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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 67037C6778F for ; Mon, 9 Jul 2018 13:25:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1688820881 for ; Mon, 9 Jul 2018 13:25:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1688820881 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 S1754551AbeGINZE (ORCPT ); Mon, 9 Jul 2018 09:25:04 -0400 Received: from mail-it0-f71.google.com ([209.85.214.71]:51588 "EHLO mail-it0-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754518AbeGINZC (ORCPT ); Mon, 9 Jul 2018 09:25:02 -0400 Received: by mail-it0-f71.google.com with SMTP id b83-v6so9619080itg.1 for ; Mon, 09 Jul 2018 06:25:02 -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=lkTkpRdjtdXYwx4IGy/tl96gL3xvnJLIhmegWYNXa7k=; b=X6T68w79PsiDfyiuME8xxJTDJ7jhLDCGagWWtTo1GYfBSBDq4qg1jDLxpYzo+gbcE5 3jB75lAcF47DQet/6D1fdVtrBEnTgrP5qGfaFDR11OHn43R3oK7AsGM8EubFl0K0rIPI hiIUVPYuhZdaHsSbu0y1eovIhvfVDoypPVh6LzDU7H8nPncbaN9nHFQ+OuRj5UDIHcTN oH20fYCIMvFYvlOx0kcV+IMyTNDTRCwC6p2JqONY39Mu6RluqQw7ZDB1IRyOqjdjvi7/ PQ9PWaPyges7K60AzcIAHqhOU1a3sGmqnmu3Ko7J8URcIVUKJ4rVKKSHQt4nZwuykzIM Qh8w== X-Gm-Message-State: AOUpUlFgFmLQCAC1gncaPl5aQnsXiHDTgp3cDJ4MrlmSg/IFijkq/S4N BXmvMXD0UR2REZyukEU+NrQ9mkgpZ7JR6UgavyrbigPag0gV X-Google-Smtp-Source: AAOMgpfnNnluGE+m2duF8X6azNlx0x6TQ/UbCYxa/mGrqp3rgFrTlSH38HwVTlfG8IUYw1gvBmNw850H1y5HYZz8O4FdHuQxepY9 MIME-Version: 1.0 X-Received: by 2002:a6b:5015:: with SMTP id e21-v6mr9235959iob.67.1531142702324; Mon, 09 Jul 2018 06:25:02 -0700 (PDT) Date: Mon, 09 Jul 2018 06:25:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000df6781057090f03d@google.com> Subject: INFO: task hung in vfs_setxattr From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk 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: d00d6d9a339d Add linux-next specific files for 20180709 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1414611c400000 kernel config: https://syzkaller.appspot.com/x/.config?x=94fe2b586beccacd dashboard link: https://syzkaller.appspot.com/bug?extid=6cd4d2845f652967921c 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+6cd4d2845f652967921c@syzkaller.appspotmail.com FAT-fs (loop6): Unrecognized mount option "uid=" or missing value INFO: task syz-executor3:28571 blocked for more than 140 seconds. Not tainted 4.18.0-rc3-next-20180709+ #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D25408 28571 4477 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xaa/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:748 [inline] vfs_setxattr+0x96/0x100 fs/xattr.c:218 setxattr+0x2ea/0x450 fs/xattr.c:450 path_setxattr+0x1e3/0x230 fs/xattr.c:469 __do_sys_setxattr fs/xattr.c:484 [inline] __se_sys_setxattr fs/xattr.c:480 [inline] __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:480 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455e29 Code: Bad RIP value. RSP: 002b:00007f1c60d88c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007f1c60d896d4 RCX: 0000000000455e29 RDX: 0000000020000400 RSI: 0000000020000380 RDI: 0000000020000140 RBP: 000000000072bff0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bbff8 R14: 00000000004d3370 R15: 0000000000000002 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 897 Comm: khungtaskd Not tainted 4.18.0-rc3-next-20180709+ #2 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+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.5+0x19/0xce lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:143 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x10b0 kernel/hung_task.c:265 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2419 Comm: udevd Not tainted 4.18.0-rc3-next-20180709+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x4043d1 Code: d5 b0 00 00 bf a0 54 62 00 e8 9b fb 00 00 bf b0 54 62 00 e8 91 fb 00 00 44 89 7c 24 64 4c 89 6c 24 50 49 89 df 44 89 74 24 58 <80> 3d b0 11 22 00 00 0f 84 88 07 00 00 83 7c 24 58 00 78 1e 8b 54 RSP: 002b:00007ffee90bf370 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00007ffee90bf46c RDX: 0000000000000004 RSI: 0000000000000001 RDI: 00000000006254a0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000004 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000891520 R15: 0000000000883250 FS: 00007f96fedce7a0(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001ca6fa000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 --- This bug is generated by a bot. 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