INFO: task syz-executor.1:27360 blocked for more than 143 seconds.
Not tainted 6.1.74-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D
stack:21192 pid:27360 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
wb_wait_for_completion+0x162/0x290 fs/fs-writeback.c:191
sync_inodes_sb+0x28f/0xb10 fs/fs-writeback.c:2739
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:87
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f82bd67e0d7
RSP: 002b:00007ffc1e825008 EFLAGS: 00000246
ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f82bd67e0d7
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc1e8250c0
RBP: 00007ffc1e8250c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc1e826180
R13: 00007f82bd6c83b9 R14: 0000000000268a4b R15: 0000000000000003
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0:
ffffffff8d12a490
(
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:
ffffffff8d12ac90
(
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: ffffffff8d12a2c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
#0: ffffffff8d12a2c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d12a2c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by getty/3306:
#0:
ffff88807eb98098
(
&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
4 locks held by kworker/u4:13/5057:
#0: ffff8881432be938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc90003a3fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff88807e66a650 (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x263/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4521
#3: ffff88806f702f98 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_bmapi_convert_delalloc+0x291/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4526
5 locks held by kworker/1:18/32569:
2 locks held by syz-executor.1/27360:
#0: ffff88807e66a0e0 (&type->s_umount_key#78){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1: ffff888143f387d0 (
&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x270/0xb10 fs/fs-writeback.c:2737
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.74-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11290 Comm: kworker/0:16 Not tainted 6.1.74-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: xfs-buf/loop1 xfs_buf_ioend_work
RIP: 0010:lookup_object lib/debugobjects.c:195 [inline]
RIP: 0010:debug_object_deactivate+0xa4/0x420 lib/debugobjects.c:774
Code: a5 fd 4c 89 34 24 48 8b 1b 45 31 f6 eb 06 48 8b 1b 41 ff c6 48 85 db 74 3c 4c 8d 7b 18 4d 89 fd 49 c1 ed 03 43 80 7c 25 00 00 <74> 08 4c 89 ff e8 02 72 a5 fd 49 39 2f 0f 84 91 00 00 00 48 89 d8
RSP: 0018:ffffc90000007be8 EFLAGS: 00000046
RAX: 1ffffffff23f0d6f RBX: ffff8880741b7b28 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90000007ac0
RBP: ffff888018f8f1a0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff1100e836f68 R14: 0000000000000000 R15: ffff8880741b7b40
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f5aa4ec600 CR3: 000000007eb1c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
debug_deactivate+0x1d/0x280 kernel/time/hrtimer.c:481
__run_hrtimer kernel/time/hrtimer.c:1653 [inline]
__hrtimer_run_queues+0x334/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x196/0x2c0 kernel/time/hrtimer.c:1766
__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:653
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 fc 97 1c 00 44 8b 24 24 4d 85 ff 75 07 e8 ee 97 1c 00 eb 06 e8 e7 97 1c 00 fb 48 c7 c7 c0 64 00 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 41 56 e8 f6
RSP: 0018:ffffc90004df7800 EFLAGS: 00000293
RAX: ffffffff816ddad9 RBX: 0000000000000000 RCX: ffff888020ef8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d0064c0
RBP: ffffc90004df78f0 R08: ffffffff816ddab6 R09: fffffbfff2092275
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000005f
R13: dffffc0000000000 R14: ffffffff816dd920 R15: 0000000000000200
_printk+0xd1/0x111 kernel/printk/printk.c:2293
__xfs_printk fs/xfs/xfs_message.c:24 [inline]
_xfs_alert_tag+0x1d0/0x2f0 fs/xfs/xfs_message.c:74
xfs_buf_verifier_error+0x14e/0x2a0 fs/xfs/xfs_error.c:417
xfs_agf_read_verify+0x1f8/0x2a0 fs/xfs/libxfs/xfs_alloc.c:3008
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