INFO: task syz.5.259:7424 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.259       state:D stack:26024 pid:7424  tgid:7423  ppid:6628   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 wb_wait_for_completion+0x15f/0x260
 sync_inodes_sb+0x1bb/0xa10
 __iterate_supers+0x13d/0x290
 ksys_sync+0x94/0x150
 __ia32_sys_sync+0xe/0x20
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c5e38ebe9
RSP: 002b:00007f2c5f298038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f2c5e5b5fa0 RCX: 00007f2c5e38ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2c5e5b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c5e5b6038 R14: 00007f2c5e5b5fa0 R15: 00007ffdce8e5978
 </TASK>
INFO: task syz.5.259:7425 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.259       state:D stack:29064 pid:7425  tgid:7423  ppid:6628   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 sync_inodes_sb+0x19f/0xa10
 __iterate_supers+0x13d/0x290
 ksys_sync+0x94/0x150
 __ia32_sys_sync+0xe/0x20
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c5e38ebe9
RSP: 002b:00007f2c5f277038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f2c5e5b6090 RCX: 00007f2c5e38ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2c5e5b6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c5e5b6128 R14: 00007f2c5e5b6090 R15: 00007ffdce8e5978
 </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: 7244 Comm: bch-reclaim/loo 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:kasan_check_range+0x0/0x2c0
Code: 48 c7 c6 35 75 ba 8d e8 3e 00 05 ff 90 0f 0b cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 55 41 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ba
RSP: 0018:ffffc9000176e0b0 EFLAGS: 00000202
RAX: ffffc9000176e201 RBX: 0000000000000028 RCX: ffffffff84202860
RDX: 0000000000000001 RSI: 0000000000000028 RDI: ffffc9000176e1a0
RBP: ffffc9000176e388 R08: ffffc9000176e317 R09: 1ffff920002edc62
R10: dffffc0000000000 R11: fffff520002edc63 R12: ffffffff84202860
R13: 0000000000000000 R14: ffffc9000176e2f0 R15: ffffc9000176e1a0
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000268030 CR3: 0000000044f96000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __asan_memcpy+0x40/0x70
 __bch2_bkey_compat+0x4f0/0xbd0
 validate_bset_keys+0xb00/0x14a0
 validate_bset_for_write+0x117/0x220
 __bch2_btree_node_write+0x2ac5/0x41a0
 bch2_btree_node_write_trans+0x85/0x760
 btree_split+0x55d0/0x6df0
 bch2_btree_split_leaf+0x179/0x8e0
 bch2_trans_commit_error+0x1b7/0x1130
 __bch2_trans_commit+0x1bb5/0x8870
 bch2_btree_write_buffer_flush_locked+0x2708/0x4dd0
 btree_write_buffer_flush_seq+0x18c7/0x1a40
 bch2_btree_write_buffer_journal_flush+0x69/0xb0
 journal_flush_pins+0x8e3/0xe90
 __bch2_journal_reclaim+0x910/0xed0
 bch2_journal_reclaim_thread+0x177/0x4f0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
