INFO: task syz-executor:5369 blocked for more than 144 seconds.
      Not tainted 6.10.0-rc7-next-20240712-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21680 pid:5369  tgid:5369  ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 bit_wait+0x12/0xd0 kernel/sched/wait_bit.c:199
 __wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64
 wait_on_bit include/linux/wait_bit.h:76 [inline]
 gfs2_glock_wait+0xc7/0x2b0 fs/gfs2/glock.c:1363
 gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline]
 __gfs2_lookup+0x11b/0x280 fs/gfs2/inode.c:905
 __lookup_slow+0x28c/0x3f0 fs/namei.c:1718
 lookup_slow+0x53/0x70 fs/namei.c:1735
 walk_component+0x2e1/0x410 fs/namei.c:2030
 lookup_last fs/namei.c:2499 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2523
 filename_lookup+0x256/0x610 fs/namei.c:2552
 user_path_at+0x3a/0x60 fs/namei.c:2959
 ksys_umount fs/namespace.c:2032 [inline]
 __do_sys_umount fs/namespace.c:2040 [inline]
 __se_sys_umount fs/namespace.c:2038 [inline]
 __x64_sys_umount+0xf1/0x170 fs/namespace.c:2038
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f557e776f07
RSP: 002b:00007fffc8f9cc18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f557e7e3515 RCX: 00007f557e776f07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffc8f9ccd0
RBP: 00007fffc8f9ccd0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffc8f9ddc0
R13: 00007f557e7e3515 R14: 000000000003474c R15: 0000000000034255
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc7-next-20240712-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfee/0x1030 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2415 Comm: kworker/u8:7 Not tainted 6.10.0-rc7-next-20240712-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:mm_has_notifiers include/linux/mmu_notifier.h:273 [inline]
RIP: 0010:mmu_notifier_invalidate_range_end include/linux/mmu_notifier.h:471 [inline]
RIP: 0010:page_vma_mkclean_one+0x87c/0x9a0 mm/rmap.c:1059
Code: 28 00 74 0d 48 8d bc 24 00 01 00 00 e8 ad e1 11 00 bb e8 07 00 00 48 03 9c 24 00 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 8a e1 11 00 48 83 3b 00 74 14 e8 3f 5b aa ff 48
RSP: 0018:ffffc90009296200 EFLAGS: 00000246
RAX: 1ffff1100e51c94d RBX: ffff8880728e4a68 RCX: ffff888029c1da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900092963b0 R08: ffffffff81e96f43 R09: 1ffff1100e511078
R10: dffffc0000000000 R11: ffffed100e511079 R12: 000000110c43e000
R13: dffffc0000000000 R14: ffff8880728e4a68 R15: ffffc90009296400
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff61208e440 CR3: 000000002f24c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 page_mkclean_one+0x280/0x420 mm/rmap.c:1070
 rmap_walk_file+0x52f/0x9f0 mm/rmap.c:2686
 rmap_walk mm/rmap.c:2704 [inline]
 folio_mkclean+0x262/0x440 mm/rmap.c:1102
 folio_clear_dirty_for_io+0x22b/0xcf0 mm/page-writeback.c:3024
 mpage_submit_folio+0x88/0x230 fs/ext4/inode.c:1924
 mpage_process_page_bufs+0x6c9/0x8d0 fs/ext4/inode.c:2056
 mpage_prepare_extent_to_map+0xec7/0x1c80 fs/ext4/inode.c:2564
 ext4_do_writepages+0xc52/0x3d40 fs/ext4/inode.c:2706
 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2842
 do_writepages+0x35d/0x870 mm/page-writeback.c:2683
 __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1651
 writeback_sb_inodes+0x99c/0x1380 fs/fs-writeback.c:1947
 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2018
 wb_writeback+0x495/0xd40 fs/fs-writeback.c:2129
 wb_check_old_data_flush fs/fs-writeback.c:2233 [inline]
 wb_do_writeback fs/fs-writeback.c:2286 [inline]
 wb_workfn+0xba1/0x1090 fs/fs-writeback.c:2314
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>