INFO: task segctord:27666 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
segctord        D30088 27666      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
 rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:72
 nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2479 [inline]
 nilfs_segctor_thread+0x3c0/0xf50 fs/nilfs2/segment.c:2563
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Showing all locks held in the system:
4 locks held by kworker/u4:0/7:
1 lock held by khungtaskd/1570:
 #0: 00000000340aaf85 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by systemd-udevd/4700:
1 lock held by in:imklog/7790:
 #0: 00000000fa254e85 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
6 locks held by syz-executor.1/27668:
1 lock held by segctord/27666:
 #0: 00000000fd368f46 (&nilfs->ns_segctor_sem){++++}, at: nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362

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

NMI backtrace for cpu 0
CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x991/0xe60 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4694 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:hash_64_generic include/linux/hash.h:81 [inline]
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:2310 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2337 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:2391 [inline]
RIP: 0010:__lock_acquire+0xb98/0x3ff0 kernel/locking/lockdep.c:3416
Code: a7 06 0f 0b e9 12 f6 ff ff 66 41 f7 42 20 ff 1f 0f 84 a4 06 00 00 48 b9 eb 83 b5 80 46 86 c8 61 48 b8 00 00 00 00 00 fc ff df <49> 0f af cc 48 c1 e9 31 4c 8d 04 cd 40 75 d1 8c 4c 89 c2 48 c1 ea
RSP: 0018:ffff8880a0ef7be0 EFLAGS: 00000006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 61c8864680b583eb
RDX: 1ffff110141dd1d5 RSI: 000000001cdd95d6 RDI: 0000000000000000
RBP: ffff8880a0ee8eaa R08: 00000000fcd5cf55 R09: 0000000000000000
R10: ffff8880a0ee8e88 R11: 0000000000000000 R12: 335e4228dfce0cd4
R13: ffff8880a0ee8600 R14: ffff8880a0ee8ea0 R15: 0000000000000001
FS:  00007fb1291b78c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb125a36000 CR3: 00000000a168e000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:329 [inline]
 put_unused_fd+0x4b/0x70 fs/file.c:560
 do_sys_open+0x4f8/0x520 fs/open.c:1087
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fb128746840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffd72e78198 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffd72e784a0 RCX: 00007fb128746840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000558883a29540
RBP: 000000000000000d R08: 000000000000c0ff R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000558883a1c040 R14: 00007ffd72e78460 R15: 0000558883a29600