INFO: task syz-executor.3:24093 blocked for more than 143 seconds.
Not tainted 6.9.0-syzkaller-08544-g4b377b4868ef #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28784 pid:24093 tgid:24080 ppid:5117 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
vmsplice_to_pipe fs/splice.c:1555 [inline]
__do_sys_vmsplice fs/splice.c:1624 [inline]
__se_sys_vmsplice+0x5fd/0x1410 fs/splice.c:1598
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4c2ee7cee9
RSP: 002b:00007f4c2e9de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000116
RAX: ffffffffffffffda RBX: 00007f4c2efac050 RCX: 00007f4c2ee7cee9
RDX: 0000000000000008 RSI: 0000000020000940 RDI: 0000000000000008
RBP: 00007f4c2eec949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f4c2efac050 R15: 00007fffd6b22998
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4846:
#0: ffff88802b3960a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/u8:16/8536:
1 lock held by syz-executor.3/24082:
#0: ffff888023fce868 (&pipe->mutex){+.+.}-{3:3}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
1 lock held by syz-executor.3/24093:
#0: ffff888023fce868 (&pipe->mutex){+.+.}-{3:3}, at: vmsplice_to_pipe fs/splice.c:1555 [inline]
#0: ffff888023fce868 (&pipe->mutex){+.+.}-{3:3}, at: __do_sys_vmsplice fs/splice.c:1624 [inline]
#0: ffff888023fce868 (&pipe->mutex){+.+.}-{3:3}, at: __se_sys_vmsplice+0x5fd/0x1410 fs/splice.c:1598
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 31 Comm: khungtaskd Not tainted 6.9.0-syzkaller-08544-g4b377b4868ef #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 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
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 24094 Comm: syz-executor.4 Not tainted 6.9.0-syzkaller-08544-g4b377b4868ef #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__send_signal_locked+0xb3f/0xdc0 kernel/signal.c:1187
Code: fa e8 85 6b 00 00 31 db 4c 8b 6c 24 30 31 ff 44 89 fe e8 54 0a 3a 00 31 c9 45 85 ff 0f 95 c1 89 ef 4c 89 ee 4c 89 e2 45 89 f0 <e8> 5c 78 00 00 89 d8 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3
RSP: 0018:ffffc90010ba7bb0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888020dfda00 RSI: 0000000000000001 RDI: 0000000000000021
RBP: 0000000000000021 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8880820f6560 R11: ffffed101041ecb1 R12: ffff888020dfda00
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
FS: 00005555844b2480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558b4f1da8 CR3: 000000007473e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
do_send_sig_info kernel/signal.c:1301 [inline]
group_send_sig_info+0x292/0x310 kernel/signal.c:1453
bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:881
____bpf_send_signal_thread kernel/trace/bpf_trace.c:898 [inline]
bpf_send_signal_thread+0x16/0x20 kernel/trace/bpf_trace.c:896
bpf_prog_b7be628660dc1b90+0x22/0x28
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline]
bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2444
trace_sys_exit include/trace/events/syscalls.h:44 [inline]
syscall_exit_work+0x171/0x190 kernel/entry/common.c:169
syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
syscall_exit_to_user_mode+0x273/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0b08a7a667
Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d f2 01 c6 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 b3 68 fd ff 0f 1f 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 66 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ffd4021a1c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: 0000000000000d5f RBX: 00007ffd4021a330 RCX: 00007f0b08a7a667
RDX: 00007ffd4021a200 RSI: 00007ffd4021a330 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd4021a817
R10: 0000000000000008 R11: 0000000000000202 R12: 00007ffd4021aa10
R13: 00007f0b09761000 R14: 00007f0b097816c0 R15: 00007ffd4021a818
</TASK>