INFO: task syz-executor.4:20180 blocked for more than 143 seconds.
      Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:25472 pid:20180 ppid:  3630 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5183 [inline]
 __schedule+0xadf/0x52b0 kernel/sched/core.c:6495
 schedule+0xda/0x1b0 kernel/sched/core.c:6571
 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+0x16d/0xae0 fs/ext4/inode.c:2977
 generic_perform_write+0x246/0x560 mm/filemap.c:3745
 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:858 [inline]
 dump_user_range+0x230/0x700 fs/coredump.c:909
 elf_core_dump+0x26de/0x3510 fs/binfmt_elf.c:2311
 do_coredump+0x28bc/0x3df0 fs/coredump.c:756
 get_signal+0x1d63/0x2610 kernel/signal.c:2843
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:307
 asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f3efea8a5b1
RSP: 002b:0000000020000260 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f3efebabf80 RCX: 00007f3efea8a5a9
RDX: 0000000020000280 RSI: 0000000020000260 RDI: 000000004c000000
RBP: 00007f3efeae5580 R08: 0000000020000300 R09: 0000000020000300
R10: 00000000200002c0 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffe4e65b13f R14: 00007f3effbf9300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #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+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xc18/0xf50 kernel/hung_task.c:369
 kthread+0x2e4/0x3a0 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: 21561 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0033:0x7f37c6237791
Code: ff 41 08 c5 0f 85 f7 01 00 00 41 83 c6 01 44 39 73 04 0f 86 b7 00 00 00 48 8b 04 24 44 89 f7 48 8b 53 28 4d 89 f8 48 03 14 f8 <80> 3d 20 09 17 00 00 49 89 d7 89 d5 75 37 b8 00 00 00 80 48 01 d0
RSP: 002b:00007ffffadd57e0 EFLAGS: 00000286
RAX: 00007f37c6000008 RBX: 00007f37c63ac018 RCX: 0000001b2db20000
RDX: ffffffff81ad8dbe RSI: 0000001b2db25f70 RDI: 0000000000024bea
RBP: 000000002da61d1c R08: ffffffff81ad8dac R09: 000000002da61d20
R10: 00007ffffadeb090 R11: 0000000000042d6a R12: 00007f37c63a0000
R13: 0000000000000001 R14: 0000000000024bea R15: ffffffff81ad8dac
FS:  00005555565ca400 GS:  0000000000000000