INFO: task syz.4.1218:10598 blocked for more than 148 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.4.1218      state:D stack:27696 pid:10598 tgid:10594 ppid:10334  flags:0x00004004
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_force_forget fs/fuse/readdir.c:282 [inline]
 parse_dirplusfile fs/fuse/readdir.c:324 [inline]
 fuse_readdir_uncached fs/fuse/readdir.c:370 [inline]
 fuse_readdir+0x1f4e/0x3220 fs/fuse/readdir.c:599
 iterate_dir+0x571/0x800 fs/readdir.c:108
 __do_sys_getdents fs/readdir.c:324 [inline]
 __se_sys_getdents+0x1ef/0x4d0 fs/readdir.c:309
 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: 0033:0x7f4b2437dff9
RSP: 002b:00007f4b25190038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f4b24536058 RCX: 00007f4b2437dff9
RDX: 00000000000000e2 RSI: 0000000020000a40 RDI: 0000000000000005
RBP: 00007f4b243f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4b24536058 R15: 00007ffd6132bb88
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 4688 Comm: udevd 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:kmem_cache_free+0xb/0x420 mm/slub.c:4702
Code: ff 48 ff c9 48 89 c8 e9 62 ff ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 <41> 54 53 48 83 ec 28 48 89 f3 65 48 8b 04 25 28 00 00 00 48 89 44
RSP: 0018:ffffc9000d0ef828 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 1ffff11008a25583 RCX: ffff88807cb20000
RDX: 0000000000000000 RSI: ffff88804512abd0 RDI: ffff888140aaf3c0
RBP: ffff88804512ac18 R08: ffffffff81620fad R09: 1ffffffff1cfdaaa
R10: dffffc0000000000 R11: fffffbfff1cfdaab R12: 1ffff11008a2557c
R13: ffff88804512abd0 R14: ffffffff8e7ed4c0 R15: dffffc0000000000
FS:  00007f28bd490c80(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555ee0585c98 CR3: 000000007cf5e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __sigqueue_free kernel/signal.c:451 [inline]
 collect_signal kernel/signal.c:594 [inline]
 __dequeue_signal+0x4ac/0x5c0 kernel/signal.c:616
 dequeue_signal+0x1e0/0x680 kernel/signal.c:637
 signalfd_dequeue fs/signalfd.c:162 [inline]
 signalfd_read_iter+0x462/0x16a0 fs/signalfd.c:216
 new_sync_read fs/read_write.c:488 [inline]
 vfs_read+0x9bb/0xbc0 fs/read_write.c:569
 ksys_read+0x183/0x2b0 fs/read_write.c:712
 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: 0033:0x7f28bd116b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc997594d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f28bd116b6a
RDX: 0000000000000080 RSI: 00007ffc997596b8 RDI: 0000000000000008
RBP: 000000000000000b R08: 000000002fee233c R09: 7fffffffffffffff
R10: 00007f28bd5970b8 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000200000001 R14: 0000000000000001 R15: 0000000000000000
 </TASK>