rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=9117, q=203 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10494 (4294956151-4294945657), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10495 jiffies! g9117 f0x2 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:27160 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 5813 Comm: syz-executor163 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:fpu__clear_user_states+0x0/0x270 arch/x86/kernel/fpu/core.c:742
Code: 77 54 00 e8 92 88 cf ff e9 4a fd ff ff e8 58 77 54 00 0f 0b e9 f1 fe ff ff e8 4c 77 54 00 e8 77 88 cf ff e9 ae fc ff ff 66 90 <66> 0f 1f 00 55 41 57 41 56 41 55 41 54 53 49 89 fc e8 2a 77 54 00
RSP: 0018:ffffc9000472fd98 EFLAGS: 00000202
RAX: 1ffff920008e5ffd RBX: 1ffff920008e5fb8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88802a471940
RBP: ffffc9000472fec0 R08: ffffffff8e4a82ef R09: 1ffffffff1c9505d
R10: dffffc0000000000 R11: fffffbfff1c9505e R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000472ffe8 R15: ffff88802a471940
FS:  00005555705fd3c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fedfa1624c0 CR3: 000000002b6be000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 handle_signal arch/x86/kernel/signal.c:283 [inline]
 arch_do_signal_or_restart+0x477/0x780 arch/x86/kernel/signal.c:312
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fedfa170bb0
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 1a b6 02 00 e8 d5 dd fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007ffd48b5d878 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fedfa14ab09
RDX: 00007ffd48b5d880 RSI: 00007ffd48b5d9b0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007ffd48b5de50 R09: 00007ffd48b5de50
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fedfa1cc488
R13: 00007ffd48b5de3c R14: 0000000000000000 R15: 431bde82d7b634db
 </TASK>