From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A92E238BF64 for ; Mon, 2 Feb 2026 18:05:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770055531; cv=none; b=N2gDf0BZBSk0GEzKcMcVwB6NdfZEZndDyQ314+FCF7YfguhMOP8k81QwvG8PqHCo4kxUCN0lkAzb6/ygzdgDL1390KZwIlZ95YJ43w38oVaQZgYPnSQhBy5+eqPDPnYlZflSvGT2vfqquctShGoZVBoUKzp0N6fjceTOZRevad8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770055531; c=relaxed/simple; bh=pGX447dP/kFz8kz84koXOJ2/fnkIBeoenbCZ3+X4X9o=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=s0c0UxXZBmM0z+qs/Ysq2Sgo+ZwFb+l8fdajd1tlfXhrOyL4L1lyfdLZ2EHQJ0GWffP11zSpWPPs0FuAou6nl2j0Q05ltF2Po/b/zfOXSF6tF9ZKp2BQzj/jyltLyYzUgdgLjMnOr3qnJbQHyvTshCbIQT4+warWqRLupncIsrQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.205 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f205.google.com with SMTP id 5614622812f47-45c8d5caf62so9183739b6e.3 for ; Mon, 02 Feb 2026 10:05:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770055528; x=1770660328; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=OTr9+EynYv4FeyVlmNp2C92imZ52otdcDv9Jige4oVQ=; b=OQqyONZfouIPrZ9zl+7CK7XLeoVI4TcoTo3GfM3gitnf8bIaAxQD7im6SzP8WC147y W5B9hmVRd8fGoEOsl+ee5Vt4TEbEKNUGs9uvhYULmIjsIA/RZmyvEIgf7o59Y357jAx3 I6JRGUmzaYUgo99WtNgEcaXaj5jLjVChPSIn+i4ShCO39g9Ith/7yu7zTQlX2yctygQy dQkC9stsobcFoGfkJLdGjnE/Voe1538i+Dw+aIpyLBi1StOWIbWNGSsLTG3XV7HJGnKq x/N4GXFsWjBBlEqjh7asbgNdH3n6nus8hbirXzBfxI4BLtF/dYKT9YRBia2a81z1Y2Va Jdzg== X-Forwarded-Encrypted: i=1; AJvYcCXmUXpJWPMqi4sXYwRhZflRHCud0Xrw+T02BGo0RNGPNaj462rxOPfWehf0i+iX7FBCMwh8Wsqw9q9kD4gu@vger.kernel.org X-Gm-Message-State: AOJu0Yyc5041pLb/mv/HR/nJ7w41BgBtsfT+728qL9cGTPgvNNa56qk8 zefi+lf46ocd2xH//XpAoK31/aogLUvs9q3/nOGeLsJ8zdYKgUY5eqOwVzzLEfYNPVnEz1iNQeS YkRG0GCZfBbjwrlPOsY3WnljKKTEd1ZXehVshsvViBPd0wGfYq/cMwQg973c= Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4dfb:b0:662:f244:3530 with SMTP id 006d021491bc7-6630f004232mr5547317eaf.17.1770055528543; Mon, 02 Feb 2026 10:05:28 -0800 (PST) Date: Mon, 02 Feb 2026 10:05:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6980e768.050a0220.16b13.00a8.GAE@google.com> Subject: [syzbot] [hfs?] INFO: task hung in worker_thread (6) From: syzbot To: frank.li@vivo.com, glaubitz@physik.fu-berlin.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, slava@dubeyko.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 33a647c659ff Add linux-next specific files for 20260129 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15aa1644580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1b94612779ae7173 dashboard link: https://syzkaller.appspot.com/bug?extid=fa1cc3e4b001b79309ec compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16cc1c52580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17849588580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9d0ce0a8fecd/disk-33a647c6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4369620c4390/vmlinux-33a647c6.xz kernel image: https://storage.googleapis.com/syzbot-assets/18ae695e8dfc/bzImage-33a647c6.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/20bb3c39107f/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fa1cc3e4b001b79309ec@syzkaller.appspotmail.com INFO: task kworker/u8:5:78 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:5 state:D stack:23136 pid:78 tgid:78 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: writeback wb_workfn (flush-7:0) Call Trace: context_switch kernel/sched/core.c:5295 [inline] __schedule+0x1539/0x5080 kernel/sched/core.c:6907 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0xb46/0x1140 kernel/workqueue.c:3443 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 1 lock held by khungtaskd/30: #0: ffffffff8e7601a0 ( ){....}-{1:3} ffff8880206a0148 ( (wq_completion)writeback ){+.+.}-{0:0} , at: process_one_work+0x855/0x15a0 kernel/workqueue.c:3254 , at: super_trylock_shared+0x20/0xf0 fs/super.c:565 , at: hfsplus_find_init+0x168/0x2d0 fs/hfsplus/bfind.c:28 4 locks held by kworker/u8:3/49: #0: ffff8880206a0148 ( (wq_completion)writeback ){+.+.}-{0:0} , at: process_one_work+0x855/0x15a0 kernel/workqueue.c:3254 #1: ffffc90000ba7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x15a0 kernel/workqueue.c:3255 #2: ffff88802b4f00e0 (&type->s_umount_key#55){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 fs/super.c:565 #3: ffff88802b4f20b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 fs/hfsplus/bfind.c:28 4 locks held by kworker/u8:5/78: #0: ffff8880206a0148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x855/0x15a0 kernel/workqueue.c:3254 #1: ffffc900025cfc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x15a0 kernel/workqueue.c:3255 #2: ffff8880348a80e0 (&type->s_umount_key#55){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 fs/super.c:565 #3: ffff8880361ee0b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 fs/hfsplus/bfind.c:28 4 locks held by kworker/u8:6/1143: #0: ffff8880206a0148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x855/0x15a0 kernel/workqueue.c:3254 --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup