INFO: task syz.5.7053:32238 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.7053 state:D stack:26536 pid:32238 tgid:32238 ppid:27100 task_flags:0x400040 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
request_wait_answer+0x55e/0x7d0 fs/fuse/dev.c:585
__fuse_request_send fs/fuse/dev.c:599 [inline]
__fuse_simple_request+0x45b/0xe70 fs/fuse/dev.c:693
fuse_simple_request fs/fuse/fuse_i.h:1263 [inline]
fuse_flush+0x4e4/0x6b0 fs/fuse/file.c:494
filp_flush+0xe7/0x190 fs/open.c:1469
filp_close+0x1c/0x30 fs/open.c:1482
__range_close+0x137/0x7a0 fs/file.c:794
__do_sys_close_range fs/file.c:855 [inline]
__se_sys_close_range fs/file.c:819 [inline]
__x64_sys_close_range+0x3ce/0x5d0 fs/file.c:819
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69e359c799
RSP: 002b:00007ffe10800ca8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffe10800d90 RCX: 00007f69e359c799
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000001cf272 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b31520000 R11: 0000000000000246 R12: 00007ffe10800dd0
R13: 00007f69e3815fac R14: 00000000001cf5a5 R15: 00007f69e3815fa0
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e7e7820 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e7e7820 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e7e7820 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
1 lock held by dhcpcd/5474:
2 locks held by getty/5567:
#0: ffff888029f7d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x1500 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:1/24864:
#0: ffff88813fe67148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1310/0x19a0 kernel/workqueue.c:3251
#1: ffffc90004ddfd08 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x988/0x19a0 kernel/workqueue.c:3252
#2: ffff88805b393240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1b8/0x63b0 drivers/net/netdevsim/fib.c:1490
1 lock held by syz-executor/2318:
#0: ffffffff8e7f3300 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x48/0x6d0 kernel/rcu/tree.c:3828
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xd25/0x1050 kernel/hung_task.c:515
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5475 Comm: dhcpcd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:lockdep_hardirqs_off+0x5b/0xe0 kernel/locking/lockdep.c:4495
Code: 08 85 c0 75 43 5b 5d c3 cc cc cc cc 9c 58 f6 c4 02 74 e7 90 e8 26 e3 62 f9 85 c0 74 0a 8b 05 6c 98 49 05 85 c0 74 68 90 eb db <48> c7 c7 ac 78 e7 8d e8 69 19 00 00 65 8b 15 da eb 7d 08 85 d2 74
RSP: 0018:ffffc900031477f0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff8b931ef2 RCX: ffffffff828f5918
RDX: 1ffff92000628f69 RSI: 0000000000000001 RDI: ffffffff8b931ef2
RBP: 0000000000000282 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003147ae0
R13: ffffc90003147b38 R14: ffffc90003147b40 R15: ffffc90003147b48
FS: 00007f3604c27780(0000) GS:ffff888124342000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f70c5aab6b0 CR3: 00000000346ca000 CR4: 00000000003526f0
Call Trace:
trace_hardirqs_off+0x12/0x190 kernel/trace/trace_preemptirq.c:104
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:130 [inline]
_raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162
remove_wait_queue+0x25/0x180 kernel/sched/wait.c:73
free_poll_entry fs/select.c:132 [inline]
poll_freewait+0xc4/0x250 fs/select.c:141
do_sys_poll+0xb30/0xeb0 fs/select.c:1005
__do_sys_ppoll fs/select.c:1106 [inline]
__se_sys_ppoll fs/select.c:1086 [inline]
__x64_sys_ppoll+0x2b5/0x350 fs/select.c:1086
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3604cb1407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff9255f720 EFLAGS: 00000202 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 00007f3604c27780 RCX: 00007f3604cb1407
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 000055a4fb8c04a0
RBP: 00007fff9255fa60 R08: 0000000000000008 R09: 0000000000000000
R10: 00007fff9255fa60 R11: 0000000000000202 R12: 000055a4cc0f75e0
R13: 000055a4fb8bad40 R14: 0000000000000000 R15: 00007fff9255f810