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_HELO_NONE,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 5CD7FC04AAF for ; Tue, 21 May 2019 08:31:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9EC79216B7 for ; Tue, 21 May 2019 08:31:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726995AbfEUIbK (ORCPT ); Tue, 21 May 2019 04:31:10 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:52473 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726657AbfEUIbG (ORCPT ); Tue, 21 May 2019 04:31:06 -0400 Received: by mail-io1-f69.google.com with SMTP id n82so13552850iod.19 for ; Tue, 21 May 2019 01:31:05 -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:in-reply-to:message-id:subject :from:to; bh=wO+SNayuGRGORA/iNMIl13BvsLdE+BTs0PZ1vvmuPRk=; b=MH/mf5OT6PcrQwK07eD39j5JHpsT15wOR1YoZpNpe3wxxcYEl+dAvdn47Wag5Uh1cf xTckcGTRMsW5durrvWTC8Ql4HxJfQklU6q9DQ5a8ezWEqK2KHrFJOek7JPcfiAsWvWFP G0JIdtEx7bj2qNsdJfQdVKSU0ARqSkQHDmTDgEkhTEdT1WIkob4Yvdl6Y6aw3Xou/YQT ZZqtckyPQtO1VgNwlmFyxm36hpi3UVyssGCXbqK5MWHgysDL2kJmHvluuJo4xtP8zoPA p3oZY5tkqDSedic8SUhAnncICaMN+EvLmcepB57polMpW0axFg8mYcevA29zuq8V8qnv WFPw== X-Gm-Message-State: APjAAAUws3avfZxT6TwN/HMwvbnHXZM+gGXQOqvO2FPvM+zw5FjfKDU0 POHqacojEzTDqMu/4C1yEu1xbhkSl6pZnyzLKDiRAoDMFAwd X-Google-Smtp-Source: APXvYqxLNOmJWzS0OQ/JEpStyrsvuk+TfHKloJXRpkAqRBq3AeDbkB2ONuThOugJAqv1ke3lyt7HZEjcWvTZtjIyuSd4E5XRArVu MIME-Version: 1.0 X-Received: by 2002:a6b:da0f:: with SMTP id x15mr1036473iob.214.1558427465554; Tue, 21 May 2019 01:31:05 -0700 (PDT) Date: Tue, 21 May 2019 01:31:05 -0700 In-Reply-To: <00000000000033a0120588fac894@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007e2260058961abd9@google.com> Subject: Re: WARNING: locking bug in inet_autobind From: syzbot To: ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, kafai@fb.com, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.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 syzbot has found a reproducer for the following crash on: HEAD commit: f49aa1de Merge tag 'for-5.2-rc1-tag' of git://git.kernel.o.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=14e5b130a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=fc045131472947d7 dashboard link: https://syzkaller.appspot.com/bug?extid=94cc2a66fc228b23f360 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=163731f8a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+94cc2a66fc228b23f360@syzkaller.appspotmail.com WARNING: CPU: 1 PID: 28592 at kernel/locking/lockdep.c:734 arch_local_save_flags arch/x86/include/asm/paravirt.h:762 [inline] WARNING: CPU: 1 PID: 28592 at kernel/locking/lockdep.c:734 arch_local_save_flags arch/x86/include/asm/paravirt.h:760 [inline] WARNING: CPU: 1 PID: 28592 at kernel/locking/lockdep.c:734 look_up_lock_class kernel/locking/lockdep.c:725 [inline] WARNING: CPU: 1 PID: 28592 at kernel/locking/lockdep.c:734 register_lock_class+0xe10/0x1860 kernel/locking/lockdep.c:1078 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 28592 Comm: syz-executor.5 Not tainted 5.2.0-rc1+ #1 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/0x744 kernel/panic.c:218 __warn.cold+0x20/0x4d kernel/panic.c:575 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:986 RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:734 [inline] RIP: 0010:register_lock_class+0xe10/0x1860 kernel/locking/lockdep.c:1078 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:ffff888093d179e8 EFLAGS: 00010083 RAX: dffffc0000000000 RBX: ffff8880967cd160 RCX: 0000000000000000 RDX: 1ffff11012cf9a2f RSI: 0000000000000000 RDI: ffff8880967cd178 RBP: ffff888093d17ab0 R08: 1ffff110127a2f45 R09: ffffffff8a659d40 R10: ffffffff8a2e8440 R11: 0000000000000000 R12: ffffffff8a323030 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff88022ba0 __lock_acquire+0x116/0x5490 kernel/locking/lockdep.c:3673 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4302 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] lock_sock_nested+0x41/0x120 net/core/sock.c:2917 lock_sock include/net/sock.h:1525 [inline] inet_autobind+0x20/0x1a0 net/ipv4/af_inet.c:183 inet_dgram_connect+0x243/0x2d0 net/ipv4/af_inet.c:573 __sys_connect+0x264/0x330 net/socket.c:1840 __do_sys_connect net/socket.c:1851 [inline] __se_sys_connect net/socket.c:1848 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1848 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2321b1ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459279 RDX: 000000000000001c RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2321b1b6d4 R13: 00000000004bf74d R14: 00000000004d0c18 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..