rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=27725, q=18 ncpus=1)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294985687-4294975185), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g27725 f0x2 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+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5257 [inline]
 __schedule+0xdb4/0x1aa4 kernel/sched/core.c:6584
 schedule+0xc4/0x170 kernel/sched/core.c:6660
 schedule_timeout+0x194/0x2f4 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x2b0/0x15f4 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xac/0x330 kernel/rcu/tree.c:1905
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 9891 Comm: syz.4.1538 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026
pstate: a2400005 (NzCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __memcpy+0x134/0x250 arch/arm64/lib/memcpy.S:164
lr : memcpy+0x74/0x90 mm/kasan/shadow.c:69
sp : ffff800022cd7640
x29: ffff800022cd7640 x28: 1ffff0000459aff5 x27: ffff800022cd7fa8
x26: 1fffe000192f4000 x25: 0000000000000010 x24: 0000000000000010
x23: ffff8000163340b0 x22: ffff80000802fd54 x21: ffff0000c97a1710
x20: ffff800022cd7a30 x19: 0000000000000210 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800011ba16d0 x15: 0000000000000000
x14: 0000000000000000 x13: 2525252525252525 x12: 2525252525252525
x11: 0000000000000000 x10: ffffffffffffff00 x9 : 0000ffff835d6580
x8 : 0000ffff835d65c0 x7 : 657461636f6c6c61 x6 : 0000000000000075
x5 : ffff0000c97a1920 x4 : ffff800022cd7c40 x3 : ffff0000c97a1710
x2 : 0000000000000210 x1 : ffff800022cd7a30 x0 : ffff0000c97a1710
Call trace:
 __memcpy+0x134/0x250 arch/arm64/lib/memcpy.S:163
 fpsimd_update_current_state+0x9c/0x378 arch/arm64/kernel/fpsimd.c:1785
 restore_sve_fpsimd_context arch/arm64/kernel/signal.c:374 [inline]
 restore_sigframe arch/arm64/kernel/signal.c:698 [inline]
 __arm64_sys_rt_sigreturn+0x195c/0x1f7c arch/arm64/kernel/signal.c:729
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x12c 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:589