rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=66ac/1/0x4000000000000000 softirq=11891/11891 fqs=3
	(t=10500 jiffies g=11429 q=464 ncpus=2)
rcu: rcu_preempt kthread starved for 10494 jiffies! g11429 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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+0x2f4/0x568 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0xdd4/0x1b2c kernel/sched/core.c:6561
 schedule+0xc4/0x170 kernel/sched/core.c:6637
 schedule_timeout+0x180/0x2c8 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2a8/0x134c kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xc0/0x2f8 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:
Task dump for CPU 1:
task:syz.1.17        state:R  running task     stack:0     pid:5340  ppid:5150   flags:0x00000000
Call trace:
 __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555
 0xfffff00002a0e0b1
CPU: 0 PID: 5338 Comm: syz.3.19 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : lock_release+0x20/0x910 kernel/locking/lockdep.c:5670
lr : __might_fault+0xf0/0x124 mm/memory.c:5852
sp : ffff800020ca7600
x29: ffff800020ca76a0 x28: 0000000000000000 x27: ffff700004194ef0
x26: 0000000000001000 x25: ffff800011a26400 x24: 0000000000000001
x23: ffff0000d8ff9bc0 x22: dfff800000000000 x21: 0000000000000000
x20: 1fffe0001b1ff414 x19: ffff0000d8ffa0a0 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082d0750 x15: 0000ffffbae12908
x14: 0000000000000000 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100
x11: ff008000087d2544 x10: 0000000000000000 x9 : ffff8000087d2544
x8 : ffff0000d75d4200 x7 : ffff8000087d2514 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : ffff8000087d253c x0 : ffff0000d75d4348
Call trace:
 lock_release+0x20/0x910 kernel/locking/lockdep.c:5670
 parse_user_sigframe arch/arm64/kernel/signal.c:498 [inline]
 restore_sigframe arch/arm64/kernel/signal.c:662 [inline]
 __arm64_sys_rt_sigreturn+0x710/0x1e00 arch/arm64/kernel/signal.c:700
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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