INFO: task syz-executor.1:30264 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.1  state:D stack:25336 pid:30264 ppid:3619   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5178 [inline]
 __schedule+0xadf/0x5270 kernel/sched/core.c:6490
 schedule+0xda/0x1b0 kernel/sched/core.c:6566
 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:857 [inline]
 dump_user_range+0x230/0x700 fs/coredump.c:908
 elf_core_dump+0x26de/0x3510 fs/binfmt_elf.c:2311
 do_coredump+0x2732/0x3c40 fs/coredump.c:755
 get_signal+0x1be1/0x2430 kernel/signal.c:2844
 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: 0033:0x7f4e5028b5b1
RSP: 002b:00000000200003e0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f4e503ac050 RCX: 00007f4e5028b5a9
RDX: 0000000020000400 RSI: 00000000200003e0 RDI: 0000000012200000
RBP: 00007f4e502e6580 R08: 0000000020000480 R09: 0000000020000480
R10: 0000000020000440 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffffedc26df R14: 00007f4e514a8300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 28 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+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:220 [inline]
 watchdog+0xbf9/0xf30 kernel/hung_task.c:377
 kthread+0x2e4/0x3a0 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: 32366 Comm: sed Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:native_pud_val arch/x86/include/asm/pgtable_types.h:347 [inline]
RIP: 0010:pud_none arch/x86/include/asm/pgtable.h:829 [inline]
RIP: 0010:pmd_alloc include/linux/mm.h:2211 [inline]
RIP: 0010:__handle_mm_fault+0x4f8/0x39b0 mm/memory.c:5019
Code: 00 48 89 ef 48 8b b4 24 a8 00 00 00 e8 71 cd 15 00 e8 5c 0f c6 ff 48 8b 9c 24 a8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <0f> 85 a9 10 00 00 48 8b 2b 31 ff 49 89 ec 49 83 e4 9f 4c 89 e6 e8
RSP: 0000:ffffc900038cfd18 EFLAGS: 00000246
RAX: 1ffff1100b7759ff RBX: ffff88805bbacff8 RCX: 0000000000000000
RDX: ffff888079002140 RSI: ffffffff81b46754 RDI: 0000000000000007
RBP: 000000001c71d067 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 000000005bbac007
R13: dffffc0000000000 R14: ffff888073a8eb58 R15: 0000000000000040
FS:  00007fdd61e04800(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffff2279c70 CR3: 000000002a299000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 handle_mm_fault+0x1c8/0x780 mm/memory.c:5157
 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1407
 handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1554
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fdd61f7e845
Code: ff 0f 11 28 f3 0f 6f 75 80 0f 11 70 10 48 8b 85 50 ff ff ff 48 8b 40 10 8b 1c 38 bf 04 00 00 00 48 b8 01 00 00 00 01 00 00 00 <49> 89 04 24 e8 ca ea f4 ff 49 89 44 24 08 48 85 c0 0f 84 8a 03 00
RSP: 002b:00007ffff2279c70 EFLAGS: 00010202
RAX: 0000000100000001 RBX: 000000000000000d RCX: 000000000000006e
RDX: 0000000000000008 RSI: 0000400000000000 RDI: 0000000000000004
RBP: 00007ffff227cd80 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000002 R12: 00007ffff2279c70
R13: 00007ffff227ccf0 R14: 00007ffff2279c70 R15: 0000000000000000
 </TASK>