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 X-Spam-Level: X-Spam-Status: No, score=-13.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_PASS,T_DKIMWL_WL_MED,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1765DC04AB2 for ; Thu, 9 May 2019 12:52:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D110F2053B for ; Thu, 9 May 2019 12:52:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="gVTdX/+A" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726743AbfEIMwg (ORCPT ); Thu, 9 May 2019 08:52:36 -0400 Received: from mail-it1-f196.google.com ([209.85.166.196]:39957 "EHLO mail-it1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726448AbfEIMwg (ORCPT ); Thu, 9 May 2019 08:52:36 -0400 Received: by mail-it1-f196.google.com with SMTP id g71so3115909ita.5 for ; Thu, 09 May 2019 05:52:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=sD/4d5nN7WRBU0Y3WW7mkSq3V4OLzWNzOx10r/GN1Sw=; b=gVTdX/+ADY2e/AY2qKiWjxssWkzkc66M9+Jya4DDPYaGIv+JnssZMv8ehXAp14owq9 6MFl/8xnX41wJpZHTqQJ8xGnox0S8qFvDGkD2+qzy3ktig1Kp1peEkZGsapJRJDweNx7 2+qZmL3DyytrzDgriEzORxijA/YXnrXtRHu+ZRYUNELgPK2cW6aXmGYrHPLjGM+bhmyK OAmQ1NtMKcb9P54ZSIMZmfXX9Y+1bl34fSA7gtTt7oz3B6LjFFBx1rPDGKrjcjaC7UWa CicmRvmGBrr8/uIHjG+RYafGwvrIgsvwawCA9R36JXTGGIig/idBIqTdf/G4zJ0bSvtj 37nA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=sD/4d5nN7WRBU0Y3WW7mkSq3V4OLzWNzOx10r/GN1Sw=; b=FM+HeOcoJXFzrlYx4ZY0hbMD2JmdkEPH9Cm0zCjsbONGyGZZ7dspVOo3Yv9TLyYQQS oUTiwy430fE0tMy/WYVVIcmJdn4iUvkUKakT9cXaCYo036aBa0Seked9Kzc+5cshzEng mStCXQbncXLowosf7bDPxN4J9VXmOpF1CKZNJ9uYYRjsNSU36FMhzOBHf3TpjII5od9m LDI3DFy28p8+Hn+QlVfXb2F8KX12PrC0Au+U+ZK3ut45+bdAnK/iMNIjVJ2kG4tYPX4A fFwHgrsDvqlACbgZWgUhJXgnipSbtDzrAHlTokiSB00YW/orGzNEILGPZUxefi//5/Bz VHkg== X-Gm-Message-State: APjAAAVMlnidwsv08gwQjQtZH56t+l9Ch+Pc7I9/5uTMXAUzGBDb1BPM EA2VJyuuFN7D10pJH9o/t4E+eLoTvPJ12n327zSXMg== X-Google-Smtp-Source: APXvYqxJzo6davw/GDhhNkyeCq6Qq7aeKZ4SiKMNerQ2IXXU3EL+sSf/hWC+gdl+DSmf4UswMlpUR7Q4FUKN7+wltMo= X-Received: by 2002:a05:660c:10f:: with SMTP id w15mr2554328itj.166.1557406355048; Thu, 09 May 2019 05:52:35 -0700 (PDT) MIME-Version: 1.0 References: <000000000000f10885058873bf83@google.com> In-Reply-To: <000000000000f10885058873bf83@google.com> From: Dmitry Vyukov Date: Thu, 9 May 2019 14:52:23 +0200 Message-ID: Subject: Re: BUG: unable to handle page fault for address: ADDR To: syzbot Cc: David Miller , Alexey Kuznetsov , LKML , netdev , syzkaller-bugs , Hideaki YOSHIFUJI Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: syzbot Date: Thu, May 9, 2019 at 2:40 PM To: , , , , , > Hello, > > syzbot found the following crash on: > > HEAD commit: 80f23212 Merge git://git.kernel.org/pub/scm/linux/kernel/g.. > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=112de0d8a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=40a58b399941db7e > dashboard link: https://syzkaller.appspot.com/bug?extid=208b9694ae6aee1c7197 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > 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+208b9694ae6aee1c7197@syzkaller.appspotmail.com Kernel has changed format of crash messages, but otherwise this is #syz dup: BUG: unable to handle kernel paging request in iptunnel_xmit https://syzkaller.appspot.com/bug?extid=61816a2458fec4918227 https://groups.google.com/forum/#!msg/syzkaller-bugs/dOzIJi3RjfY/buHkKqxgEgAJ Reported in December, still happens. > New replicast peer: 172.20.20.187 > BUG: unable to handle page fault for address: ffffde202758ca0b > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > PGD 0 P4D 0 > Oops: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 17591 Comm: syz-executor.3 Not tainted 5.1.0+ #3 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline] > RIP: 