From mboxrd@z Thu Jan 1 00:00:00 1970 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 5FA5AC76196 for ; Sat, 1 Apr 2023 04:43:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233342AbjDAEkV (ORCPT ); Sat, 1 Apr 2023 00:40:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229850AbjDAEkU (ORCPT ); Sat, 1 Apr 2023 00:40:20 -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 E72A1C669 for ; Fri, 31 Mar 2023 21:40:19 -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 A1E71B83360 for ; Sat, 1 Apr 2023 04:40:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 51EE5C4339B; Sat, 1 Apr 2023 04:40:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1680324017; bh=OK4VeE5mCiT7lYTTMWBQp8uc0RXbXR4/J8OqtaYw7Yw=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=ZFJusxcE3JMUUCDA/ylzrEUnsWaxQ3iVSDd8vlVhB/fLY7SqiCDjGFdN9fY/tsjHq bRkBPdlHgmqZ+8sdwU2WWWI8Xh1K9Q/pVVCbgBQ515c7uaQptpLnW6X9kEcO38kdJ0 p1dRCBzoAF3cWXEivFW0yiO1v8pLFFmxkhxboQfNIXzVqrW3AHITXJsZK4SevjwYy+ UT54XyCI+4ccIFGD/utIngdnyXzfydXRnpT6TYcN9Ia4QQVxfrmdyz5jCSL1iTfiXf TcqYAnPx3FN7nt25wShnNtXzxcM/Po05a5ZsZc2CNg4pjZfvRDmpgaoRxAmi15aQAn eqEcYJPQJqw6w== Received: from aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (Postfix) with ESMTP id 38D22E21EE4; Sat, 1 Apr 2023 04:40:17 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net] icmp: guard against too small mtu From: patchwork-bot+netdevbpf@kernel.org Message-Id: <168032401722.15847.13805989572906204547.git-patchwork-notify@kernel.org> Date: Sat, 01 Apr 2023 04:40:17 +0000 References: <20230330174502.1915328-1-edumazet@google.com> In-Reply-To: <20230330174502.1915328-1-edumazet@google.com> To: Eric Dumazet Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, dsahern@kernel.org, netdev@vger.kernel.org, eric.dumazet@gmail.com, syzbot+d373d60fddbdc915e666@syzkaller.appspotmail.com Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Thu, 30 Mar 2023 17:45:02 +0000 you wrote: > syzbot was able to trigger a panic [1] in icmp_glue_bits(), or > more exactly in skb_copy_and_csum_bits() > > There is no repro yet, but I think the issue is that syzbot > manages to lower device mtu to a small value, fooling __icmp_send() > > __icmp_send() must make sure there is enough room for the > packet to include at least the headers. > > [...] Here is the summary with links: - [net] icmp: guard against too small mtu https://git.kernel.org/netdev/net/c/7d63b6712538 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html