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_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 4CD9FC06510 for ; Tue, 2 Jul 2019 16:17:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2BE1A206A3 for ; Tue, 2 Jul 2019 16:17:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726977AbfGBQRG (ORCPT ); Tue, 2 Jul 2019 12:17:06 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:43924 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725996AbfGBQRG (ORCPT ); Tue, 2 Jul 2019 12:17:06 -0400 Received: by mail-io1-f71.google.com with SMTP id y5so19351480ioj.10 for ; Tue, 02 Jul 2019 09:17:05 -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=Qmk524b00MU6ToPqGyWqdEyJ+Ug/dqtjf66MdS9xRbE=; b=URxiFMxbQZkS1LNmsXCq6rlgsfMUVT9hm1te0mo3vxbbAmX+Lcz54T7W9T4reGKhGu dhRxfCjjU3Fu3mqgJmyre+8OByM9kiZQXx3fodnpaDh8pI1bF+TkQ2wJDp+D7HePxdA3 k32OKJc/5oVxWsVNQDkiYwHk6ZXaIAl2a3Zb5atFYdxjRNweCGXNJ32gRV/AyIYSrZMS rrygG3Q1KLdfY15GemLI/Uh91IMNaJNa+7VHo3B/h04odtdNFN4PG0lZ9QP5VNaJnLoH P4ctdGBwVxNkrf/3sTPXiN6iSJLfUf1CII2KEh4fbA3VioLjJJc5/ZwzIJnKAGwhIs52 R82Q== X-Gm-Message-State: APjAAAV+FLgrtNmrfVTXQCCQvu0s3vPWPeEytskPGDK/dRQJspUdZL8Y iMfzDNAn6hqEVZgBZJzSTdaz6zFUVI4lBHJf2I7WmraPKrhu X-Google-Smtp-Source: APXvYqxm+NCBJzRexTyr89ra9l5S7Wa2AwoWb0Qqilvic84NY/mtTpUU6u1F/U3jFonumZb4Q8LmvfFzsrlUYTdROFO8//4Br0FB MIME-Version: 1.0 X-Received: by 2002:a02:ccdc:: with SMTP id k28mr34239336jaq.41.1562084225610; Tue, 02 Jul 2019 09:17:05 -0700 (PDT) Date: Tue, 02 Jul 2019 09:17:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000607bf4058cb5135c@google.com> Subject: WARNING: locking bug in do_ipv6_getsockopt 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: 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: 6fbc7275 Linux 5.2-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13fb8fe5a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=f6451f0da3d42d53 dashboard link: https://syzkaller.appspot.com/bug?extid=babfdd7368c72aac3875 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1460390ba00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+babfdd7368c72aac3875@syzkaller.appspotmail.com WARNING: CPU: 1 PID: 18374 at kernel/locking/lockdep.c:735 arch_local_save_flags arch/x86/include/asm/paravirt.h:762 [inline] WARNING: CPU: 1 PID: 18374 at kernel/locking/lockdep.c:735 arch_local_save_flags arch/x86/include/asm/paravirt.h:760 [inline] WARNING: CPU: 1 PID: 18374 at kernel/locking/lockdep.c:735 look_up_lock_class kernel/locking/lockdep.c:726 [inline] WARNING: CPU: 1 PID: 18374 at kernel/locking/lockdep.c:735 register_lock_class+0xe10/0x1860 kernel/locking/lockdep.c:1079 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 18374 Comm: syz-executor.0 Not tainted 5.2.0-rc7 #65 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:219 __warn.cold+0x20/0x4d kernel/panic.c:576 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:735 [inline] RIP: 0010:register_lock_class+0xe10/0x1860 kernel/locking/lockdep.c:1079 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:ffff88809ea3f678 EFLAGS: 00010087 RAX: dffffc0000000000 RBX: ffff888090b948e0 RCX: 0000000000000000 RDX: 1ffff1101217291f RSI: 0000000000000000 RDI: ffff888090b948f8 RBP: ffff88809ea3f740 R08: 1ffff11013d47ed7 R09: ffffffff8a65ad40 R10: ffffffff8a2e9180 R11: 0000000000000000 R12: ffffffff8a3243a0 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff88023e60 __lock_acquire+0x116/0x5490 kernel/locking/lockdep.c:3674 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4303 __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:2913 lock_sock include/net/sock.h:1522 [inline] do_ipv6_getsockopt.isra.0+0x289/0x2590 net/ipv6/ipv6_sockglue.c:1167 ipv6_getsockopt+0x186/0x280 net/ipv6/ipv6_sockglue.c:1391 udpv6_getsockopt+0x68/0xa0 net/ipv6/udp.c:1590 sock_common_getsockopt+0x94/0xd0 net/core/sock.c:3085 __sys_getsockopt+0x15f/0x240 net/socket.c:2109 __do_sys_getsockopt net/socket.c:2120 [inline] __se_sys_getsockopt net/socket.c:2117 [inline] __x64_sys_getsockopt+0xbe/0x150 net/socket.c:2117 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4597c9 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:00007fb5fd78ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004597c9 RDX: 0000000000000036 RSI: 0000000000000029 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000020000080 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb5fd78b6d4 R13: 00000000004c0803 R14: 00000000004d2b88 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches