INFO: task syz-executor.0:6201 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-gbf9aa14fc523 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25656 pid:6201 tgid:6200 ppid:6148 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735
bdev_release+0x17e/0x700 block/bdev.c:1087
blkdev_release+0x15/0x20 block/fops.c:635
__fput+0x23e/0xa50 fs/file_table.c:450
task_work_run+0x251/0x310 kernel/task_work.c:239
get_signal+0x15f7/0x1750 kernel/signal.c:2789
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4e4a27cb29
RSP: 002b:00007f4e4afeb0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f4e4a39bf80 RCX: 00007f4e4a27cb29
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f4e4a2c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4e4a39bf80 R15: 00007fff61bd2278
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e93c7e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c7e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c7e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:4/80:
#0: ffff8880b873ea98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffffffff9a604208 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_deactivate+0x158/0x390 lib/debugobjects.c:873
2 locks held by getty/5598:
#0: ffff8880312620a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032232f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by udevd/6157:
#0: ffff8880256ca4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
1 lock held by syz-executor.0/6201:
#0: ffff8880256ca4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x17e/0x700 block/bdev.c:1087
1 lock held by syz-executor.0/6523:
#0: ffff8880256ca4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
1 lock held by syz-executor.0/6540:
#0: ffff8880256ca4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-gbf9aa14fc523 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 47 Comm: kworker/1:1 Not tainted 6.12.0-syzkaller-gbf9aa14fc523 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:__lock_acquire+0xc94/0x2100 kernel/locking/lockdep.c:5196
Code: 83 3d 2f 92 ce 18 00 75 39 48 63 9c 24 88 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 a8 2e 94 be 08 00 00 00 e8 ec 6e 8e 00 <48> bf 00 00 00 00 00 fc ff df 48 0f a3 1d ba 20 be 12 0f 83 66 09
RSP: 0018:ffffc90000b778f0 EFLAGS: 00000056
RAX: 0000000000000001 RBX: 00000000000007e6 RCX: ffffffff817087b4
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942ea978
RBP: ffff8880216ba930 R08: ffffffff942ea97f R09: 1ffffffff285d52f
R10: dffffc0000000000 R11: fffffbfff285d530 R12: ffff8880216ba8c4
R13: ffff8880216b9e00 R14: 0000000000000000 R15: ffff8880216ba950
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557ab42f60a8 CR3: 000000000e738000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
wg_ratelimiter_gc_entries+0x60/0x470 drivers/net/wireguard/ratelimiter.c:63
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244