INFO: task syz-executor.4:17206 blocked for more than 143 seconds.
Not tainted 6.2.0-rc3-next-20230110-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28256 pid:17206 ppid:5119 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
handle_page_fault arch/x86/mm/fault.c:1519 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f681a8276c6
RSP: 002b:00007ffffde39a48 EFLAGS: 00010287
RAX: 0000001b32e22000 RBX: 00007f681a9ac018 RCX: 0000001b32e20000
RDX: 0000001b32e22004 RSI: 0000001b32e21764 RDI: 00000000cc60fa0e
RBP: 00000000cc60fa0e R08: 0000001b33220000 R09: 00000000cc60fa12
R10: 00007ffffdf91090 R11: 000000000002d8a0 R12: 00007f681a9a0000
R13: 0000000000000001 R14: 00000000000037d6 R15: ffffffff8165f71f
Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I stack:29040 pid:12 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c793470 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:rcu_tasks_trace state:I stack:29208 pid:13 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c793170 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:getty state:S stack:23336 pid:4750 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
wait_woken+0x197/0x200 kernel/sched/wait.c:463
n_tty_read+0x1055/0x13e0 drivers/tty/n_tty.c:2243
iterate_tty_read drivers/tty/tty_io.c:852 [inline]
tty_read+0x30e/0x5a0 drivers/tty/tty_io.c:927
call_read_iter include/linux/fs.h:1846 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x681/0x930 fs/read_write.c:470
ksys_read+0x12b/0x250 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6e7d1528fe
RSP: 002b:00007ffc09132ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055f6c775d910 RCX: 00007f6e7d1528fe
RDX: 0000000000000001 RSI: 00007ffc09132ae0 RDI: 0000000000000000
RBP: 000055f6c775d970 R08: 0000000000000007 R09: 000055f6c775ecd0
R10: 0000000000000063 R11: 0000000000000246 R12: 000055f6c775d9ac
R13: 00007ffc09132ae0 R14: 0000000000000000 R15: 000055f6c775d9ac
2 locks held by getty/4750:
#0: ffff88802be43098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
task:kworker/0:4 state:D
stack:23720 pid:5176 ppid:2 flags:0x00004000
Workqueue: rcu_gp wait_rcu_exp_gp
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
schedule_timeout+0x14e/0x2a0 kernel/time/timer.c:2167
synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:572 [inline]
synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:624 [inline]
rcu_exp_wait_wake+0x2ab/0x1220 kernel/rcu/tree_exp.h:693
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
2 locks held by kworker/0:4/5176:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
#1: ffffc90003f7fda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
task:kworker/1:7 state:D
stack:25016 pid:5184 ppid:2 flags:0x00004000
Workqueue: events pwq_unbound_release_workfn
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
exp_funnel_lock kernel/rcu/tree_exp.h:316 [inline]
synchronize_rcu_expedited+0x706/0x770 kernel/rcu/tree_exp.h:992
synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3482
lockdep_unregister_key+0x282/0x460 kernel/locking/lockdep.c:6362
wq_unregister_lockdep kernel/workqueue.c:3501 [inline]
pwq_unbound_release_workfn+0x258/0x340 kernel/workqueue.c:3739
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
2 locks held by kworker/1:7/5184:
#0:
ffff888012470d38
(
(wq_completion)events){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
, at: set_work_data kernel/workqueue.c:636 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
#1: ffffc900040ffda8
(
(work_completion)(&pwq->unbound_release_work)
){+.+.}-{0:0}
, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
task:kworker/0:14 state:D
stack:28304 pid:9355 ppid:2 flags:0x00004000
Workqueue: events pwq_unbound_release_workfn
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
synchronize_rcu_expedited+0x5e2/0x770 kernel/rcu/tree_exp.h:1007
synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3482
lockdep_unregister_key+0x282/0x460 kernel/locking/lockdep.c:6362
wq_unregister_lockdep kernel/workqueue.c:3501 [inline]
pwq_unbound_release_workfn+0x258/0x340 kernel/workqueue.c:3739
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
3 locks held by kworker/0:14/9355:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
