[PATCH AUTOSEL 4.14 2/9] ca8210: fix mac_len negative array access
From: Sasha Levin <sashal@kernel.org>
Date: 2023-03-20 01:39:58
Also in:
lkml, stable
Subsystem:
ca8210 ieee-802.15.4 radio driver, ieee 802.15.4 subsystem, networking drivers, the rest · Maintainers:
Alexander Aring, Stefan Schmidt, Miquel Raynal, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Alexander Aring <aahringo@redhat.com> [ Upstream commit 6c993779ea1d0cccdb3a5d7d45446dd229e610a3 ] This patch fixes a buffer overflow access of skb->data if ieee802154_hdr_peek_addrs() fails. Reported-by: lianhui tang <redacted> Signed-off-by: Alexander Aring <aahringo@redhat.com> Link: https://lore.kernel.org/r/20230217042504.3303396-1-aahringo@redhat.com Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 eff7571dbea20..76ca8c63bc379 100644
--- a/drivers/net/ieee802154/ca8210.c
+++ b/drivers/net/ieee802154/ca8210.c@@ -1955,6 +1955,8 @@ 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