INFO: task syz-executor712:6861 blocked for more than 143 seconds.
      Not tainted 5.9.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor712 state:D stack:25872 pid: 6861 ppid:  6855 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527
 schedule+0xd0/0x2a0 kernel/sched/core.c:4602
 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion_timeout+0x15e/0x270 kernel/sched/completion.c:157
 usb_start_wait_urb+0x144/0x2b0 drivers/usb/core/message.c:63
 usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:254
 do_proc_bulk+0x39b/0x710 drivers/usb/core/devio.c:1231
 proc_bulk_compat drivers/usb/core/devio.c:2052 [inline]
 usbdev_do_ioctl drivers/usb/core/devio.c:2603 [inline]
 usbdev_ioctl+0x924/0x3360 drivers/usb/core/devio.c:2708
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x445929
Code: Bad RIP value.
RSP: 002b:00007fff07425f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fff07425ff0 RCX: 0000000000445929
RDX: 0000000020000000 RSI: 00000000c0105502 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000401ec0 R09: 0000000000401ec0
R10: 0000000000401ec0 R11: 0000000000000246 R12: 0000000000403550
R13: 00000000004035e0 R14: 0000000000000000 R15: 0000000000000000

Showing all locks held in the system:
1 lock held by khungtaskd/1173:
 #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5825
2 locks held by in:imklog/6537:
 #0: ffff88809c7b1130 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930
 #1: ffff8880ae635e18 (&rq->lock){-.-.}-{2:2}, at: __need_fs_reclaim mm/page_alloc.c:4212 [inline]
 #1: ffff8880ae635e18 (&rq->lock){-.-.}-{2:2}, at: fs_reclaim_acquire+0xa1/0xf0 mm/page_alloc.c:4230

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0
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+0x18f/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd7d/0x1000 kernel/hung_task.c:295
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3899 Comm: systemd-journal Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0033:0x7fb2820220e5
Code: b1 00 00 00 4d 85 c9 0f 84 c8 00 00 00 4d 85 c0 0f 84 df 00 00 00 49 8d 2c 08 48 3b 6f 60 48 89 fb 77 42 8d 7e ff 48 8d 43 30 <83> ff 07 bf 00 00 00 00 0f 43 f7 48 83 ec 08 48 8b bb 48 01 00 00
RSP: 002b:00007ffc500e6ee0 EFLAGS: 00000287
RAX: 0000555a52bb5eb0 RBX: 0000555a52bb5e80 RCX: 000000000011b0f0
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 000000000011b148 R08: 0000000000000058 R09: 00007ffc500e6f20
R10: 000000000001300a R11: 00007fb27f6d2d10 R12: 0000000000000001
R13: 00007ffc500e6f98 R14: 0000000000000006 R15: 00007ffc500e6f20
FS:  00007fb2823338c0 GS:  0000000000000000