0010:iptunnel_xmit+0x6e5/0x970 net/ipv4/ip_tunnel_core.c:94 > Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 70 6e 88 48 b8 > 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f > 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00 > RSP: 0018:ffff8880a0fb7008 EFLAGS: 00010a02 > RAX: dffffc0000000000 RBX: ffff11013ac65040 RCX: 1ffffffff10dce0c > RDX: 1fffe2202758ca0b RSI: ffffffff83344b4c RDI: ffff11013ac65058 > RBP: ffff8880a0fb7068 R08: ffff888059df8140 R09: ffffed1015d06be0 > R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: 00000000000000fc > R13: ffff88806bbfec40 R14: ffff88806a6a3714 R15: ffff8880a097a8c0 > FS: 00007fcf84ffc700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffde202758ca0b CR3: 00000000970bb000 CR4: 00000000001406f0 > Call Trace: > udp_tunnel_xmit_skb+0x236/0x310 net/ipv4/udp_tunnel.c:191 > tipc_udp_xmit.isra.0+0x805/0xcc0 net/tipc/udp_media.c:181 > tipc_udp_send_msg+0x295/0x4a0 net/tipc/udp_media.c:247 > tipc_bearer_xmit_skb+0x172/0x360 net/tipc/bearer.c:503 > tipc_enable_bearer+0xac4/0xd20 net/tipc/bearer.c:328 > __tipc_nl_bearer_enable+0x2de/0x3a0 net/tipc/bearer.c:899 > tipc_nl_bearer_enable+0x23/0x40 net/tipc/bearer.c:907 > genl_family_rcv_msg+0x753/0xf90 net/netlink/genetlink.c:629 > genl_rcv_msg+0xca/0x16c net/netlink/genetlink.c:654 > netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2486 > genl_rcv+0x29/0x40 net/netlink/genetlink.c:665 > netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] > netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1337 > netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1926 > sock_sendmsg_nosec net/socket.c:660 [inline] > sock_sendmsg+0x12e/0x170 net/socket.c:671 > ___sys_sendmsg+0x81d/0x960 net/socket.c:2292 > __sys_sendmsg+0x105/0x1d0 net/socket.c:2330 > __do_sys_sendmsg net/socket.c:2339 [inline] > __se_sys_sendmsg net/socket.c:2337 [inline] > __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2337 > do_syscall_64+0x103/0x670 arch/x86/entry/common.c:298 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x458da9 > Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 > 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff > ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007fcf84ffbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 > RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 > RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcf84ffc6d4 > R13: 00000000004c6449 R14: 00000000004dad18 R15: 00000000ffffffff > Modules linked in: > CR2: ffffde202758ca0b > ---[ end trace 7b8973c639719d58 ]--- > RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline] > RIP: 0010:iptunnel_xmit+0x6e5/0x970 net/ipv4/ip_tunnel_core.c:94 > Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 70 6e 88 48 b8 > 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f > 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00 > RSP: 0018:ffff8880a0fb7008 EFLAGS: 00010a02 > RAX: dffffc0000000000 RBX: ffff11013ac65040 RCX: 1ffffffff10dce0c > RDX: 1fffe2202758ca0b RSI: ffffffff83344b4c RDI: ffff11013ac65058 > RBP: ffff8880a0fb7068 R08: ffff888059df8140 R09: ffffed1015d06be0 > R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: 00000000000000fc > R13: ffff88806bbfec40 R14: ffff88806a6a3714 R15: ffff8880a097a8c0 > FS: 00007fcf84ffc700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffde202758ca0b CR3: 00000000970bb000 CR4: 00000000001406f0 > > > --- > 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#status for how to communicate with syzbot. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000f10885058873bf83%40google.com. > For more options, visit https://groups.google.com/d/optout.