From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 BB32224DD1B for ; Thu, 10 Jul 2025 11:59:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752148745; cv=none; b=hohzJS6fSHlrY4dbCpKadWhYbB67opUp9sH6AZIdM4GMSssTtI2H0se8YGiyOdPkhS102/46E9KBG1lAUOaGKfmgIwHJcvizCfuXPadwlh9JB8qtD8f+nEPij2mit2YBn4+lP59glHsgRuzRFgCz9k20SZZkds4QVSilX30ICZ8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752148745; c=relaxed/simple; bh=CQ1RrZv80pg4xVgU+w2Fk6UnKG/bifaJSGmmpX0/PqM=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=RSqmEt4ZAzfk2N2veUzdev1/yYwOLz8UyVk1UnFowSHpL6a9IPtuU8EJEBVCBcm5PvSICHbi9e1A8/3uNUWo09H/2Airfc8ErcLHSjDNfbyCgWQ4Gu5+L7xrt/SlxnQAEvCx2jah0Hq7w2eyKczFKtiTgJcWHAh/ug8/1Lq8GLM= 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=209.85.166.71 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-io1-f71.google.com with SMTP id ca18e2360f4ac-86d01ff56ebso155918839f.1 for ; Thu, 10 Jul 2025 04:59:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752148743; x=1752753543; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=E+MtTEKN3uuEu/Pw/kFBjduqVFgqx6sd0+WtN/rGCco=; b=h7uS2ypWwB7fqWFMqJT2vRcIFktzEZLn06B90oEJSD/olHsWYe13/UzE24zanO7zTV 3+WXTHv6fU0J5Yifvub3rCtSlkip1Egv+jIf7jyB4VA3/mpy04/9rVrHVHyul9c1uSak TXVho6hyhMofPLbLLfYSc0rbkF/qYVDzvZYRpXR5fKrq3cXZHBvozI3CpgFmhm8htKjB OrPCvPoz7Qz2ya8onXZvd4Y4emMj97e9yywNdB2hsv3fGJk3nu3yqP7w0ae7ePP0mHmR KQ0OnQBrfYxQSUBNgoQUlIU27qEpEKzZhSa4mJCoM82tLh5nNMoNNMkjUDH5EhscDSpv o0Dg== X-Forwarded-Encrypted: i=1; AJvYcCWJVxKaW6B+dKm9t6ZcwrCgEOP8f40bvvfeQ2991yq8FOZSerRGjvTlHvrbiTicyNTYmBtgtkiRBWEpHRE=@vger.kernel.org X-Gm-Message-State: AOJu0YwjbxnM/XMQlmGTAMu4REVIi6GvnsYxepVDQsVnbGPCmciIa4Sx Eq8B3V1yFmwQuzA7wBbuqFsCirTlQHfEHbyL2Vi8OSMG5ifXoxt4O655uDvJ7QUsPLiueaJCnoG 36lNJdeV+fdniR1ezocauJFWvxsuUF8ZmkG8jTJ41VWaJDDhDqiRg1FLk4E0= X-Google-Smtp-Source: AGHT+IFO402OfJIPTmlN27dpNQyVhJeFFOiZUUde6AD306YTESVPTJBoAsA55ER0osAA45QfN5l34ipDw6kHl7qCkOr9W3zaF54B Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:15cc:b0:86a:93c:f5fb with SMTP id ca18e2360f4ac-87968f57664mr238219439f.1.1752148742833; Thu, 10 Jul 2025 04:59:02 -0700 (PDT) Date: Thu, 10 Jul 2025 04:59:02 -0700 In-Reply-To: <20250710110510.3162-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <686fab06.a00a0220.26a83e.0011.GAE@google.com> Subject: Re: [syzbot] [kernel?] INFO: task hung in uevent_show (2) From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: task hung in usbdev_ioctl INFO: task syz.1.17:6837 blocked for more than 143 seconds. Not tainted 6.16.0-rc4-syzkaller-00314-gb4b4dbfa96de-dirty #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.17 state:D stack:24088 pid:6837 tgid:6836 ppid:6635 task_flags:0x400040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x65d/0xc70 kernel/locking/mutex.c:747 device_lock include/linux/device.h:884 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2611 [inline] usbdev_ioctl+0x140/0x20c0 drivers/usb/core/devio.c:2827 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fddcf58d169 RSP: 002b:00007fddd03af038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fddcf7a5fa0 RCX: 00007fddcf58d169 RDX: 0000000000000000 RSI: 0000000041045508 RDI: 0000000000000003 RBP: 00007fddcf60e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fddcf7a5fa0 R15: 00007fff1a55f668 INFO: task syz.1.17:6837 is blocked on a mutex likely owned by task kworker/1:4:5945. task:kworker/1:4 state:S stack:22472 pid:5945 tgid:5945 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3d7/0x710 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_interruptible+0x1f/0x40 kernel/sched/completion.c:216 send_packet+0x63b/0xae0 drivers/media/rc/imon.c:649 imon_init_rdev drivers/media/rc/imon.c:1990 [inline] imon_init_intf0 drivers/media/rc/imon.c:2279 [inline] imon_probe+0x1f7e/0x3410 drivers/media/rc/imon.c:2436 usb_probe_interface+0x644/0xbc0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9a0 drivers/base/dd.c:657 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799 driver_probe_device+0x4f/0x430 drivers/base/dd.c:829 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1029 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3692 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9a0 drivers/base/dd.c:657 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799 driver_probe_device+0x4f/0x430 drivers/base/dd.c:829 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1029 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 Tested on: commit: b4b4dbfa media: stk1160: use usb_alloc_noncoherent/usb.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=170c9bd4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b49da22b2184ad70 dashboard link: https://syzkaller.appspot.com/bug?extid=592e2ab8775dbe0bf09a compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 patch: https://syzkaller.appspot.com/x/patch.diff?x=152f5a8c580000