INFO: task syz.3.596:7023 blocked for more than 145 seconds.
Not tainted 6.12.0-rc3-syzkaller-00158-gd95d9a31aceb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.596 state:D stack:23808 pid:7023 tgid:7023 ppid:5239 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
pipe_release+0x48/0x320 fs/pipe.c:727
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f374bd7dff9
RSP: 002b:00007ffd14c56dc8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f374bf37a80 RCX: 00007f374bd7dff9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f374bf37a80 R08: 0000000000000006 R09: 00007ffd14c570bf
R10: 00000000003ffd50 R11: 0000000000000246 R12: 0000000000015378
R13: 00007ffd14c56ed0 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4984:
#0: ffff88802e45f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by dhcpcd/5035:
1 lock held by syz.3.596/7023:
#0: ffff888074261468 (&pipe->mutex){+.+.}-{3:3}, at: pipe_release+0x48/0x320 fs/pipe.c:727
1 lock held by syz.3.596/7024:
#0: ffff888074261468 (&pipe->mutex){+.+.}-{3:3}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00158-gd95d9a31aceb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__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:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 101 PID: 5035 Comm: dhcpcd Not tainted 6.12.0-rc3-syzkaller-00158-gd95d9a31aceb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0x11a/0x2050 kernel/locking/lockdep.c:5099
Code: 48 be 00 00 00 00 00 fc ff df 48 89 c3 48 85 c0 0f 84 0a 13 00 00 49 8d ac 24 d8 0a 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 38 <0f> b6 04 30 84 c0 0f 85 f5 15 00 00 8b 55 00 48 c7 c0 40 09 3d 9a
RSP: 0018:ffffc90003ad7970 EFLAGS: 00000802
RAX: 1ffff11004a6615b RBX: ffffffff93c43150 RCX: 0000000000000001
RDX: ffffffff93e396c0 RSI: dffffc0000000000 RDI: ffffffff8e937de0
RBP: ffff888025330ad8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff2039fd6 R12: ffff888025330000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8e937de0
FS: 00007f2481192740(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2afcf0c538 CR3: 0000000022fbe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
__lock_task_sighand+0x49/0x2d0 kernel/signal.c:1393
lock_task_sighand include/linux/sched/signal.h:745 [inline]
do_send_sig_info kernel/signal.c:1298 [inline]
group_send_sig_info+0x274/0x310 kernel/signal.c:1449
bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:857
____bpf_send_signal kernel/trace/bpf_trace.c:862 [inline]
bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:860
bpf_prog_7ba5217f62dcd359+0x41/0x45
bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline]
__bpf_prog_run include/linux/filter.h:701 [inline]
bpf_prog_run include/linux/filter.h:708 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2318 [inline]
bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2359
trace_sys_enter+0x93/0xd0 include/trace/events/syscalls.h:18
syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61
syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f24811ccad9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <48> 81 ec b8 00 00 00 41 89 f9 48 89 f0 49 89 d0 48 85 f6 0f 84 be
RSP: 002b:00007fff0e89ed00 EFLAGS: 00000293 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 000055f5723f5e20 RCX: 00007f24811ccad9
RDX: 000055f5474e3610 RSI: 00007fff0e89ee30 RDI: 0000000000000011
RBP: 00007fff0e89f610 R08: 0000000000000008 R09: 0000000000000000
R10: 00007fff0e89f610 R11: 0000000000000293 R12: 0000000000000000
R13: 000055f5474e3610 R14: 00000000ffffffff R15: 0000000000000000