From nobody Fri Oct 17 10:32:19 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFC1DC4321E for ; Wed, 19 Oct 2022 10:40:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231259AbiJSKkV (ORCPT ); Wed, 19 Oct 2022 06:40:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230415AbiJSKj1 (ORCPT ); Wed, 19 Oct 2022 06:39:27 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFD7F15627F; Wed, 19 Oct 2022 03:18:18 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 4B89DB823C8; Wed, 19 Oct 2022 08:55:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98EB4C433D6; Wed, 19 Oct 2022 08:55:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666169703; bh=4skOxrJgX4AfIkPHOIg87BN7DK+WMUVYiGNtnr5td+c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=093RJ8ktsEQMpHiblS+LnEmpjvMXUc2QOaZ4OJ6G3IvjWvrocnaQJC7EmmapVvHPX +Fl81fWxUiRslFpOIMv2+NItddXdxH3D3QOR4LmP9k36QfYAWgW0L+56I0tjSNasqc WhSXxUrHiiNJ65DXGlMB0h3q8QDnYnQrNF8ySN2o= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot , Tetsuo Handa , "David S. Miller" , Sasha Levin Subject: [PATCH 6.0 343/862] net/ieee802154: reject zero-sized raw_sendmsg() Date: Wed, 19 Oct 2022 10:27:10 +0200 Message-Id: <20221019083305.219389595@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221019083249.951566199@linuxfoundation.org> References: <20221019083249.951566199@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Tetsuo Handa [ 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=3D5ea725c25d06fb9114c4 Reported-by: syzbot Fixes: fd1894224407c484 ("bpf: Don't redirect packets with invalid pkt_len") Signed-off-by: Tetsuo Handa Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/ieee802154/socket.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c index 7889e1ef7fad..cbd0e2ac4ffe 100644 --- a/net/ieee802154/socket.c +++ b/net/ieee802154/socket.c @@ -251,6 +251,9 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *= msg, size_t size) return -EOPNOTSUPP; } =20 + if (!size) + return -EINVAL; + lock_sock(sk); if (!sk->sk_bound_dev_if) dev =3D dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); --=20 2.35.1