INFO: task syz-executor.0:5047 blocked for more than 143 seconds.
Not tainted 6.5.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:19240 pid:5047 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6710
schedule+0xc3/0x180 kernel/sched/core.c:6786
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2143
do_wait_for_common+0x449/0x5f0 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x4a/0x60 kernel/sched/completion.c:138
__flush_work+0x130/0x1b0 kernel/workqueue.c:3389
nilfs_segctor_destroy fs/nilfs2/segment.c:2761 [inline]
nilfs_detach_log_writer+0x47d/0xbe0 fs/nilfs2/segment.c:2845
nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:498
generic_shutdown_super+0x134/0x340 fs/super.c:499
kill_block_super+0x68/0xa0 fs/super.c:1417
deactivate_locked_super+0xa4/0x110 fs/super.c:330
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f72ca27de17
RSP: 002b:00007ffc4f304178 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f72ca27de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc4f304230
RBP: 00007ffc4f304230 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc4f3052f0
R13: 00007f72ca2c73b9 R14: 0000000000208790 R15: 000000000000000b
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8d3295b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8d329970 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
3 locks held by kworker/1:1/26:
#0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2572
#1: ffffc90000a1fd00 ((work_completion)(&sci->sc_iput_work)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2574
#2: ffff88802335a600 (sb_internal#5){.+.+}-{0:0}, at: nilfs_evict_inode+0x167/0x500 fs/nilfs2/inode.c:929
1 lock held by khungtaskd/28:
#0: ffffffff8d3293e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4766:
#0: ffff88814a77b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2187
1 lock held by syz-executor.0/5047:
#0: ffff88802335a0e0 (&type->s_umount_key#65){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:360
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:389
ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4451 Comm: syslogd Not tainted 6.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:inode_needs_update_time fs/inode.c:2084 [inline]
RIP: 0010:file_update_time+0x2f0/0x3c0 fs/inode.c:2125
Code: 89 df e8 d3 c5 e8 ff 4c 8b 33 bb 00 00 80 00 be 00 00 80 00 4c 21 f6 31 ff e8 ec f7 8f ff 4c 21 f3 75 07 e8 a2 f3 8f ff eb 3a 9b f3 8f ff 49 81 c7 f8 01 00 00 4c 89 ff be 08 00 00 00 e8 57
RSP: 0018:ffffc90005acfb60 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000800000 RCX: ffff88804a1d5940
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000000000000000
RBP: ffffc90005acfc30 R08: ffffffff81fbc484 R09: 1ffffffff20f6874
R10: dffffc0000000000 R11: fffffbfff20f6875 R12: dffffc0000000000
R13: 0000000000000006 R14: 0000000070818000 R15: ffff888020dd0780
FS: 00007f410380d380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005575230e7600 CR3: 000000002ac29000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__generic_file_write_iter+0xa2/0x230 mm/filemap.c:3999
generic_file_write_iter+0xaf/0x310 mm/filemap.c:4044
call_write_iter include/linux/fs.h:1877 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x782/0xaf0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4103961bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc0288b088 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4103961bf2
RDX: 0000000000000086 RSI: 000055a19cc6dc50 RDI: 0000000000000003
RBP: 000055a19cc6dc50 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f4103b003a3 R11: 0000000000000246 R12: 0000000000000086
R13: 00007f410380d300 R14: 0000000000000004 R15: 000055a19cc6da60