode = header.sec.key_id_mode;