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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 19D68C04AB4 for ; Thu, 16 May 2019 05:46:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF76820848 for ; Thu, 16 May 2019 05:46:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726542AbfEPFqG (ORCPT ); Thu, 16 May 2019 01:46:06 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:40612 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725975AbfEPFqG (ORCPT ); Thu, 16 May 2019 01:46:06 -0400 Received: by mail-io1-f69.google.com with SMTP id d24so1861471iob.7 for ; Wed, 15 May 2019 22:46:05 -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=ltOragm0SCqo4uoAEQQAlYmgIkzdvYfcpSv92gE1T/g=; b=rYZWu06psc9LX/2mQOJ2CEYttBerdpmvRuA2Dz1APKE2VgGrpLc7UY6DpISPM4ncbk E7BS+1M3qcO4AV3YxVHsAigMEd+pNsGJiTCQMiMyCzb8kKQyFdyGi3RgqRzx+YOUDtXu 6+caR/tU6Hz99ldBGB7PuEpGg6YgJEGUGHYntDd684Q2vl8oXONv4x7Er1T9a8cm+rQX yqF+wGfiRqokUUSg0JfExwf8tADhpObhglhkzNOlb4b5CAxyP1kj6ZdErdJ+e15Iv020 wNqMN1SGGfOgqQKHyx+Y/7QFUHfwoATaY5EBsLQ7Smy5eK1enSJgPRzV3JCI98FvxIpO Vb2Q== X-Gm-Message-State: APjAAAWFSVns68wCHGUWaxc3Ai1nX5Gyn6ZjAcJfiz2l6DBYUxoIThIj VeexqnYAa0Y1Qlww8lhg+VYXgFFsrw5BsdfGgHwjz6/EIAXl X-Google-Smtp-Source: APXvYqzwKn9sE6VTf7DFye3cDrVijXOpZDs3MSil5qUtRVtlHQRwdifCAK2mN67WThT25zT+9EoQ4V1ve+lq7vw/p+h74CYtN/wj MIME-Version: 1.0 X-Received: by 2002:a6b:ea02:: with SMTP id m2mr24613082ioc.270.1557985565350; Wed, 15 May 2019 22:46:05 -0700 (PDT) Date: Wed, 15 May 2019 22:46:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003028060588fac869@google.com> Subject: WARNING: locking bug in udpv6_pre_connect 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: 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: 8f779443 net: phy: realtek: fix double page ops in generic.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=13f16ee8a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=4005028a9d5ddac8 dashboard link: https://syzkaller.appspot.com/bug?extid=65f10c5aadc049eb5ef5 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+65f10c5aadc049eb5ef5@syzkaller.appspotmail.com WARNING: CPU: 0 PID: 2749 at kernel/locking/lockdep.c:734 arch_local_save_flags arch/x86/include/asm/paravirt.h:762 [inline] WARNING: CPU: 0 PID: 2749 at kernel/locking/lockdep.c:734 arch_local_save_flags arch/x86/include/asm/paravirt.h:760 [inline] WARNING: CPU: 0 PID: 2749 at kernel/locking/lockdep.c:734 look_up_lock_class kernel/locking/lockdep.c:725 [inline] WARNING: CPU: 0 PID: 2749 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: 0 PID: 2749 Comm: syz-executor.2 Not tainted 5.1.0+ #8 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:566 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:972 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:ffff8880475b79e8 EFLAGS: 00010083 RAX: dffffc0000000000 RBX: ffff888045e2f0a0 RCX: 0000000000000000 RDX: 1ffff11008bc5e17 RSI: 0000000000000000 RDI: ffff888045e2f0b8 RBP: ffff8880475b7ab0 R08: 1ffff11008eb6f45 R09: ffffffff8a455c80 R10: ffffffff8a0e2318 R11: 0000000000000000 R12: ffffffff8a11ed60 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87fe3860 __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] udpv6_pre_connect net/ipv6/udp.c:1064 [inline] udpv6_pre_connect+0xc4/0x170 net/ipv6/udp.c:1046 inet_dgram_connect+0x1cd/0x2e0 net/ipv4/af_inet.c:568 __sys_connect+0x266/0x330 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+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:00007f9ad544cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 000000000000001c RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9ad544d6d4 R13: 00000000004bf1fe R14: 00000000004d04b8 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.