INFO: task syz-executor.2:8215 blocked for more than 143 seconds.
      Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:23736 pid:8215  ppid:3638   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5178 [inline]
 __schedule+0x8f3/0xd90 kernel/sched/core.c:6490
 schedule+0xcb/0x190 kernel/sched/core.c:6566
 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:3745
 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+0x1854/0x2890 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:166
 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:307
 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: 0033:0x7f8b3348b5b1
RSP: 002b:0000000020000290 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f8b335abf80 RCX: 00007f8b3348b5a9
RDX: 00000000200002c0 RSI: 0000000020000290 RDI: 000000004a000000
RBP: 00007f8b334e6580 R08: 0000000020000340 R09: 0000000020000340
R10: 0000000020000300 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffce82b865f R14: 00007f8b3459f300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x169/0x280 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+0xcd5/0xd20 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11076 Comm: kworker/u4:12 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:bcmp+0x0/0x1e0 lib/string.c:788
Code: 80 e1 07 38 c1 7c ce 49 89 d5 e8 9b 8f 71 fd 4c 89 ea eb c1 31 db 89 d8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 00 <55> 41 57 41 56 41 55 41 54 53 50 49 89 d6 49 89 f7 49 89 fc 48 ba
RSP: 0018:ffffc900039af918 EFLAGS: 00000246
RAX: 000000000000004c RBX: 1ffffffff1f34fb3 RCX: ffff88801ae2d880
RDX: 0000000000000005 RSI: ffffffff8aa73eaa RDI: ffffffff8aa73eaa
RBP: ffffc900039afa48 R08: 1ffffffff1f34fb3 R09: ffffffff846f19ab
R10: 0000000000000002 R11: ffff88801ae2d880 R12: ffffffff8f9a7d90
R13: 0000000000dc3d9f R14: ffffffff8f9a7d99 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ca09720368 CR3: 000000000ca8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 text_poke_loc_init+0x2c2/0x510 arch/x86/kernel/alternative.c:1634
 arch_jump_label_transform_queue+0x70/0xd0 arch/x86/kernel/jump_label.c:138
 __jump_label_update+0x19b/0x3b0 kernel/jump_label.c:447
 static_key_disable_cpuslocked+0xc8/0x1b0 kernel/jump_label.c:207
 static_key_disable+0x16/0x20 kernel/jump_label.c:215
 toggle_allocation_gate+0x3d8/0x470 mm/kfence/core.c:825
 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>