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 bluetlh@gmail.com 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 0362917fce7a9..e2322bc3a4e9a 100644 --- a/drivers/net/ieee802154/ca8210.c +++ b/drivers/net/ieee802154/ca8210.c @@ -1956,6 +1956,8 @@ 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;