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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE848C43334 for ; Wed, 22 Jun 2022 02:35:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355855AbiFVCf1 (ORCPT ); Tue, 21 Jun 2022 22:35:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355886AbiFVCfX (ORCPT ); Tue, 21 Jun 2022 22:35:23 -0400 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD952193E4 for ; Tue, 21 Jun 2022 19:35:21 -0700 (PDT) Received: by mail-io1-f71.google.com with SMTP id l130-20020a6b3e88000000b00669dcc36db3so8503617ioa.22 for ; Tue, 21 Jun 2022 19:35:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=qbckaV5ProAZ+VwaqK7h0vS9+jwuzfVt8tKSlPRCpHk=; b=aRB0yhUiUMTjPCCi8Tg2mITNBfjQgKmrsIvmc+2dmuV9JVEBbZfudYL2A8fMQJ3LQa doSDmbkLsVEhkDta6bHvoLdoUTDx91qtrWZxhtBcTngCi6w5hFYZ0DIWyHU1xW38HUUS Ytqui3l7jZwO3ZMRIRmn2b329Uxcb7jZnwm5rqewM1uDcYXWdONA1zwjdn9ESFj1lNHo lxfByWH8Bf77NX+BOApTlxAn0uGs02XZuux6OFN+gs1J8vyiePlHWhXiDewNM77mwMI+ XggbJ5/VAzRuD26tm6kenbJUQiUX4AuwRYgSRdyRx1QV90OkSocJFyQwkVxNkF31oFSR Qw3w== X-Gm-Message-State: AJIora/KiNmUYiy/2NyWYkUvltAs3fEd4osh+T1C0vCHFnRNWDiEg1Me WTWjhs7qFli65KH2glEwm4NjzSRkQ/r037gmjHHvLyvx+C/b X-Google-Smtp-Source: AGRyM1vVeqfFfunQOmNktWQ3BEBvlkqRjKQ95uSrB0UJSIz2/S+eS8X7h2EdSAvqKUiteAzQWHPMvauNK2rwZhZ66jHnYAO5NWwe MIME-Version: 1.0 X-Received: by 2002:a05:6638:3729:b0:332:1c7e:91f7 with SMTP id k41-20020a056638372900b003321c7e91f7mr800775jav.84.1655865321113; Tue, 21 Jun 2022 19:35:21 -0700 (PDT) Date: Tue, 21 Jun 2022 19:35:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000042d02d05e2003028@google.com> Subject: [syzbot] INFO: task hung in kernfs_dop_revalidate From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: f0ec9c65a8d6 Merge tag 'char-misc-5.19-rc3' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1012c290080000 kernel config: https://syzkaller.appspot.com/x/.config?x=70e1a4d352a3c6ae dashboard link: https://syzkaller.appspot.com/bug?extid=41424c58d8613bce38c0 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17cdda40080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+41424c58d8613bce38c0@syzkaller.appspotmail.com INFO: task udevd:2979 blocked for more than 147 seconds. Not tainted 5.19.0-rc2-syzkaller-00147-gf0ec9c65a8d6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:26640 pid: 2979 ppid: 1 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5116 [inline] __schedule+0xa00/0x4b30 kernel/sched/core.c:6428 schedule+0xd2/0x1f0 kernel/sched/core.c:6500 rwsem_down_read_slowpath+0x5b9/0xb00 kernel/locking/rwsem.c:1077 __down_read_common kernel/locking/rwsem.c:1242 [inline] __down_read kernel/locking/rwsem.c:1251 [inline] down_read+0xe2/0x440 kernel/locking/rwsem.c:1491 kernfs_dop_revalidate+0xec/0x600 fs/kernfs/dir.c:1098 d_revalidate fs/namei.c:848 [inline] d_revalidate fs/namei.c:845 [inline] lookup_fast+0x385/0x6d0 fs/namei.c:1662 walk_component+0xcf/0x6a0 fs/namei.c:2010 link_path_walk.part.0+0x7ef/0xf70 fs/namei.c:2341 link_path_walk fs/namei.c:2265 [inline] path_lookupat+0xc8/0x860 fs/namei.c:2492 filename_lookup+0x1c6/0x590 fs/namei.c:2522 user_path_at_empty+0x42/0x60 fs/namei.c:2895 do_readlinkat+0xcd/0x2f0 fs/stat.c:456 __do_sys_readlink fs/stat.c:489 [inline] __se_sys_readlink fs/stat.c:486 [inline] __x64_sys_readlink+0x74/0xb0 fs/stat.c:486 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7fb1d2b27277 RSP: 002b:00007ffda1230de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 00007ffda1230df8 RCX: 00007fb1d2b27277 RDX: 0000000000000400 RSI: 00007ffda1230df8 RDI: 00007ffda12312d8 RBP: 0000000000000400 R08: 00000000007fffff R09: 0000563248ae65a0 R10: 00007fb1d2bb4fc0 R11: 0000000000000246 R12: 00007ffda12312d8 R13: 00007ffda1231248 R14: 0000563248ad0910 R15: 0000000000000000 INFO: task syz-executor.3:3686 blocked for more than 156 seconds. Not tainted 5.19.0-rc2-syzkaller-00147-gf0ec9c65a8d6 #0 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches