INFO: task syz.0.436:8576 blocked for more than 149 seconds.
      Not tainted 6.12.0-rc2-next-20241008-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.436       state:D stack:24688 pid:8576  tgid:8576  ppid:8252   flags:0x00004006
Call Trace:
 <TASK>
 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
 request_wait_answer fs/fuse/dev.c:464 [inline]
 __fuse_request_send fs/fuse/dev.c:478 [inline]
 __fuse_simple_request+0xe17/0x1840 fs/fuse/dev.c:572
 fuse_simple_request fs/fuse/fuse_i.h:1156 [inline]
 fuse_flush+0x69d/0x950 fs/fuse/file.c:542
 filp_flush+0xac/0x150 fs/open.c:1525
 filp_close+0x1e/0x40 fs/open.c:1538
 __range_close fs/file.c:703 [inline]
 __close_range+0x380/0x6c0 fs/file.c:760
 __do_sys_close_range fs/open.c:1591 [inline]
 __se_sys_close_range fs/open.c:1588 [inline]
 __x64_sys_close_range+0x7a/0x90 fs/open.c:1588
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb8b77dff9
RSP: 002b:00007ffd7b55adc8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 0000000000080f33 RCX: 00007fcb8b77dff9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fcb8b937a80 R08: 0000000000000001 R09: 00007ffd7b55b0bf
R10: 00007fcb8b600000 R11: 0000000000000246 R12: 0000000000080fae
R13: 00007ffd7b55aed0 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-next-20241008-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8928 Comm: syz.0.461 Not tainted 6.12.0-rc2-next-20241008-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:preempt_count_sub+0x0/0x170 kernel/sched/core.c:5812
Code: 8c 77 ff ff ff 48 c7 c7 80 71 1d 90 e8 19 6c 9b 00 e9 66 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 56 53 89 fb 48 c7 c0 40 f9 3d 9a 48 c1 e8 03 49 be
RSP: 0018:ffffc90003dd7648 EFLAGS: 00000002
RAX: ffffc90003dd8000 RBX: ffffc90003dd7730 RCX: ffffc90003dd7ee0
RDX: dffffc0000000000 RSI: ffffc90003dd0000 RDI: 0000000000000001
RBP: ffffc90003dd7720 R08: ffffc90003dd7ec8 R09: 0000000000000000
R10: ffffc90003dd7770 R11: fffff520007baef0 R12: dffffc0000000000
R13: ffffc90003dd7720 R14: ffffc90003dd0000 R15: ffffc90003dd7ed8
FS:  00007fe93c1f96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2db1ff40 CR3: 000000005f41a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 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:250 [inline]
 slab_post_alloc_hook mm/slub.c:4111 [inline]
 slab_alloc_node mm/slub.c:4160 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4167
 __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: 0033:0x7fe93c319959
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:00007fe93c1f8b40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007fe93c535f88 RCX: 00007fe93c319959
RDX: 00007fe93c1f8b40 RSI: 00007fe93c1f8c70 RDI: 0000000000000011
RBP: 00007fe93c535f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe93c535f8c
R13: 0000000000000000 R14: 00007ffee20f5d80 R15: 00007ffee20f5e68
 </TASK>