From: Alexander Aring <aahringo@xxxxxxxxxx> [ Upstream commit 6c993779ea1d0cccdb3a5d7d45446dd229e610a3 ] This patch fixes a buffer overflow access of skb->data if ieee802154_hdr_peek_addrs() fails. Reported-by: lianhui tang <bluetlh@xxxxxxxxx> Signed-off-by: Alexander Aring <aahringo@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230217042504.3303396-1-aahringo@xxxxxxxxxx Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 e1a569b99e4a6..0b0c6c0764fe9 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; -- 2.39.2
