INFO: task syz.2.697:9829 blocked for more than 143 seconds.
      Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.697       state:D stack:25216 pid:9829  tgid:9827  ppid:8904   task_flags:0x400740 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common+0x3ef/0x6e0 kernel/sched/completion.c:116
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:418 [inline]
 do_coredump+0xa62/0x32c0 fs/coredump.c:575
 get_signal+0x13e5/0x1720 kernel/signal.c:3021
 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: 0033:0x7f394f04e750
RSP: 002b:00007f394ff6ea78 EFLAGS: 00000246 ORIG_RAX: 000000000000014e
RAX: 0000000000000000 RBX: 00007f394f3a6080 RCX: 00007f394f18d169
RDX: 00007f394ff6ea80 RSI: 00007f394ff6ebb0 RDI: 000000000000000b
RBP: 00007f394f20e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f394f3a6080 R15: 00007fffdd97ce88
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
 #0: ffffffff8eb38fa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8eb38fa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8eb38fa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by kworker/u8:2/35:
2 locks held by getty/5585:
 #0: ffff88814d7cd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
2 locks held by kworker/u8:8/5910:
2 locks held by kworker/u8:19/7030:
1 lock held by syz-executor/11039:
2 locks held by syz.1.1020/11558:
1 lock held by syz.6.1026/11585:
 #0: ffff888060a0a0e0 (&type->s_umount_key#60/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
2 locks held by rm/11618:

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __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:236 [inline]
 watchdog+0x1058/0x10a0 kernel/hung_task.c:399
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8097 Comm: udevd Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__lock_acquire+0x447/0x2100 kernel/locking/lockdep.c:5170
Code: e1 0f 0f b7 c9 09 d9 8b 5c 24 38 83 e3 03 c1 e3 10 09 cb 8b 4c 24 58 83 e1 01 c1 e1 12 c1 e0 14 31 d2 83 7c 24 28 00 0f 95 c2 <c1> e2 13 c1 e5 15 09 d5 09 c5 09 cd 09 dd 48 8b 44 24 18 0f b6 04
RSP: 0018:ffffc90000a18890 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000002048 RCX: 0000000000040000
RDX: 0000000000000001 RSI: dffffc0000000000 RDI: ffff8880331da8f0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2079e2f R12: ffff8880331da8d4
R13: 000000000000000a R14: 0000000000000048 R15: ffff88801b098018
FS:  00007fcb910c0c80(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557a535c8 CR3: 000000005a61c000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 __queue_work+0x782/0x1090
 call_timer_fn+0x189/0x650 kernel/time/timer.c:1789
 expire_timers kernel/time/timer.c:1835 [inline]
 __run_timers kernel/time/timer.c:2414 [inline]
 __run_timer_base+0x695/0x8e0 kernel/time/timer.c:2426
 run_timer_base kernel/time/timer.c:2435 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445
 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline]
RIP: 0010:vprintk_emit+0x700/0xa10 kernel/printk/printk.c:2431
Code: 00 e8 b4 31 21 00 4c 8d bc 24 a0 00 00 00 4d 85 e4 75 07 e8 a2 31 21 00 eb 06 e8 9b 31 21 00 fb 49 bc 00 00 00 00 00 fc ff df <48> c7 c7 60 4b a1 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc9000453f7e0 EFLAGS: 00000293
RAX: ffffffff81a08d85 RBX: 0000000000000000 RCX: ffff8880331d9e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000453f8f0 R08: ffffffff81a08d5e R09: 1ffffffff2079e2e
R10: dffffc0000000000 R11: fffffbfff2079e2f R12: dffffc0000000000
R13: 1ffff920008a7f00 R14: ffffffff81a08bc0 R15: ffffc9000453f880
 devkmsg_emit+0xda/0x120 kernel/printk/printk.c:755
 devkmsg_write+0x31d/0x3e0 kernel/printk/printk.c:818
 do_iter_readv_writev+0x71c/0x9d0
 vfs_writev+0x38b/0xbc0 fs/read_write.c:1050
 do_writev+0x1b6/0x360 fs/read_write.c:1096
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb9119ae03
Code: 89 c7 48 89 44 24 08 e8 6a f2 f9 ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6d 48 8b 15 f6 5f 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd504275c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcb9119ae03
RDX: 0000000000000005 RSI: 00007ffd50427630 RDI: 0000000000000005
RBP: 00007ffd50427630 R08: 00007ffd504276a7 R09: 00007ffd50426f48
R10: 000000000000001e R11: 0000000000000246 R12: 000000000000001b
R13: 00007ffd50427758 R14: 0000000000000000 R15: 00007ffd504276b8
 </TASK>