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net/ieee802154: reject zero-sized raw_sendmsg()

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[ 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@syzkaller.appspotmail.com>
Fixes: fd1894224407c484 ("bpf: Don't redirect packets with invalid pkt_len")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tetsuo Handa 2022-10-02 01:43:44 +09:00 committed by Greg Kroah-Hartman
parent 71e0ab5b75
commit 03ac583eef
1 changed files with 3 additions and 0 deletions
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3
net/ieee802154/socket.c
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@ -252,6 +252,9 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
return -EOPNOTSUPP; return -EOPNOTSUPP;
} }
if (!size)
return -EINVAL;
lock_sock(sk); lock_sock(sk);
if (!sk->sk_bound_dev_if) if (!sk->sk_bound_dev_if)
dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);