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Date: Tue, 11 Jan 2022 10:41:06 +0800 From: cruise k <cruise4k@...il.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, linux-kernel@...r.kernel.org Cc: sunhao.th@...il.com Subject: INFO: task hung in devtmpfs_submit_req Hi, Syzkaller found the following issue: HEAD commit: 75acfdb Linux 5.16-rc8 git tree: upstream console output: https://pastebin.com/raw/gwHBn2EB kernel config: https://pastebin.com/raw/XsnKfdRt And hope the report log can help you. INFO: task kworker/6:4:13959 blocked for more than 145 seconds. Not tainted 5.16.0-rc8+ #10 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/6:4 state:D stack:26944 pid:13959 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> __schedule+0xcd9/0x2550 schedule+0xd2/0x260 schedule_timeout+0x5e5/0x890 wait_for_completion+0x17b/0x280 devtmpfs_submit_req+0xa8/0x100 devtmpfs_delete_node+0xe1/0x150 device_del+0xadf/0xe80 usb_disconnect+0x4a4/0x8c0 hub_event+0x199c/0x4090 process_one_work+0x9df/0x16a0 worker_thread+0x90/0xe20 kthread+0x405/0x4f0 ret_from_fork+0x1f/0x30 </TASK>
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