INFO: task syz-executor.0:5191 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-next-20240125-syzkaller-g01af33cc9894 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27968 pid:5191 tgid:5190 ppid:5142 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6804 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6819
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6876
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
bdev_release+0xcd/0xa80 block/bdev.c:969
blkdev_release+0x37/0x50 block/fops.c:631
__fput+0x270/0xb80 fs/file_table.c:376
task_work_run+0x14e/0x250 kernel/task_work.c:180
get_signal+0x105e/0x2760 kernel/signal.c:2669
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x153/0x2b0 kernel/entry/common.c:212
do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x4551e9
RSP: 002b:00007fb4fd50c0d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 000000000054cf00 RCX: 00000000004551e9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00000000004a06fd R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049f8fd
R13: 000000000000000b R14: 000000000054cf00 R15: 00007ffef583dd68
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d5b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d5b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d5b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
1 lock held by klogd/4504:
#0: ffff8880b943cb18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
2 locks held by getty/4820:
#0: ffff88802f8c20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by udevd/5146:
#0: ffff8880205f24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x276/0xec0 block/bdev.c:859
1 lock held by syz-executor.0/5191:
#0: ffff8880205f24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0xcd/0xa80 block/bdev.c:969
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-next-20240125-syzkaller-g01af33cc9894 #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+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf86/0x1210 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3791 Comm: kworker/u4:9 Not tainted 6.8.0-rc1-next-20240125-syzkaller-g01af33cc9894 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__lock_acquire+0xe1d/0x3b30 kernel/locking/lockdep.c:5164
Code: b9 5f 7b 00 48 8b 1c 24 8b 83 d0 0a 00 00 89 44 24 08 83 c0 01 83 f8 2f 89 83 d0 0a 00 00 0f 87 ec 11 00 00 39 05 73 4b af 11 <0f> 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc9000c5d7638 EFLAGS: 00000012
RAX: 0000000000000006 RBX: ffff88802dfcbc00 RCX: 0000000004879746
RDX: 1ffff11005bf98da RSI: 0000000000000001 RDI: ffffffff93ae4de8
RBP: ffffffff93ae3bb0 R08: 0000000000000000 R09: fffffbfff275c5f8
R10: ffffffff93ae2fc7 R11: 0000000000000005 R12: ffffed1005bf98da
R13: 0000000000000021 R14: ffff88802dfcc7a0 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d8a1e9a680 CR3: 000000000d37a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:750 [inline]
__pte_offset_map+0x48/0x540 mm/pgtable-generic.c:285
__pte_offset_map_lock+0x8e/0x300 mm/pgtable-generic.c:369
pte_offset_map_lock include/linux/mm.h:2958 [inline]
__get_locked_pte+0x79/0xc0 mm/memory.c:1953
get_locked_pte include/linux/mm.h:2683 [inline]
__text_poke+0x224/0xcb0 arch/x86/kernel/alternative.c:1900
text_poke_bp_batch+0x493/0x760 arch/x86/kernel/alternative.c:2374
text_poke_flush arch/x86/kernel/alternative.c:2487 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2484 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2494
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate mm/kfence/core.c:826 [inline]
toggle_allocation_gate+0xf8/0x250 mm/kfence/core.c:818
process_one_work+0x8d5/0x16e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2707 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2788
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242