INFO: task bch-reclaim/loo:12105 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:21968 pid:12105 tgid:12105 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: 15524 Comm: syz.5.1894 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:__get_pfnblock_flags_mask+0x1e5/0x240
Code: e7 38 41 c1 ee 09 41 83 e6 38 49 01 c6 49 83 c6 18 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 ce 03 0e 00 49 8b 06 <44> 89 f9 48 d3 e8 48 21 d8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90003cdf748 EFLAGS: 00000046
RAX: 0808080808080808 RBX: 0000000000000017 RCX: dffffc0000000000
RDX: 0000000000000017 RSI: 0000000000106428 RDI: ffffea0004190a00
RBP: 0000000000000f00 R08: ffffffff8fa38337 R09: 1ffffffff1f47066
R10: dffffc0000000000 R11: fffffbfff1f47067 R12: 0000000000000400
R13: dffffc0000000000 R14: ffff88813fffda10 R15: 0000000000000010
FS:  00007ff0173d56c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b98afe65c8 CR3: 0000000024a76000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 free_pcppages_bulk+0x19c/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: 0033:0x7ff01918e7eb
Code: Unable to access opcode bytes at 0x7ff01918e7c1.
RSP: 002b:00007ff0173d2f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000007 RCX: 00007ff01918e7eb
RDX: 00007ff0173d3fe0 RSI: 0000000080085502 RDI: 0000000000000007
RBP: 00007ff0173d3fe0 R08: 0000000000000080 R09: 00007ff0173d2fd8
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000008 R15: 00007ff01921d391
 </TASK>
