rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8191/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=31873, q=510 ncpus=2)
task:syz-executor.2  state:R  running task     stack:22640 pid:8191  tgid:8187  ppid:5115   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rht_ptr_rcu include/linux/rhashtable.h:376 [inline]
RIP: 0010:__rhashtable_walk_find_next+0x204/0x940 lib/rhashtable.c:809
Code: e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 52 6b 4d fd 49 8b 6d 00 e8 d9 75 d7 06 89 c3 31 ff 89 c6 e8 4e c2 e7 fc 85 db <74> 1f e8 35 98 cc fc 89 c3 31 ff 89 c6 e8 3a c2 e7 fc 85 db 0f 84
RSP: 0018:ffffc90002d8f6e8 EFLAGS: 00000202
RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffff888021933c00
RDX: ffff888021933c00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff84ae6782 R09: 1ffff1100a88c004
R10: dffffc0000000000 R11: ffffed100a88c005 R12: dffffc0000000000
R13: ffff88801bf0fc20 R14: 0000000000000000 R15: ffffc90002d8f7e0
 glock_hash_walk+0x102/0x1b0 fs/gfs2/glock.c:2140
 gfs2_gl_hash_clear+0xbb/0x470 fs/gfs2/glock.c:2264
 gfs2_fill_super+0x1dd2/0x2740 fs/gfs2/ops_fstype.c:1297
 get_tree_bdev+0x3f9/0x570 fs/super.c:1615
 gfs2_get_tree+0x54/0x220 fs/gfs2/ops_fstype.c:1322
 vfs_get_tree+0x92/0x2a0 fs/super.c:1780
 do_new_mount+0x2be/0xb40 fs/namespace.c:3352
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
 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: 0033:0x7ff2ae87e7aa
RSP: 002b:00007ff2af616ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff2af616f80 RCX: 00007ff2ae87e7aa
RDX: 00000000200124c0 RSI: 0000000020012500 RDI: 00007ff2af616f40
RBP: 00000000200124c0 R08: 00007ff2af616f80 R09: 0000000000000800
R10: 0000000000000800 R11: 0000000000000202 R12: 0000000020012500
R13: 00007ff2af616f40 R14: 00000000000124ab R15: 0000000020000240
 </TASK>
rcu: rcu_preempt kthread starved for 9346 jiffies! g31873 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:24912 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112