INFO: task syz.1.27:3755 blocked for more than 143 seconds.
Not tainted 6.1.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.27 state:D stack:25832 pid:3755 ppid:3635 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
perf_pending_task_sync kernel/events/core.c:5029 [inline]
_free_event+0x169/0x1090 kernel/events/core.c:5035
put_event kernel/events/core.c:5160 [inline]
perf_event_release_kernel+0x873/0x900 kernel/events/core.c:5285
perf_release+0x37/0x40 kernel/events/core.c:5295
__fput+0x3f6/0x8d0 fs/file_table.c:320
task_work_run+0x246/0x300 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f153577def9
RSP: 002b:00007ffefbc2dc18 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000fa6c RCX: 00007f153577def9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f1535937a80 R08: 0000000000000001 R09: 00007ffefbc2df0f
R10: 00007f1535400000 R11: 0000000000000246 R12: 000000000000fab6
R13: 00007ffefbc2dd20 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32b1d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32b9d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by udevd/3092:
1 lock held by dhcpcd/3306:
2 locks held by getty/3393:
#0: ffff88814b55b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198
1 lock held by syz-executor/3641:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ae/0x3f0 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+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3305 Comm: dhcpcd Not tainted 6.1.111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:lockdep_hardirqs_on_prepare+0x1d5/0x7a0 kernel/locking/lockdep.c:4312
Code: 00 00 00 00 fc ff df 4c 89 7c 24 18 48 8b 44 24 10 4c 8b b0 d0 0a 00 00 48 8d b8 b8 0a 00 00 48 89 f8 48 c1 e8 03 80 3c 10 00 <74> 05 e8 a4 e5 77 00 48 8b 5c 24 10 4c 89 b3 b8 0a 00 00 48 c7 c7
RSP: 0018:ffffc9000350fbe0 EFLAGS: 00000046
RAX: 1ffff110058e08c7 RBX: 1ffff920006a1f84 RCX: ffffffff97333103
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff88802c704638
RBP: ffffc9000350fc88 R08: dffffc0000000000 R09: fffffbfff1d33cae
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff817a35be
R13: 0000000000000200 R14: ffffffffffffffff R15: 1ffff920006a1f80
FS: 00007f255015a740(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4a8a5a6040 CR3: 0000000028509000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
seqcount_lockdep_reader_access+0x153/0x220 include/linux/seqlock.h:104
ktime_get_ts64+0x9e/0x4a0 kernel/time/timekeeping.c:979
poll_select_set_timeout fs/select.c:285 [inline]
__do_sys_ppoll fs/select.c:1113 [inline]
__se_sys_ppoll+0x1ba/0x330 fs/select.c:1101
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2550227ad5
Code: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffe05105f60 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 0000562564399e20 RCX: 00007f2550227ad5
RDX: 00007ffe05105f80 RSI: 0000000000000004 RDI: 00005625643a4b60
RBP: 00007ffe051062b0 R08: 0000000000000008 R09: 0000000000000010
R10: 00007ffe051062b0 R11: 0000000000000246 R12: 00007ffe05105fa8
R13: 0000562546908610 R14: 00000000ffffffff R15: 0000000000000000