#1: ffffc9000354fda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
#2: ffffffff8c79f138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#2: ffffffff8c79f138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x658/0x770 kernel/rcu/tree_exp.h:992
task:syz-executor.4 state:D
stack:28256 pid:17206 ppid:5119 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
handle_page_fault arch/x86/mm/fault.c:1519 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f681a8276c6
RSP: 002b:00007ffffde39a48 EFLAGS: 00010287
RAX: 0000001b32e22000 RBX: 00007f681a9ac018 RCX: 0000001b32e20000
RDX: 0000001b32e22004 RSI: 0000001b32e21764 RDI: 00000000cc60fa0e
RBP: 00000000cc60fa0e R08: 0000001b33220000 R09: 00000000cc60fa12
R10: 00007ffffdf91090 R11: 000000000002d8a0 R12: 00007f681a9a0000
R13: 0000000000000001 R14: 00000000000037d6 R15: ffffffff8165f71f
1 lock held by syz-executor.4/17206:
#0: ffff88807decae98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88807decae98 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.4 state:R running task stack:27224 pid:17208 ppid:5119 flags:0x00004006
Call Trace:
4 locks held by syz-executor.4/17208:
task:syz-executor.4 state:D stack:24016 pid:17284 ppid:17283 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1b0 kernel/sched/core.c:6695
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6754
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
synchronize_rcu_expedited+0x400/0x770 kernel/rcu/tree_exp.h:992
synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3482
lockdep_unregister_key+0x282/0x460 kernel/locking/lockdep.c:6362
wq_unregister_lockdep kernel/workqueue.c:3501 [inline]
destroy_workqueue+0x689/0x810 kernel/workqueue.c:4473
xlog_dealloc_log+0x196/0x210 fs/xfs/xfs_log.c:2159
xfs_unmountfs+0x151/0x290 fs/xfs/xfs_mount.c:1096
xfs_fs_put_super+0x7b/0x3b0 fs/xfs/xfs_super.c:1115
generic_shutdown_super+0x158/0x410 fs/super.c:492
kill_block_super+0x9b/0xf0 fs/super.c:1386
deactivate_locked_super+0x98/0x160 fs/super.c:332
deactivate_super+0xb1/0xd0 fs/super.c:363
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcbc368d537
RSP: 002b:00007fff41809098 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fcbc368d537
RDX: 00007fff4180916a RSI: 000000000000000a RDI: 00007fff41809160
RBP: 00007fff41809160 R08: 00000000ffffffff R09: 00007fff41808f30
R10: 000055555735b8b3 R11: 0000000000000246 R12: 00007fcbc36e6b24
R13: 00007fff4180a220 R14: 000055555735b810 R15: 00007fff4180a260
2 locks held by syz-executor.4/17284:
#0: ffff88802c1e20e0 (&type->s_umount_key#67){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:362
#1: ffffffff8c79f138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#1: ffffffff8c79f138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x400/0x770 kernel/rcu/tree_exp.h:992
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc3-next-20230110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x32f/0x3c0 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+0xcae/0x1050 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5176 Comm: kworker/0:4 Not tainted 6.2.0-rc3-next-20230110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:121 [inline]
RIP: 0010:rcu_is_watching+0x3f/0xb0 kernel/rcu/tree.c:695
Code: a8 6c 03 00 83 f8 07 89 c5 77 7a 48 8d 3c ed 00 e9 13 8c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 <48> 03 1c ed 00 e9 13 8c 48 b8 00 00 00 00 00 fc ff df 48 89 da 48
RSP: 0018:ffffc90003f7fbd0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000036ca8 RCX: ffffffff81641969
RDX: 1ffffffff1827d20 RSI: 0000000000000003 RDI: ffffffff8c13e900
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8e73ca97
R10: fffffbfff1ce7952 R11: 0000000000000000 R12: 0000000000000001
R13: 00000100ec330f58 R14: 0000000000000000 R15: 00000000000012d5
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a5f434e530 CR3: 0000000038ced000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x20/0x70 kernel/rcu/update.c:123
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x5ef/0x810 kernel/locking/lockdep.c:5680
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:390 [inline]
wg_ratelimiter_gc_entries+0x2d8/0x430 drivers/net/wireguard/ratelimiter.c:76
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308