rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=341521, q=478 ncpus=1)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295111972-4295101470), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g341521 f0x0 RCU_GP_ONOFF(3) ->state=R ->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:27848 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7270
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7592
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_gp_init+0x864/0x1460 kernel/rcu/tree.c:1980
Code: 00 00 4d 85 e4 0f 85 ad fb ff ff 48 89 ef e8 b3 1b ff ff e9 a0 fb ff ff 8b 3d 18 28 a9 19 e8 d3 6f ff ff 48 63 1d 40 81 54 0f <41> ba 04 00 00 00 66 44 89 15 68 fa ee 0c 48 83 fb 02 0f 83 31 0b
RSP: 0018:ffffc90000167cb8 EFLAGS: 00000246
RAX: ffffffff8edf7d00 RBX: 0000000000000001 RCX: ffffffff8edf7d68
RDX: 0000000000000000 RSI: ffffffff8e3eb977 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8edf7dba R14: 0000000000000001 R15: dffffc0000000000
 rcu_gp_kthread+0xb0/0x220 kernel/rcu/tree.c:2320
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 25846 Comm: syz.8.6577 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:23 [inline]
RIP: 0010:fpu__alloc_mathframe+0x1c/0x140 arch/x86/kernel/fpu/signal.c:498
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 41 56 41 89 f6 41 55 49 89 d5 41 54 49 89 cc 55 53 48 89 fb 48 83 ec 08 <e8> 4f 1b 5c 00 65 48 8b 3d 4f 3b dc 12 e8 52 77 ff ff 48 ba 00 00
RSP: 0018:ffffc900051d7ba0 EFLAGS: 00000286
RAX: ffffc900051d7ca0 RBX: 00007f6d0a339068 RCX: ffffc900051d7c40
RDX: ffffc900051d7c60 RSI: 0000000000000000 RDI: 00007f6d0a339068
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900051d7c40
R13: ffffc900051d7c60 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f6d0a3396c0(0000) GS:ffff888123b5f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69e4deb840 CR3: 0000000055813000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 get_sigframe+0x322/0x940 arch/x86/kernel/signal.c:132
 x64_setup_rt_frame+0x12f/0xce0 arch/x86/kernel/signal_64.c:175
 setup_rt_frame arch/x86/kernel/signal.c:250 [inline]
 handle_signal arch/x86/kernel/signal.c:294 [inline]
 arch_do_signal_or_restart+0x5ee/0x7e0 arch/x86/kernel/signal.c:339
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x139/0x700 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
 do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6d0939e157
Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 <0f> 05 48 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89
RSP: 002b:00007f6d0a3390e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f6d09625fa8 RCX: 00007f6d0939e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6d09625fa8
RBP: 00007f6d09625fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d09626038 R14: 00007ffcb4cb7e90 R15: 00007ffcb4cb7f78
 </TASK>