This is a note to let you know that I've just added the patch titled
net/ieee802154: reject zero-sized raw_sendmsg()
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-ieee802154-reject-zero-sized-raw_sendmsg.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit eb13284e2fddc4123ade1f516ad40797110e95c0
Author: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Date: Sun Oct 2 01:43:44 2022 +0900
net/ieee802154: reject zero-sized raw_sendmsg()
[ Upstream commit 3a4d061c699bd3eedc80dc97a4b2a2e1af83c6f5 ]
syzbot is hitting skb_assert_len() warning at raw_sendmsg() for ieee802154
socket. What commit dc633700f00f726e ("net/af_packet: check len when
min_header_len equals to 0") does also applies to ieee802154 socket.
Link: https://syzkaller.appspot.com/bug?extid=5ea725c25d06fb9114c4
Reported-by: syzbot <syzbot+5ea725c25d06fb9114c4@xxxxxxxxxxxxxxxxxxxxxxxxx>
Fixes: fd1894224407c484 ("bpf: Don't redirect packets with invalid pkt_len")
Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index 7edec210780a..d4c162d63634 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -252,6 +252,9 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
return -EOPNOTSUPP;
}
+ if (!size)
+ return -EINVAL;
+
lock_sock(sk);
if (!sk->sk_bound_dev_if)
dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
