INFO: task syz.0.560:7784 blocked for more than 147 seconds.
Not tainted 6.13.0-rc3-syzkaller-00167-gb3a69c559899 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.560 state:D stack:24128 pid:7784 tgid:7784 ppid:5844 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735
pipe_release+0x48/0x320 fs/pipe.c:727
__fput+0x23c/0xa50 fs/file_table.c:450
task_work_run+0x24f/0x310 kernel/task_work.c:239
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/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: 0033:0x7fbb37785d29
RSP: 002b:00007ffca119b698 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fbb37977ba0 RCX: 00007fbb37785d29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fbb37977ba0 R08: 0000000000000000 R09: 00007ffca119b98f
R10: 00007fbb37977ac0 R11: 0000000000000246 R12: 0000000000021c83
R13: 00007fbb37976080 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
1 lock held by dhcpcd/5498:
2 locks held by dhcpcd/5499:
2 locks held by getty/5592:
#0: ffff88814db8a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000330b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by dhcpcd/5648:
1 lock held by syz-executor/5831:
1 lock held by syz-executor/5836:
1 lock held by syz-executor/5844:
1 lock held by syz-executor/5847:
2 locks held by kworker/u8:9/5940:
1 lock held by syz.0.560/7784:
#0: ffff88805f391c68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_release+0x48/0x320 fs/pipe.c:727
1 lock held by syz.0.560/7791:
#0: ffff88805f391c68 (&pipe->mutex){+.+.}-{4:4}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
1 lock held by syz.2.593/7878:
1 lock held by syz.2.593/7882:
1 lock held by syz.2.593/7889:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00167-gb3a69c559899 #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:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
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: 5648 Comm: dhcpcd Not tainted 6.13.0-rc3-syzkaller-00167-gb3a69c559899 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_release kernel/locking/lockdep.c:5503 [inline]
RIP: 0010:lock_release+0x1d4/0xa30 kernel/locking/lockdep.c:5870
Code: 24 b0 00 00 00 fa 48 c7 c7 a0 a4 0a 8c e8 44 d1 4d 0a 65 ff 05 bd b2 87 7e 48 8d 94 24 80 00 00 00 48 c1 ea 03 42 0f b6 04 3a <84> c0 0f 85 6e 05 00 00 c7 84 24 80 00 00 00 01 00 00 00 48 c7 c0
RSP: 0018:ffffc900036079e0 EFLAGS: 00000802
RAX: 0000000000000004 RBX: 0000000000000046 RCX: ffffffff817ad6b0
RDX: 1ffff920006c0f4c RSI: ffffffff8c0aa4a0 RDI: ffffffff8c5faee0
RBP: ffffc90003607b08 R08: ffffffff90197c37 R09: 1ffffffff2032f86
R10: dffffc0000000000 R11: fffffbfff2032f87 R12: 1ffff920006c0f48
R13: ffffffff8163fed9 R14: ffffc90003607a90 R15: dffffc0000000000
FS: 00007f581f54a740(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f581f622bd0 CR3: 0000000041d22000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
__lock_task_sighand+0x2a0/0x2d0 kernel/signal.c:1384
lock_task_sighand include/linux/sched/signal.h:743 [inline]
do_send_sig_info kernel/signal.c:1267 [inline]
group_send_sig_info+0x274/0x310 kernel/signal.c:1418
bpf_send_signal_common+0x3c4/0x630 kernel/trace/bpf_trace.c:881
____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline]
bpf_send_signal+0x1d/0x30 kernel/trace/bpf_trace.c:884
bpf_prog_7ba5217f62dcd359+0x41/0x45
bpf_dispatcher_nop_func include/linux/bpf.h:1290 [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:2362 [inline]
bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2403
__bpf_trace_sys_enter+0x38/0x60 include/trace/events/syscalls.h:18
__traceiter_sys_enter+0x2b/0x50 include/trace/events/syscalls.h:18
trace_sys_enter+0xb0/0x120 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:169 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline]
do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f581f617ad5
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:00007ffc2fbc1a90 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 000055f05d10fee0 RCX: 00007f581f617ad5
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000055f05d11ad90
RBP: 00007ffc2fbc1de0 R08: 0000000000000008 R09: 0000000000000000
R10: 00007ffc2fbc1de0 R11: 0000000000000246 R12: 0000000000000000
R13: 000055f02109b610 R14: 00000000ffffffff R15: 0000000000000000