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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 D9CF3C10F13 for ; Sun, 14 Apr 2019 11:29:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B1A1920848 for ; Sun, 14 Apr 2019 11:29:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727137AbfDNL3G (ORCPT ); Sun, 14 Apr 2019 07:29:06 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:42552 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725805AbfDNL3F (ORCPT ); Sun, 14 Apr 2019 07:29:05 -0400 Received: by mail-io1-f70.google.com with SMTP id i1so11964401ioq.9 for ; Sun, 14 Apr 2019 04:29:05 -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=8FmG59vyk1AuyVAdyHhu7qqIp2vnqAtjpaWeZTBXlHo=; b=s8Oq2PcIXPvdi6TTWdqkyEz9KBT7bCYflRJEjINEMdMLXjOjdsmSvLLOwIprj1zCAR JVgRMLCgtewbAPsp2oPlXXKgxRfyG8ozyD3XuAcBhq2t1eEv4ecX6kSpSeFHMeuzUs5E cYgJaSEbOxJ/6QQ9U3B0Lrux/fP0abkUhZ4SYpvoflmXH5TAHSGM8H0gMeHqClZDb/Sp biyphvgMz+pBDOp+4+odP7Vs9+tIJhMVdTO1O3TsPHHQ+HvDuj8VDbr5ApgHAK+oTAQN M7p6z2I/DI0ixUyiVnabcO1jMWVaCS5MgH0LjJN6Mk/rJRdH7/Twlyo7ZGu38x9tFFo9 m4Nw== X-Gm-Message-State: APjAAAW+1pfO9WuVC9xUHXd7FNWAbpqh9SLXiZVVX2Es8Tu3XxBG/4Hc i+4SQPKfvyoRCWBwadpNGM04lRlmOrlWT/k4qdHVNxvRQpLW X-Google-Smtp-Source: APXvYqzoAvU9ZOmCASjSwiyybt8FcG2BlSJAgjKiwScVQYRMLQzZCBF1WUDYtPE78kL3sy6WjvYJqt7tsn1fQYdQG7tIDkX3BaMk MIME-Version: 1.0 X-Received: by 2002:a6b:bc06:: with SMTP id m6mr1508942iof.18.1555241345009; Sun, 14 Apr 2019 04:29:05 -0700 (PDT) Date: Sun, 14 Apr 2019 04:29:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e8cf3805867bd715@google.com> Subject: WARNING: locking bug in lock_sock_nested From: syzbot To: davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, yoshfuji@linux-ipv6.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 2d06b235 Merge tag 'for-5.1-rc4-tag' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1521ba9f200000 kernel config: https://syzkaller.appspot.com/x/.config?x=4fb64439e07a1ec0 dashboard link: https://syzkaller.appspot.com/bug?extid=605a69fff339d9cc221e 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+605a69fff339d9cc221e@syzkaller.appspotmail.com WARNING: CPU: 1 PID: 24536 at kernel/locking/lockdep.c:746 arch_local_save_flags arch/x86/include/asm/paravirt.h:762 [inline] WARNING: CPU: 1 PID: 24536 at kernel/locking/lockdep.c:746 arch_local_save_flags arch/x86/include/asm/paravirt.h:760 [inline] WARNING: CPU: 1 PID: 24536 at kernel/locking/lockdep.c:746 look_up_lock_class kernel/locking/lockdep.c:737 [inline] WARNING: CPU: 1 PID: 24536 at kernel/locking/lockdep.c:746 register_lock_class+0xe10/0x1860 kernel/locking/lockdep.c:1090 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 24536 Comm: syz-executor.5 Not tainted 5.1.0-rc4+ #63 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+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 __warn.cold+0x20/0x45 kernel/panic.c:571 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:746 [inline] RIP: 0010:register_lock_class+0xe10/0x1860 kernel/locking/lockdep.c:1090 Code: 00 48 89 da 4d 8b 76 c0 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 23 07 00 00 4c 89 33 e9 e3 f4 ff ff 0f 0b <0f> 0b e9 ea f3 ff ff 44 89 e0 4c 8b 95 50 ff ff ff 83 c0 01 4c 8b RSP: 0018:ffff88808a40f5e0 EFLAGS: 00010083 RAX: dffffc0000000000 RBX: ffff8880908061e0 RCX: 0000000000000000 RDX: 1ffff11012100c3f RSI: 0000000000000000 RDI: ffff8880908061f8 RBP: ffff88808a40f6a8 R08: 1ffff11011481ec4 R09: ffffffff8a5c8a20 R10: ffffffff8a0afe30 R11: 0000000000000000 R12: ffffffff8a11dec0 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87fb8da0 __lock_acquire+0xf9/0x3fb0 kernel/locking/lockdep.c:3582 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4211 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:334 [inline] lock_sock_nested+0x41/0x120 net/core/sock.c:2912 lock_sock include/net/sock.h:1513 [inline] do_ipv6_setsockopt.isra.0+0x27e/0x49e0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xfc/0x170 net/ipv6/ipv6_sockglue.c:946 udpv6_setsockopt+0x68/0xb0 net/ipv6/udp.c:1570 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3120 __sys_setsockopt+0x180/0x280 net/socket.c:2046 __do_sys_setsockopt net/socket.c:2057 [inline] __se_sys_setsockopt net/socket.c:2054 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2054 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 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:00007fe15476fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458c29 RDX: 0000000000000023 RSI: 0000000000000029 RDI: 0000000000000006 RBP: 000000000073bfa0 R08: 00000000000000e8 R09: 0000000000000000 R10: 00000000200001c0 R11: 0000000000000246 R12: 00007fe1547706d4 R13: 00000000004cd398 R14: 00000000004db3f8 R15: 00000000ffffffff 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.