INFO: task syz-executor.1:30391 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:25656 pid:30391 ppid:1122   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6503
 schedule+0xda/0x1b0 kernel/sched/core.c:6579
 wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
 __writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2620
 try_to_writeback_inodes_sb+0x94/0xc0 fs/fs-writeback.c:2668
 ext4_nonda_switch+0x1aa/0x1f0 fs/ext4/inode.c:2950
 ext4_da_write_begin+0x16b/0xab0 fs/ext4/inode.c:2977
 generic_perform_write+0x252/0x570 mm/filemap.c:3771
 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:285
 ext4_file_write_iter+0x8b8/0x16e0 fs/ext4/file.c:700
 __kernel_write_iter+0x25e/0x730 fs/read_write.c:517
 dump_emit_page fs/coredump.c:862 [inline]
 dump_user_range+0x244/0x680 fs/coredump.c:913
 elf_core_dump+0x26de/0x3510 fs/binfmt_elf.c:2311
 do_coredump+0x26ea/0x3c10 fs/coredump.c:760
 get_signal+0x1be1/0x2430 kernel/signal.c:2844
 arch_do_signal_or_restart+0x75/0x5b0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:309
 exc_page_fault+0xbc/0x170 arch/x86/mm/fault.c:1578
 asm_exc_machine_check-0xe/0x40
RIP: 0033:0x7fe12ea8b5b1
RSP: 002b:00000000ffff0300 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fe12ebabf80 RCX: 00007fe12ea8b5a9
RDX: 0000000000000000 RSI: 00000000ffff0300 RDI: 00000000ce008200
RBP: 00007fe12eae67b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffc4f57734f R14: 00007fe12f76f300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xc71/0xfc0 kernel/hung_task.c:377
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14036 Comm: kworker/u4:1 Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_preemption_disabled+0x9/0x170 lib/smp_processor_id.c:13
Code: ff 89 de 0f 1f 44 00 00 85 db 74 07 0f 1f 44 00 00 0f 0b 0f 1f 44 00 00 5b e9 93 fb ff ff cc cc cc 41 56 41 55 49 89 f5 41 54 <55> 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 b1 50 73 76 65 8b 1d a6
RSP: 0018:ffffc90003537988 EFLAGS: 00000006
RAX: 00000000000c09f5 RBX: 00002aaaaaaac000 RCX: ffffffff813701de
RDX: ffffed102803208b RSI: ffffffff8a2990e0 RDI: ffffffff8a299120
RBP: 0000000000039880 R08: 0000000000000001 R09: ffff888140190457
R10: ffffed102803208a R11: 0000000000000001 R12: 000000000000000c
R13: ffffffff8a2990e0 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556eee848 CR3: 000000000ba8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 get_flush_tlb_info arch/x86/mm/tlb.c:950 [inline]
 flush_tlb_mm_range+0xa1/0x4d0 arch/x86/mm/tlb.c:1001
 __text_poke+0x442/0x8e0 arch/x86/kernel/alternative.c:1248
 text_poke arch/x86/kernel/alternative.c:1285 [inline]
 text_poke_bp_batch+0x445/0x6b0 arch/x86/kernel/alternative.c:1641
 text_poke_flush arch/x86/kernel/alternative.c:1745 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:1742 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1752
 kvm_set_cpu_l1tf_flush_l1d-0xd/0x20
 jump_label_update+0x32f/0x410 kernel/jump_label.c:801
 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
 static_key_disable_cpuslocked-0xa/0x1b0
 toggle_allocation_gate mm/kfence/core.c:800 [inline]
 toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:792
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>