INFO: task syz-executor.5:21458 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc1-syzkaller-00249-g4da34b7d175d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:23320 pid:21458 ppid:3764   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0x8fc/0xda0 kernel/sched/core.c:6503
 schedule+0xcb/0x190 kernel/sched/core.c:6579
 wb_wait_for_completion+0x165/0x290 fs/fs-writeback.c:191
 __writeback_inodes_sb_nr+0x2f0/0x3d0 fs/fs-writeback.c:2620
 try_to_writeback_inodes_sb+0xa5/0xd0 fs/fs-writeback.c:2668
 ext4_nonda_switch fs/ext4/inode.c:2950 [inline]
 ext4_da_write_begin+0x243/0x760 fs/ext4/inode.c:2977
 generic_perform_write+0x314/0x610 mm/filemap.c:3753
 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285
 ext4_file_write_iter+0x1d0/0x18e0
 __kernel_write_iter+0x323/0x770 fs/read_write.c:517
 dump_emit_page+0xa79/0xca0 fs/coredump.c:857
 dump_user_range+0x5b/0xf0 fs/coredump.c:908
 elf_core_dump+0x3d5b/0x4570 fs/binfmt_elf.c:2311
 do_coredump+0x1874/0x2900 fs/coredump.c:755
 get_signal+0x147e/0x1810 kernel/signal.c:2844
 arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:203
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:309
 exc_general_protection+0x348/0x4e0 arch/x86/kernel/traps.c:721
 asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f5ed908b601
RSP: 002b:0000000020000150 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f5ed91abf80 RCX: 00007f5ed908b5f9
RDX: 0000000020000180 RSI: 0000000020000150 RDI: 0000000000000000
RBP: 00007f5ed90e67b0 R08: 0000000020000200 R09: 0000000020000200
R10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0ac8cb7f R14: 00007f5eda259300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc1-syzkaller-00249-g4da34b7d175d #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+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x4e3/0x560 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x19b/0x3e0 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+0xcf5/0xd40 kernel/hung_task.c:377
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13949 Comm: kworker/0:15 Not tainted 6.1.0-rc1-syzkaller-00249-g4da34b7d175d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:preempt_count_add+0x56/0x180 kernel/sched/core.c:5655
Code: 20 10 00 75 07 65 8b 05 50 a0 a5 7e 65 01 1d 49 a0 a5 7e 48 c7 c0 40 cf 7c 91 48 c1 e8 03 42 8a 04 38 84 c0 0f 85 db 00 00 00 <83> 3d 63 00 20 10 00 75 11 65 8b 05 22 a0 a5 7e 0f b6 c0 3d f5 00
RSP: 0018:ffffc9000aed7538 EFLAGS: 00000097
RAX: 1ffffffff22f9904 RBX: 0000000000000001 RCX: ffffffff917ccf03
RDX: dffffc0000000000 RSI: ffffc9000aed8000 RDI: 0000000000000001
RBP: 1ffff920015daed4 R08: dffffc0000000001 R09: ffffc9000aed76a0
R10: fffff520015daee0 R11: 1ffff920015daed4 R12: ffffc9000aed76d8
R13: ffffc9000aed76e8 R14: ffffffff813c14bd R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a3cecbc988 CR3: 000000000ca8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unwind_next_frame+0xc3/0x24c0 arch/x86/kernel/unwind_orc.c:433
 __unwind_start+0x5b7/0x760 arch/x86/kernel/unwind_orc.c:717
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xdc/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
 insert_work+0x54/0x3e0 kernel/workqueue.c:1358
 __queue_work+0xaaa/0xd60 kernel/workqueue.c:1517
 queue_delayed_work_on+0x142/0x250 kernel/workqueue.c:1701
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>