From 5da4469a7aa011de614c3e2ae383c35a353a382e Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Thu, 16 Feb 2023 23:25:04 -0500 Subject: [PATCH] ca8210: fix mac_len negative array access [ Upstream commit 6c993779ea1d0cccdb3a5d7d45446dd229e610a3 ] 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 Signed-off-by: Sasha Levin --- drivers/net/ieee802154/ca8210.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c index 917edb3d04b7..2d4471b77fa7 100644 --- a/drivers/net/ieee802154/ca8210.c +++ b/drivers/net/ieee802154/ca8210.c @@ -1954,6 +1954,8 @@ 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;