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 1D8FEC04AB4 for ; Thu, 16 May 2019 05:46:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE9E620848 for ; Thu, 16 May 2019 05:46:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726593AbfEPFqL (ORCPT ); Thu, 16 May 2019 01:46:11 -0400 Received: from mail-it1-f198.google.com ([209.85.166.198]:54284 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726347AbfEPFqG (ORCPT ); Thu, 16 May 2019 01:46:06 -0400 Received: by mail-it1-f198.google.com with SMTP id k8so2250405itd.4 for ; Wed, 15 May 2019 22:46:06 -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=tgc7GEi/p8to8+1uRafrubdbYu2TMmvglM0eA+RoSWQ=; b=R7W/i4yw3aquX2I3RfgpvNXtnulpKvC8ioBHAalF6R0WfoMhguDkEUUxhFXPVYBDlr 3+TH3MCX+ZU8IyG5inaV7xlYBybtU38W+0504U1OtXTgqrfvAoC51xnqBphEKVYhUZ3T AeZEmshi6eqdz5E/Nxjj+AGfJf/Fi0f7eWu6PI7pND6NyFvGC5FfeOO9xur/Yv2q/1/b MhrL1Ad4vNssweR/w+NVAtLauKVMqX8u+DSkW9a3dyxMVTEQbGifjcMg0rZfvUVlH3Nx flP2D/9v/zDXzbaVIwBDCXTuQQiDhSLQWrx+pELs08HMuWFfI+HOFAAQxp9LXfc61jb/ 8Pxw== X-Gm-Message-State: APjAAAVbuadbeQ7isJGv0J9xOGRXH91wj8aHb0enVXD4G16gbqUROoxD sp3K3SBLS6hrscevLlYWh8wicHjroGp32ROnX3E/TejpXTOQ X-Google-Smtp-Source: APXvYqxdnOLPNI4SPCg8kAAc4Imf3dgIaZgeX3CzvLXOlPKTDwXGEropBQJBQyY6HpcG8WVv6rtv/62aUZVwHw8wIyiroxq8mp2G MIME-Version: 1.0 X-Received: by 2002:a24:9906:: with SMTP id a6mr10464843ite.52.1557985565578; 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: <00000000000033a0120588fac894@google.com> Subject: 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: 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: 35c99ffa Merge tag 'for_linus' of git://git.kernel.org/pub.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=10e970f4a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=82f0809e8f0a8c87 dashboard link: https://syzkaller.appspot.com/bug?extid=94cc2a66fc228b23f360 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+94cc2a66fc228b23f360@syzkaller.appspotmail.com WARNING: CPU: 1 PID: 32543 at kernel/locking/lockdep.c:734 arch_local_save_flags arch/x86/include/asm/paravirt.h:762 [inline] WARNING: CPU: 1 PID: 32543 at kernel/locking/lockdep.c:734 arch_local_save_flags arch/x86/include/asm/paravirt.h:760 [inline] WARNING: CPU: 1 PID: 32543 at kernel/locking/lockdep.c:734 look_up_lock_class kernel/locking/lockdep.c:725 [inline] WARNING: CPU: 1 PID: 32543 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: 32543 Comm: syz-executor.4 Not tainted 5.1.0+ #9 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:180 [inline] fixup_bug arch/x86/kernel/traps.c:175 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:273 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:292 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:ffff88806395f9e8 EFLAGS: 00010083 RAX: dffffc0000000000 RBX: ffff8880a947f1e0 RCX: 0000000000000000 RDX: 1ffff1101528fe3f RSI: 0000000000000000 RDI: ffff8880a947f1f8 RBP: ffff88806395fab0 R08: 1ffff1100c72bf45 R09: ffffffff8a459c80 R10: ffffffff8a0e47e0 R11: 0000000000000000 R12: ffffffff8a1235a0 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87fe4c60 __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+0x252/0x2e0 net/ipv4/af_inet.c:573 __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+0x103/0x680 arch/x86/entry/common.c:301 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:00007f695f8b6c78 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: 00007f695f8b76d4 R13: 00000000004bf1fe R14: 00000000004d04f8 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.