INFO: task syz-executor:6004 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:20608 pid:6004  tgid:6004  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:240
 __wait_on_bit+0xb6/0x310 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x123/0x170 kernel/sched/wait_bit.c:67
 wait_on_bit include/linux/wait_bit.h:77 [inline]
 gfs2_glock_wait+0xbd/0x2a0 fs/gfs2/glock.c:1335
 gfs2_glock_nq_init fs/gfs2/glock.h:252 [inline]
 __gfs2_lookup+0x117/0x270 fs/gfs2/inode.c:984
 __lookup_slow+0x297/0x3d0 fs/namei.c:1808
 lookup_slow+0x53/0x70 fs/namei.c:1825
 walk_component+0x2d2/0x400 fs/namei.c:2129
 lookup_last fs/namei.c:2630 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2654
 filename_lookup+0x212/0x570 fs/namei.c:2683
 user_path_at+0x3a/0x60 fs/namei.c:3127
 ksys_umount fs/namespace.c:2112 [inline]
 __do_sys_umount fs/namespace.c:2120 [inline]
 __se_sys_umount fs/namespace.c:2118 [inline]
 __x64_sys_umount+0xee/0x160 fs/namespace.c:2118
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe668d8ff17
RSP: 002b:00007ffee9782348 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007fe668e11c05 RCX: 00007fe668d8ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffee9782400
RBP: 00007ffee9782400 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffee97834f0
R13: 00007fe668e11c05 R14: 000000000003099f R15: 00007ffee97856b0
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
 watchdog+0xf60/0xfa0 kernel/hung_task.c:495
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:hrtimer_start_range_ns+0x44/0x1080 kernel/time/hrtimer.c:1323
Code: 54 24 48 48 89 74 24 20 49 89 fd 49 bc 00 00 00 00 00 fc ff df e8 5c 29 12 00 49 8d 5d 3a 48 89 d8 48 c1 e8 03 42 0f b6 04 20 <84> c0 0f 85 05 0e 00 00 0f b6 33 85 f6 0f 94 c3 31 ff e8 35 2c 12
RSP: 0018:ffffc90000197c58 EFLAGS: 00000802
RAX: 0000000000000000 RBX: ffff8880b872841a RCX: ffff88801d69da00
RDX: 0000000000000000 RSI: 00000051e2f41d00 RDI: ffff8880b87283e0
RBP: 1ffff110170e507f R08: ffff8880b8727a83 R09: 1ffff110170e4f50
R10: dffffc0000000000 R11: ffffed10170e4f51 R12: dffffc0000000000
R13: ffff8880b87283e0 R14: 000000000000000a R15: ffff8880b87283f8
FS:  0000000000000000(0000) GS:ffff888125aff000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000028000 CR3: 0000000033c2e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hrtimer_start_expires include/linux/hrtimer.h:277 [inline]
 tick_nohz_restart kernel/time/tick-sched.c:845 [inline]
 tick_nohz_restart_sched_tick+0x1f0/0x260 kernel/time/tick-sched.c:1103
 tick_nohz_idle_update_tick kernel/time/tick-sched.c:1427 [inline]
 tick_nohz_idle_exit+0x266/0x470 kernel/time/tick-sched.c:1470
 do_idle+0x49e/0x510 kernel/sched/idle.c:343
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x147
 </TASK>