INFO: task syz-executor.0:5510 blocked for more than 143 seconds.
Not tainted 6.6.0-rc2-syzkaller-gce9ecca0238b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25400 pid:5510 ppid:5387 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x19b9/0x4b10 kernel/sched/core.c:6695
schedule+0xbf/0x180 kernel/sched/core.c:6771
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6830
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x69f/0xd60 kernel/locking/mutex.c:747
blkdev_put+0xfb/0x770 block/bdev.c:884
blkdev_release+0x82/0x90 block/fops.c:604
__fput+0x3f8/0x910 fs/file_table.c:384
task_work_run+0x246/0x300 kernel/task_work.c:179
get_signal+0x166a/0x1840 kernel/signal.c:2668
arch_do_signal_or_restart+0x92/0x800 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe62a87cae9
RSP: 002b:00007fe62b6840c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fe62a99bf80 RCX: 00007fe62a87cae9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fe62a8c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe62a99bf80 R15: 00007ffcc6d4df38
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d32a960 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8d32a960 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8d32a960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6613
2 locks held by getty/4786:
#0: ffff88814b2320a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ad/0x1db0 drivers/tty/n_tty.c:2206
1 lock held by udevd/5382:
#0: ffff8881417684c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x133/0x620 block/bdev.c:786
1 lock held by syz-executor.0/5510:
#0: ffff8881417684c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x770 block/bdev.c:884
1 lock held by syz-executor.0/5765:
#0: ffff8881417684c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x133/0x620 block/bdev.c:786
1 lock held by syz-executor.0/5781:
#0: ffff8881417684c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x133/0x620 block/bdev.c:786
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller-gce9ecca0238b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x494/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x194/0x2f0 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+0xfa1/0xfe0 kernel/hung_task.c:379
kthread+0x2cf/0x360 kernel/kthread.c:388
ret_from_fork+0x44/0x70 arch/x86/kernel/process.c:147
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: 142 Comm: kworker/u4:6 Not tainted 6.6.0-rc2-syzkaller-gce9ecca0238b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsrl arch/x86/include/asm/msr.h:262 [inline]
RIP: 0010:native_x2apic_icr_write arch/x86/include/asm/apic.h:216 [inline]
RIP: 0010:__x2apic_send_IPI_dest arch/x86/kernel/apic/x2apic_phys.c:113 [inline]
RIP: 0010:x2apic_send_IPI+0x77/0xd0 arch/x86/kernel/apic/x2apic_phys.c:50
Code: 48 c1 e8 03 42 0f b6 04 38 84 c0 75 26 0f b7 13 0f ae f0 0f ae e8 41 83 fe 02 b8 00 04 00 00 41 0f 45 c6 b9 30 08 00 00 0f 30 <66> 90 5b 41 5e 41 5f 5d c3 89 d9 80 e1 07 fe c1 38 c1 7c cf 48 89
RSP: 0018:ffffc90002cef6f8 EFLAGS: 00000206
RAX: 00000000000000fb RBX: ffff8880b99219c8 RCX: 0000000000000830
RDX: 0000000000000001 RSI: 00000000000000fb RDI: 0000000000000001
RBP: ffffffff8cdf2908 R08: ffffffff8181f187 R09: 1ffffffff1d356d5
R10: dffffc0000000000 R11: fffffbfff1d356d6 R12: dffffc0000000000
R13: ffff8880b983c440 R14: 00000000000000fb R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a611c0a680 CR3: 000000000d12f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:103 [inline]
send_call_function_single_ipi kernel/smp.c:117 [inline]
smp_call_function_many_cond+0x13f2/0x2880 kernel/smp.c:826
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1012
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1998 [inline]
text_poke_bp_batch+0x71e/0xb20 arch/x86/kernel/alternative.c:2270
text_poke_flush arch/x86/kernel/alternative.c:2399 [inline]
text_poke_finish+0x2c/0x40 arch/x86/kernel/alternative.c:2406
arch_jump_label_transform_apply+0x18/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x12e/0x250 kernel/jump_label.c:205
static_key_enable+0x16/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb1/0x250 mm/kfence/core.c:830
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0x90b/0x1400 kernel/workqueue.c:2703
worker_thread+0xa5b/0xff0 kernel/workqueue.c:2784
kthread+0x2cf/0x360 kernel/kthread.c:388
ret_from_fork+0x44/0x70 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304