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 A4E15ECDFAA for ; Mon, 16 Jul 2018 05:59:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 619F120873 for ; Mon, 16 Jul 2018 05:59:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 619F120873 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 S1728202AbeGPGYq (ORCPT ); Mon, 16 Jul 2018 02:24:46 -0400 Received: from mail-it0-f70.google.com ([209.85.214.70]:60373 "EHLO mail-it0-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727182AbeGPGYq (ORCPT ); Mon, 16 Jul 2018 02:24:46 -0400 Received: by mail-it0-f70.google.com with SMTP id a10-v6so4019718itc.9 for ; Sun, 15 Jul 2018 22:59:03 -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=qQ6EahEjQPBk77jfxiCJPLwjXu1Hn1X1APuwfCkAbeM=; b=Gb6smTySOZ7CaH0RVGqDAjNqRj8kkCPcsltphcaFp6xMia14CUQrSCqoJtpSLnZ8Uy OsOnM1+qQ9VtvlmHZ3kBKZGE8bJOFo4hDPUfa23hhJHnycCQD5WhkmCfgSihYKCeYdn9 5EwI6fraB5Zh9EWAYN8cbKNGeMyPej1aDnd0zRo491V1w85Q5wzz/yCVr9sAeO2qSB1U 8AFwp3kAkYeYceOQzytCo8GkoEZoDU2k7FKFZeRelPuU/g8JOwMa7OZZ3FYYApH1v/se 6OkvBNZ4fn2FVd7o2Xd4FCpLd9AOk+y3BBo1Zs5XCornQRN3Yg4ebl9tiou99aS+e+gr 8FDg== X-Gm-Message-State: AOUpUlF43c3cqiKl84hcglE4GNksPNaaslcCgU8WuL7Q3BJRA/hbp613 4N2ZD0GLRU12Y1LduLGY3SGrxFYFMHMbpkD3FnEX76/PdGQF X-Google-Smtp-Source: AAOMgpd85W3kv3PHsLrT5yi+nzJJciFlCIP71eZEwJW8vbgrTe/AStNHOewfQ/nkYAgE57Ls30ySX5MzTcK4/DLxxd5FJXOjv0ee MIME-Version: 1.0 X-Received: by 2002:a02:3f2c:: with SMTP id d44-v6mr6952449jaa.60.1531720743147; Sun, 15 Jul 2018 22:59:03 -0700 (PDT) Date: Sun, 15 Jul 2018 22:59:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ca61cd0571178677@google.com> Subject: BUG: corrupted list in p9_read_work 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: 37b5dca2898d Merge tag 'rtc-4.18-2' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12b3e770400000 kernel config: https://syzkaller.appspot.com/x/.config?x=25856fac4e580aa7 dashboard link: https://syzkaller.appspot.com/bug?extid=2222c34dc40b515f30dc compiler: gcc (GCC) 8.0.1 20180413 (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+2222c34dc40b515f30dc@syzkaller.appspotmail.com list_del corruption, ffff8801931d8e28->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:47! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 27 Comm: kworker/0:2 Not tainted 4.18.0-rc4+ #148 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events p9_read_work 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 60 68 1a 88 e8 ba 69 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 00 68 1a 88 e8 a6 69 02 fe <0f> 0b 48 89 de 48 c7 c7 20 69 1a 88 e8 95 69 02 fe 0f 0b 48 89 de RSP: 0018:ffff8801d94575b0 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff8801931d8e28 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 RBP: ffff8801d94575c8 R08: ffff8801d9448700 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 R13: dead000000000100 R14: ffff8801931d8e00 R15: ffff8801996f7a10 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9e4e7e0000 CR3: 00000001aeeae000 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_read_work+0xa29/0x1060 net/9p/trans_fd.c:375 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 4e7d7b3b542c6c1e ]--- 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 60 68 1a 88 e8 ba 69 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 00 68 1a 88 e8 a6 69 02 fe <0f> 0b 48 89 de 48 c7 c7 20 69 1a 88 e8 95 69 02 fe 0f 0b 48 89 de RSP: 0018:ffff8801d94575b0 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff8801931d8e28 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 RBP: ffff8801d94575c8 R08: ffff8801d9448700 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 R13: dead000000000100 R14: ffff8801931d8e00 R15: ffff8801996f7a10 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9e4e7e0000 CR3: 00000001aeeae000 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.