INFO: task syz-executor.2:16785 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:28000 pid:16785 ppid:  6665 flags:0x20000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6253
 schedule+0xd2/0x260 kernel/sched/core.c:6326
 blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
 loop_set_status+0x440/0x930 drivers/block/loop.c:1264
 loop_set_status_compat+0xac/0x100 drivers/block/loop.c:1674
 lo_compat_ioctl+0xeb/0x110 drivers/block/loop.c:1700
 compat_blkdev_ioctl+0x3b8/0x810 block/ioctl.c:674
 __do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ef3549
RSP: 002b:00000000f44ab5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000004c02
RDX: 00000000200000c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by kworker/u4:0/8:
1 lock held by khungtaskd/27:
 #0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2969:
 #0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
2 locks held by systemd-udevd/2976:
 #0: ffff88801a5f1118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
 #1: ffff88801a4c4b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by in:imklog/6231:
 #0: ffff88801e32d270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by agetty/6236:
 #0: ffff8880121e7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
 #1: ffffc900020782e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.2/16785:
 #0: ffff88801a4c4b60 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248

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

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xc1d/0xf50 kernel/hung_task.c:295
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12732 Comm: kworker/u4:7 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy14 ieee80211_iface_work
RIP: 0010:error_entry+0xc/0xc0 arch/x86/entry/entry_64.S:972
Code: f3 48 0f ae db e9 cd fe ff ff 85 db 0f 85 c5 fe ff ff 0f 01 f8 e9 bd fe ff ff 0f 1f 40 00 fc 56 48 8b 74 24 08 48 89 7c 24 08 <52> 51 50 41 50 41 51 41 52 41 53 53 55 41 54 41 55 41 56 41 57 56
RSP: 0018:ffffc90018b377a0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000a20 RCX: 0000000000000000
RDX: 1ffffffff1799ee0 RSI: ffffffff89600a39 RDI: ffff888029154f44
RBP: ffff888010c41640 R08: 0000000095672c66 R09: 0000000051c7f5eb
R10: fffff52003166ea9 R11: 000000000008808a R12: 0000000000000a20
R13: 0000000000000000 R14: 0000000000000028 R15: ffffffff889ed8fd
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe8cd905000 CR3: 00000000195fe000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 </TASK>
----------------
Code disassembly (best guess):
   0:	f3 48 0f ae db       	wrgsbase %rbx
   5:	e9 cd fe ff ff       	jmpq   0xfffffed7
   a:	85 db                	test   %ebx,%ebx
   c:	0f 85 c5 fe ff ff    	jne    0xfffffed7
  12:	0f 01 f8             	swapgs
  15:	e9 bd fe ff ff       	jmpq   0xfffffed7
  1a:	0f 1f 40 00          	nopl   0x0(%rax)
  1e:	fc                   	cld
  1f:	56                   	push   %rsi
  20:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  25:	48 89 7c 24 08       	mov    %rdi,0x8(%rsp)
* 2a:	52                   	push   %rdx <-- trapping instruction
  2b:	51                   	push   %rcx
  2c:	50                   	push   %rax
  2d:	41 50                	push   %r8
  2f:	41 51                	push   %r9
  31:	41 52                	push   %r10
  33:	41 53                	push   %r11
  35:	53                   	push   %rbx
  36:	55                   	push   %rbp
  37:	41 54                	push   %r12
  39:	41 55                	push   %r13
  3b:	41 56                	push   %r14
  3d:	41 57                	push   %r15
  3f:	56                   	push   %rsi