INFO: task syz-executor.3:20595 blocked for more than 143 seconds.
Not tainted 6.1.56-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D
stack:21736 pid:20595 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
wb_wait_for_completion+0x162/0x290 fs/fs-writeback.c:191
sync_inodes_sb+0x28f/0xb10 fs/fs-writeback.c:2717
sync_filesystem+0x16b/0x220 fs/sync.c:64
generic_shutdown_super+0x6b/0x340 fs/super.c:474
kill_block_super+0x7a/0xe0 fs/super.c:1459
deactivate_locked_super+0xa0/0x110 fs/super.c:332
cleanup_mnt+0x490/0x520 fs/namespace.c:1186
task_work_run+0x246/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/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+0x60/0x270 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff34ce7de17
RSP: 002b:00007ffeec865078 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff34ce7de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffeec865130
RBP: 00007ffeec865130 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeec8661f0
R13: 00007ff34cec73b9 R14: 00000000001f6e8e R15: 0000000000000004
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0:
ffffffff8d12a170
(
rcu_tasks.tasks_gp_mutex
){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d12a970 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8d129fa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
#0: ffffffff8d129fa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d129fa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6493
2 locks held by getty/3305:
#0: ffff88814b882098
(&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1:
ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
2 locks held by kworker/0:31/11296:
2 locks held by kworker/u4:7/18264:
#0: ffff8880b9839e18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffff8880b9827788 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x43d/0x770 kernel/sched/psi.c:1000
4 locks held by kworker/u4:11/18318:
#0: ffff888014af6938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc9001494fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff88802840c650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x263/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4521
#3: ffff8880862cbf18 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_bmapi_convert_delalloc+0x291/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4526
2 locks held by syz-executor.3/20595:
#0: ffff88802840c0e0 (&type->s_umount_key#49){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1: ffff888143b487d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
#1: ffff888143b487d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x270/0xb10 fs/fs-writeback.c:2715
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.56-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6248 Comm: kworker/1:4 Not tainted 6.1.56-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: xfs-buf/loop3 xfs_buf_ioend_work
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5402 [inline]
RIP: 0010:lock_is_held_type+0x99/0x180 kernel/locking/lockdep.c:5704
Code: eb 8a e8 9a 16 00 00 65 ff 05 83 6d 79 75 41 83 bd d8 0a 00 00 00 7e 47 4c 89 ed 48 81 c5 e0 0a 00 00 31 db 48 83 fb 31 73 24 <48> 89 ef 4c 89 fe e8 1c 02 00 00 85 c0 75 2a 48 ff c3 49 63 85 d8
RSP: 0018:ffffc900001e0a88 EFLAGS: 00000087
RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000000101
RDX: ffff888028353b80 RSI: ffffffff8d129fa0 RDI: ffff8880283546b0
RBP: ffff8880283546d8 R08: ffffffff8159e3a0 R09: fffffbfff1fd4309
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000046
R13: ffff888028353b80 R14: 00000000ffffffff R15: ffffffff8d129fa0
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558072244a48 CR3: 000000000ce8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unbound_pwq_by_node+0x29/0x160 kernel/workqueue.c:582
__queue_work+0x363/0xf90 kernel/workqueue.c:1449
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1514 [inline]
__run_timers+0x6a8/0x890 kernel/time/timer.c:1790
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1919 [inline]
RIP: 0010:vprintk_emit+0x501/0x740 kernel/printk/printk.c:2267
Code: 21 e3 0f 85 a6 01 00 00 e8 0c a3 1c 00 44 8b 24 24 4d 85 ff 75 07 e8 fe a2 1c 00 eb 06 e8 f7 a2 1c 00 fb 48 c7 c7 40 61 00 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 41 56 e8 76
RSP: 0018:ffffc9000c2c7760 EFLAGS: 00000293
RAX: ffffffff816dcdf9 RBX: 0000000000000000 RCX: ffff888028353b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d006140
RBP: ffffc9000c2c7850 R08: ffffffff816dcdd6 R09: fffffbfff209306a
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000004b
R13: dffffc0000000000 R14: ffffffff816dcc40 R15: 0000000000000200
_printk+0xd1/0x111 kernel/printk/printk.c:2293
print_hex_dump+0x1a2/0x250 lib/hexdump.c:285
xfs_hex_dump+0x39/0x50 fs/xfs/xfs_message.c:110
xfs_buf_verifier_error+0x1ca/0x2a0 fs/xfs/xfs_error.c:428
xfs_agfl_read_verify+0x1e3/0x290 fs/xfs/libxfs/xfs_alloc.c:660
xfs_buf_ioend+0x28f/0x780 fs/xfs/xfs_buf.c:1303
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306