INFO: task bch-reclaim/loo:17662 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:22696 pid:17662 tgid:17662 ppid:2      task_flags:0x200040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 bch2_journal_reclaim_thread+0x16b/0x4f0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24053 Comm: syz.7.6875 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__free_one_page+0x690/0xbd0
Code: 00 4d 89 e7 49 83 c7 34 4c 89 ff be 04 00 00 00 e8 d5 64 0d 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 0f 85 b9 03 00 00 41 83 3f 00 74 15 4c 89 e7 48 c7 c6 00 c0
RSP: 0018:ffffc90007b47720 EFLAGS: 00000807
RAX: 0000000000000000 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea00048ab534
RBP: 0000000000000002 R08: ffffea00048ab537 R09: 1ffffd40009156a6
R10: dffffc0000000000 R11: fffff940009156a7 R12: ffffea00048ab500
R13: 1ffffd40009156a0 R14: ffffea00048ab480 R15: ffffea00048ab534
FS:  00007f9fa27d56c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005572eaefbcb8 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 free_pcppages_bulk+0x2da/0x4e0
 free_frozen_page_commit+0x62c/0x1070
 __free_frozen_pages+0x67f/0xd30
 vfree+0x25a/0x400
 kcov_close+0x28/0x50
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9fa458ebe9
Code: Unable to access opcode bytes at 0x7f9fa458ebbf.
RSP: 002b:00007f9fa27d50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f9fa47b6098 RCX: 00007f9fa458ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9fa47b6098
RBP: 00007f9fa47b6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9fa47b6128 R14: 00007fff03e44500 R15: 00007fff03e445e8
 </TASK>
