INFO: task syz.1.1288:11414 blocked for more than 145 seconds.
Not tainted 6.12.0-rc2-syzkaller-00543-g6aac56631831 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1288 state:D stack:23808 pid:11414 tgid:11414 ppid:9235 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: 0033:0x7f19eef7dff9
RSP: 002b:00007ffd118a3ec8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f19ef137a80 RCX: 00007f19eef7dff9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f19ef137a80 R08: 0000000000000006 R09: 00007ffd118a41bf
R10: 00000000005e70a8 R11: 0000000000000246 R12: 00000000000a99e3
R13: 00007ffd118a3fd0 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 udevd/4686:
2 locks held by getty/4984:
#0: ffff8880326e10a0 (&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 syz-executor/5218:
1 lock held by syz-executor/9236:
1 lock held by udevd/9809:
1 lock held by syz.1.1288/11414:
#0: ffff888056ca8468 (&pipe->mutex){+.+.}-{3:3}, at: pipe_release+0x48/0x320 fs/pipe.c:727
1 lock held by syz.1.1288/11416:
#0: ffff888056ca8468 (&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-rc2-syzkaller-00543-g6aac56631831 #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: 0 PID: 9236 Comm: syz-executor Not tainted 6.12.0-rc2-syzkaller-00543-g6aac56631831 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:preempt_count_sub+0x66/0x170 kernel/sched/core.c:5829
Code: c1 81 e1 ff ff ff 7f 39 d9 7c 27 81 fb fe 00 00 00 77 07 0f b6 c0 85 c0 74 5f 65 8b 05 bb 99 a0 7e f7 db 65 01 1d b2 99 a0 7e <5b> 41 5e c3 cc cc cc cc 90 e8 1c 49 55 03 85 c0 74 3a 48 c7 c0 00
RSP: 0018:ffffc900040e7658 EFLAGS: 00000093
RAX: 0000000080000003 RBX: 00000000ffffffff RCX: 0000000000000003
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc900040e7740 R08: ffffc900040e779f R09: 0000000000000000
R10: ffffc900040e7790 R11: fffff5200081cef4 R12: dffffc0000000000
R13: ffffc900040e7740 R14: dffffc0000000000 R15: ffffc900040e7ee0
FS: 0000555579f6c500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d006ff8 CR3: 0000000059446000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x18e6/0x22d0 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4085 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4141
__sigqueue_alloc+0x42e/0x540 kernel/signal.c:428
__send_signal_locked+0x22f/0xdc0 kernel/signal.c:1117
do_send_sig_info kernel/signal.c:1299 [inline]
group_send_sig_info+0x292/0x310 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: 0033:0x7f5bbbf19959
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 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 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007ffcca9ab840 EFLAGS: 00000293 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f5bbbf19959
RDX: 00007ffcca9ab840 RSI: 00007ffcca9ab970 RDI: 0000000000000011
RBP: 00007ffcca9abe2c R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000a9a60 R14: 00000000000a988f R15: 00007ffcca9abe80