From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org by pdx-caf-mail.web.codeaurora.org (Dovecot) with LMTP id eaUmFmRrGVu3QwAAmS7hNA ; Thu, 07 Jun 2018 17:29:08 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 4ABB0608B8; Thu, 7 Jun 2018 17:29:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.4 required=2.0 tests=BAYES_00,FROM_LOCAL_HEX, MAILING_LIST_MULTI,SORTED_RECIPS autolearn=no autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by smtp.codeaurora.org (Postfix) with ESMTP id AD2D5601B4; Thu, 7 Jun 2018 17:29:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org AD2D5601B4 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753785AbeFGR3F (ORCPT + 25 others); Thu, 7 Jun 2018 13:29:05 -0400 Received: from mail-io0-f197.google.com ([209.85.223.197]:55831 "EHLO mail-io0-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753420AbeFGR3D (ORCPT ); Thu, 7 Jun 2018 13:29:03 -0400 Received: by mail-io0-f197.google.com with SMTP id a10-v6so7907607iod.22 for ; Thu, 07 Jun 2018 10:29:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=SnpyGzOAjsUmFoYKV7YOFiVjxVy1qE9EEnle3AuBVKM=; b=Rk+bE44/57HdWKiQrvCC/MfOXElJOA5gI2Qar0c6qOP/TVvNZDQYmCNZ4zr5f3enBa WTLeXEG+ViBYW12B2lvj6mebJVqbO+SVsJkxeFvvvggAB21+nnNS0Fxvl49YxgwISS40 q/QB2pBvp9+suBribOD1JOpUAERLf4kjJnDuowXvED1DxEX229+tJyDdxN8Y6Ml0pBXa K17S6iH82jmoyc8p5YyzryeulA1luPR8RAkAOB1CNBpUZfFuCQBWiyG2uTv31u+SveHh gywZ+iuhIrXfb/jMb8h/OJzukQ3O76jmehFHfT9/HLwvLz0v01Q0vGI+H8jH5v6dleoC 7n7g== X-Gm-Message-State: APt69E19R7Qiq9M9fu626eG7h+L0BMFZHff/4xsQBR+4+vi37/u0fw5F xOZ6qKotsLK+2IFr1pn7oG5Uc4NjvUwW4VfSzB+bCf3zCVln X-Google-Smtp-Source: ADUXVKIjFcHDcIugqNS627Zn6WmG7r8PO/BE3spgV0490vdhI/KpkeXdXQTAf5CJEc3rFzG/XkAlbaYl4VROZ2IuIkRBJezIH0xf MIME-Version: 1.0 X-Received: by 2002:a6b:dc01:: with SMTP id s1-v6mr1215073ioc.111.1528392542988; Thu, 07 Jun 2018 10:29:02 -0700 (PDT) Date: Thu, 07 Jun 2018 10:29:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009a3b5b056e109e42@google.com> Subject: KMSAN: uninit-value in ebt_stp_mt_check (2) From: syzbot To: bridge@lists.linux-foundation.org, coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, kadlec@blackhole.kfki.hu, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, stephen@networkplumber.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: c6a6aed994b6 kmsan: remove dead code to trigger syzbot build git tree: https://github.com/google/kmsan.git/master console output: https://syzkaller.appspot.com/x/log.txt?x=17bde74f800000 kernel config: https://syzkaller.appspot.com/x/.config?x=848e40757852af3e dashboard link: https://syzkaller.appspot.com/bug?extid=da4494182233c23a5fcf compiler: clang version 7.0.0 (trunk 334104) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+da4494182233c23a5fcf@syzkaller.appspotmail.com ================================================================== BUG: KMSAN: uninit-value in ebt_stp_mt_check+0x24b/0x450 net/bridge/netfilter/ebt_stp.c:162 CPU: 0 PID: 12006 Comm: syz-executor7 Not tainted 4.17.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x149/0x260 mm/kmsan/kmsan.c:1084 __msan_warning_32+0x6e/0xc0 mm/kmsan/kmsan_instr.c:620 ebt_stp_mt_check+0x24b/0x450 net/bridge/netfilter/ebt_stp.c:162 xt_check_match+0x1438/0x1650 net/netfilter/x_tables.c:506 ebt_check_match net/bridge/netfilter/ebtables.c:372 [inline] ebt_check_entry net/bridge/netfilter/ebtables.c:702 [inline] translate_table+0x4e88/0x6120 net/bridge/netfilter/ebtables.c:943 do_replace_finish+0x1258/0x2ea0 net/bridge/netfilter/ebtables.c:999 do_replace+0x719/0x780 net/bridge/netfilter/ebtables.c:1138 do_ebt_set_ctl+0x2ab/0x3c0 net/bridge/netfilter/ebtables.c:1517 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x47c/0x4e0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x24b/0x2b0 net/ipv4/ip_sockglue.c:1251 udp_setsockopt+0x108/0x1b0 net/ipv4/udp.c:2416 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3039 __sys_setsockopt+0x496/0x540 net/socket.c:1903 __do_sys_setsockopt net/socket.c:1914 [inline] __se_sys_setsockopt net/socket.c:1911 [inline] __x64_sys_setsockopt+0x15c/0x1c0 net/socket.c:1911 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4559f9 RSP: 002b:00007f45b9246c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f45b92476d4 RCX: 00000000004559f9 RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000300 R09: 0000000000000000 R10: 0000000020000480 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c0d6d R14: 00000000004d07c8 R15: 0000000000000000 Local variable description: ----mtpar.i@translate_table Variable was created at: translate_table+0xbb/0x6120 net/bridge/netfilter/ebtables.c:831 do_replace_finish+0x1258/0x2ea0 net/bridge/netfilter/ebtables.c:999 ================================================================== --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.