rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4262/1:b..l
	(detected by 0, t=10502 jiffies, g=6461, q=818 ncpus=2)
task:syz-executor.1  state:R  running task     stack:0     pid:4262  ppid:4250   flags:0x00000004
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0xee4/0x1c98 kernel/sched/core.c:6558
 preempt_schedule_irq+0x8c/0x1b8 kernel/sched/core.c:6870
 arm64_preempt_schedule_irq arch/arm64/kernel/entry-common.c:265 [inline]
 __el1_irq arch/arm64/kernel/entry-common.c:474 [inline]
 el1_interrupt+0x4c/0x68 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 lock_release+0x528/0xa50 kernel/locking/lockdep.c:5685
 rcu_lock_release+0x24/0x30 include/linux/rcupdate.h:355
 rcu_read_unlock include/linux/rcupdate.h:824 [inline]
 percpu_ref_tryget_many include/linux/percpu-refcount.h:250 [inline]
 percpu_ref_tryget+0x164/0x2a4 include/linux/percpu-refcount.h:266
 obj_cgroup_tryget include/linux/memcontrol.h:779 [inline]
 __get_obj_cgroup_from_memcg+0x9c/0x108 mm/memcontrol.c:3001
 get_obj_cgroup_from_current+0x2a0/0x540 mm/memcontrol.c:3021
 memcg_slab_pre_alloc_hook mm/slab.h:485 [inline]
 slab_pre_alloc_hook mm/slab.h:715 [inline]
 slab_alloc_node mm/slub.c:3318 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0xac/0x37c mm/slub.c:3422
 kmem_cache_zalloc include/linux/slab.h:682 [inline]
 __alloc_file+0x30/0x22c fs/file_table.c:138
 alloc_empty_file+0xa8/0x198 fs/file_table.c:187
 path_openat+0xd0/0x2548 fs/namei.c:3771
 do_filp_open+0x1bc/0x3cc fs/namei.c:3812
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
rcu: rcu_preempt kthread starved for 10493 jiffies! g6461 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:0     pid:16    ppid:2      flags:0x00000008
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0xee4/0x1c98 kernel/sched/core.c:6558
 schedule+0xc4/0x170 kernel/sched/core.c:6634
 schedule_timeout+0x1d8/0x344 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2cc/0x1538 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xc0/0x308 kernel/rcu/tree.c:1905
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 4639 Comm: syz-executor.0 Not tainted 6.1.92-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : lock_release+0x528/0xa50
lr : lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lr : lock_release+0x4e8/0xa50 kernel/locking/lockdep.c:5684
sp : ffff80001f8b7880
x29: ffff80001f8b7940 x28: ffff0000d3748000 x27: dfff800000000000
x26: 0000000000000000 x25: ffff0000d3748a78 x24: 00000000fff501a6
x23: ffff0000d3748a70 x22: 1fffe0001a6e914e x21: ffffffffffffffff
x20: 0000000000000000 x19: ffff0001b4357cc0 x18: 1fffe0001ac35d94
x17: 0000000000000000 x16: ffff80001215fccc x15: 0000000000000000
x14: 1ffff00002b0a0b0 x13: dfff800000000000 x12: 00000000d8d9fa02
x11: 0000000000ff0100 x10: 0000000000000000 x9 : 0000000000000080
x8 : 0000000000000000 x7 : ffff800008860188 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : ffff8000122bd820 x0 : 0000000000000000
Call trace:
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 lock_release+0x528/0xa50 kernel/locking/lockdep.c:5685
 __might_fault+0xf0/0x124 mm/memory.c:5835
 clear_rseq_cs kernel/rseq.c:228 [inline]
 rseq_ip_fixup kernel/rseq.c:262 [inline]
 __rseq_handle_notify_resume+0x630/0x193c kernel/rseq.c:300
 rseq_handle_notify_resume include/linux/sched.h:2329 [inline]
 rseq_signal_deliver include/linux/sched.h:2338 [inline]
 handle_signal arch/arm64/kernel/signal.c:1005 [inline]
 do_signal arch/arm64/kernel/signal.c:1091 [inline]
 do_notify_resume+0x6d0/0x3474 arch/arm64/kernel/signal.c:1129
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585