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=2.1 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SORTED_RECIPS,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 8C3BEC6778F for ; Mon, 9 Jul 2018 15:09:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B0242086A for ; Mon, 9 Jul 2018 15:09:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B0242086A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933370AbeGIPJF (ORCPT ); Mon, 9 Jul 2018 11:09:05 -0400 Received: from mail-io0-f199.google.com ([209.85.223.199]:41846 "EHLO mail-io0-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933335AbeGIPJC (ORCPT ); Mon, 9 Jul 2018 11:09:02 -0400 Received: by mail-io0-f199.google.com with SMTP id p12-v6so2479309iog.8 for ; Mon, 09 Jul 2018 08:09:02 -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=3rvXrhyLPnzJd+bo/hbvJEHHHMgYazfNpdNvs3mhiMU=; b=C8389HJSL6Vux+FyeML+y7a2RPWLO8/B7bfwEfVz1Q7wjnfklGaPjHWemE/A8owuh0 BmdckwgCDGpFvplL9qovOIy54MQbWkEXF1HMAJJ24gUd6Z3q7pVexsB7SqX+BeVQcd2A oh2VjAg1oRRHXlB1UA2EQq1ccTl13g5X6zxx0NWSEICE+CYibFThyqRcpembzwxw3yQU kJFyeWmCH+rqk6usJeef4Tttg1j/Y+KYEhMhB+UmoDNBYoS+pelfPomhGmPkvywqBWXU 8vFLMBzF/CM1eQ5xDa4tCMK3ECTCvcWdN9Zyj0gXT9ZvNhypVYO3y2eacEsagTxI9ClP 3vKw== X-Gm-Message-State: APt69E3LabB4hGhhOt0hg4OBthQ8O6wglABhCcgpi/vOPSzMxrjDtPBQ HKNk92Wz2yFBsq+8toBtyc0H+uIp41VBJWFdWOX+kOsre0FA X-Google-Smtp-Source: AAOMgpc+NNCo4OA4qQNqZesLiFOYyR5bl81JQDEHSL/rDIT8/mILZ+Qj99FG0lYgm6a9rKx+FtzKz8TGHFm7N/kv5q+XjHb6mZgO MIME-Version: 1.0 X-Received: by 2002:a02:3509:: with SMTP id k9-v6mr9426257jaa.35.1531148941799; Mon, 09 Jul 2018 08:09:01 -0700 (PDT) Date: Mon, 09 Jul 2018 08:09:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c63a4305709264a6@google.com> Subject: BUG: corrupted list in p9_fd_cancel From: syzbot To: davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, rminnich@sandia.gov, syzkaller-bugs@googlegroups.com, v9fs-developer@lists.sourceforge.net 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: 1e4b044d2251 Linux 4.18-rc4 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=156196a4400000 kernel config: https://syzkaller.appspot.com/x/.config?x=25856fac4e580aa7 dashboard link: https://syzkaller.appspot.com/bug?extid=735d926e9d1317c3310c compiler: gcc (GCC) 8.0.1 20180413 (experimental) userspace arch: i386 syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=12344f34400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1695badc400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+735d926e9d1317c3310c@syzkaller.appspotmail.com list_del corruption, ffff8801aa15b2a8->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:47! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 5039 Comm: syz-executor122 Not tainted 4.18.0-rc4+ #41 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 a0 65 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 60 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de RSP: 0018:ffff8801cfeef180 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff8801aa15b2a8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 RBP: ffff8801cfeef198 R08: ffff8801aac8e600 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 R13: dead000000000100 R14: ffff8801aa15b2a8 R15: ffff8801aa15b2b0 FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f7fe9b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000001d8066000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:117 [inline] list_del include/linux/list.h:125 [inline] p9_fd_cancel+0x104/0x360 net/9p/trans_fd.c:690 p9_client_rpc+0xf1f/0x1400 net/9p/client.c:800 p9_client_version net/9p/client.c:976 [inline] p9_client_create+0xd09/0x16c9 net/9p/client.c:1069 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2518 [inline] do_mount+0x581/0x30e0 fs/namespace.c:2848 __do_compat_sys_mount fs/compat.c:125 [inline] __se_compat_sys_mount fs/compat.c:92 [inline] __ia32_compat_sys_mount+0x5d5/0x860 fs/compat.c:92 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fedcb9 Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f7fe91ec EFLAGS: 00000286 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020002d00 RDX: 0000000020002d40 RSI: 0000000000200000 RDI: 0000000020002d80 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 240dd2352208d421 ]--- RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 a0 65 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 60 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de RSP: 0018:ffff8801cfeef180 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff8801aa15b2a8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 RBP: ffff8801cfeef198 R08: ffff8801aac8e600 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 R13: dead000000000100 R14: ffff8801aa15b2a8 R15: ffff8801aa15b2b0 FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f7fe9b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000001d8066000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches