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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 831A6C352A3 for ; Tue, 11 Feb 2020 16:06:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 622D120873 for ; Tue, 11 Feb 2020 16:06:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730753AbgBKQGM (ORCPT ); Tue, 11 Feb 2020 11:06:12 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:56486 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729412AbgBKQGL (ORCPT ); Tue, 11 Feb 2020 11:06:11 -0500 Received: by mail-io1-f70.google.com with SMTP id d13so7216930ioo.23 for ; Tue, 11 Feb 2020 08:06:10 -0800 (PST) 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=Jdoz05JAAw+9K6HAuWNyOVTPMvhxyYRmEKIP8cTLjUA=; b=sk6kFNRhCvCjDXL/P1y1Cu0LnZY7n/uEHDEA+x9t0C01VAtzFcGB0ZCzO7n53Y0whe 1/v762tTXt2Gj9Kx/hiUVYWq+Gw5ClShUY7hFSlZh1z1tNiotg8MycOPUc826EP5olOY OTTOIMoDS7ZT/IAUFPcrvZ6n3S8jUvPhkPp3EZSKawUEBpiYX4gAa2Wv0fK/x+XbeFWl JUdPbjWHC4CXnDNp2Q6xVBF35vKquCiJDe5B/HJW7gIm0gpmKvxSv0M5yw8RAldvfhKw Kq+qf/cCa9n6Gysfsmc5XQKjrAjonWGrl9ivOYkh6eh/GrFQHCOd0OghXRTSQMDk5Rfm P+Vg== X-Gm-Message-State: APjAAAXrzutNADWxYSB40wenv2FSEHiAw36sEpdRsrFDpbt5yJTolaq/ nk+WLIY05zbmHjE6iI1Dori9pa46l0WxyPZ2orR7jWbnOZ9n X-Google-Smtp-Source: APXvYqynHf3OEs4Q7nFiEkAHlhoE3vw/BAvA5frqHvj6nn+PEKRsD7ZEggL5lc2dfMXJ9M0izXdgr3AaxDjhk4SZAOJOBt9p3tCz MIME-Version: 1.0 X-Received: by 2002:a02:cd0d:: with SMTP id g13mr15627399jaq.110.1581437170301; Tue, 11 Feb 2020 08:06:10 -0800 (PST) Date: Tue, 11 Feb 2020 08:06:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c54420059e4f08ff@google.com> Subject: WARNING in dev_change_net_namespace From: syzbot To: andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, hawk@kernel.org, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, kuba@kernel.org, linux-kernel@vger.kernel.org, mkubecek@suse.cz, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com 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 Hello, syzbot found the following crash on: HEAD commit: 0a679e13 Merge branch 'for-5.6-fixes' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15142701e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=6780df5a5f208964 dashboard link: https://syzkaller.appspot.com/bug?extid=830c6dbfc71edc4f0b8f compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) 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+830c6dbfc71edc4f0b8f@syzkaller.appspotmail.com RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 R13: 00000000000009cb R14: 00000000004cb3dd R15: 0000000000000016 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 24839 at net/core/dev.c:10108 dev_change_net_namespace+0x155f/0x16b0 net/core/dev.c:10108 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 24839 Comm: syz-executor.4 Not tainted 5.6.0-rc1-syzkaller #0 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+0x1fb/0x318 lib/dump_stack.c:118 panic+0x264/0x7a9 kernel/panic.c:221 __warn+0x209/0x210 kernel/panic.c:582 report_bug+0x1b6/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0xcf/0x1c0 arch/x86/kernel/traps.c:267 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:dev_change_net_namespace+0x155f/0x16b0 net/core/dev.c:10108 Code: b7 f9 02 01 48 c7 c7 5d 66 e6 88 48 c7 c6 b4 42 04 89 ba 25 27 00 00 31 c0 e8 6d a6 dc fa 0f 0b e9 0d eb ff ff e8 a1 e6 0a fb <0f> 0b e9 2f fe ff ff e8 95 e6 0a fb c6 05 05 b7 f9 02 01 48 c7 c7 RSP: 0018:ffffc90001ae7140 EFLAGS: 00010246 RAX: ffffffff866c18df RBX: 00000000fffffff4 RCX: 0000000000040000 RDX: ffffc90012028000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90001ae7240 R08: ffffffff866c1700 R09: fffffbfff1406318 R10: fffffbfff1406318 R11: 0000000000000000 R12: ffff8880918d2b60 R13: ffff8880918d20b8 R14: ffffc90001ae71e8 R15: ffffc90001ae71e0 do_setlink+0x196/0x3880 net/core/rtnetlink.c:2501 __rtnl_newlink net/core/rtnetlink.c:3252 [inline] rtnl_newlink+0x1509/0x1c00 net/core/rtnetlink.c:3377 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5438 netlink_rcv_skb+0x19e/0x3e0 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5456 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x766/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2b/0xd40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b3b9 Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f483611ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f483611b6d4 RCX: 000000000045b3b9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 R13: 00000000000009cb R14: 00000000004cb3dd R15: 0000000000000016 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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.