rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	0-...!: (10000 ticks this GP) idle=301/1/0x4000000000000000 softirq=6616/6625 fqs=1 
	(t=10002 jiffies g=1337 q=841)
rcu: rcu_sched kthread starved for 10001 jiffies! g1337 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_sched       state:R  running task     stack:14368 pid:   12 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x2b8/0x790 kernel/sched/core.c:6376
 schedule+0x53/0x90 kernel/sched/core.c:6459
 schedule_timeout+0xaf/0x140 kernel/time/timer.c:1884
 rcu_gp_fqs_loop+0xe2/0x320 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x77/0xe0 kernel/rcu/tree.c:2145
 kthread+0x10b/0x130 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3935 Comm: syz-executor.4 Not tainted 5.15.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:xsave_to_user_sigframe arch/x86/include/asm/fpu/internal.h:351 [inline]
RIP: 0010:copy_fpregs_to_sigframe arch/x86/kernel/fpu/signal.c:141 [inline]
RIP: 0010:copy_fpstate_to_sigframe+0xa5/0x2c0 arch/x86/kernel/fpu/signal.c:203
Code: 02 00 00 be 40 00 00 00 e8 68 07 61 00 48 89 c2 81 e3 ff 02 00 00 85 c0 0f 85 56 01 00 00 0f 01 cb 48 89 ef 89 d8 48 0f ae 27 <31> c0 89 c3 0f 01 ca 85 db 75 5f 41 83 ad e8 15 00 00 01 be 00 02
RSP: 0018:ffffc90000ee3e08 EFLAGS: 00040246
RAX: 0000000000000007 RBX: 0000000000000007 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 00007f80559aed80
RBP: 00007f80559aed80 R08: 0000000000000020 R09: 0000000000000001
R10: 0000000000000021 R11: ffff8881700c1b00 R12: ffff8881700c1b00
R13: ffff8881700c1b00 R14: ffff8881700c1b00 R15: ffffffff83035e80
FS:  00007f80559af6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f80559aed80 CR3: 00000001701b4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 get_sigframe arch/x86/kernel/signal.c:295 [inline]
 __setup_rt_frame arch/x86/kernel/signal.c:471 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:780 [inline]
 handle_signal arch/x86/kernel/signal.c:824 [inline]
 arch_do_signal_or_restart+0x61d/0x710 arch/x86/kernel/signal.c:869
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0xef/0x160 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x12/0x30 kernel/entry/common.c:301
 do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f8055e2cae7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007f80559af178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f8055f4bf88 RCX: 00007f8055e2cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8055f4bf88
RBP: 00007f8055f4bf80 R08: 00007f80559af6c0 R09: 00007f80559af6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8055f4bf8c
R13: 0000000000000006 R14: 00007ffe71489cc0 R15: 00007ffe71489da8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 3923 Comm: syz-executor.5 Not tainted 5.15.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x41/0x5e lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x32/0x80 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x81/0x90 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0xa5/0xd3 kernel/rcu/tree_stall.h:349
 print_cpu_stall kernel/rcu/tree_stall.h:633 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq.cold+0xc7/0x1e7 kernel/rcu/tree.c:2619
 update_process_times+0x87/0xc0 kernel/time/timer.c:1788
 tick_sched_handle+0x1d/0x50 kernel/time/tick-sched.c:254
 tick_sched_timer+0x5c/0x70 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x138/0x2e0 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x109/0x230 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x63/0x100 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x65/0x90 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:_raw_spin_unlock_irq+0x1c/0x20 kernel/locking/spinlock.c:203
Code: 00 00 5d e9 b6 c4 09 ff 66 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 0e d8 0e ff 48 89 ef e8 06 fd 0e ff fb 5d <c3> 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8
RSP: 0018:ffffc90000ed3de8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffc90000ed3e70 RCX: ffffc90000ed3da4
RDX: 0000000000000000 RSI: ffff88810a2888d8 RDI: ffff88810a2888c0
RBP: ffff8881700f9b00 R08: 0000000000000020 R09: 0000000000000401
R10: 0000000000000021 R11: ffff8881700f9b00 R12: ffff88810a2ac800
R13: ffff8881700f9b00 R14: ffff88810a2888c0 R15: ffffc90000ed3e90
 spin_unlock_irq include/linux/spinlock.h:413 [inline]
 get_signal+0x7f3/0xa40 kernel/signal.c:2892
 arch_do_signal_or_restart+0xf8/0x710 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0xef/0x160 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x12/0x30 kernel/entry/common.c:301
 do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fdf1358eae7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007fdf13111178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fdf136adf88 RCX: 00007fdf1358eae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fdf136adf88
RBP: 00007fdf136adf80 R08: 00007fdf131116c0 R09: 00007fdf131116c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdf136adf8c
R13: 0000000000000006 R14: 00007ffdef651410 R15: 00007ffdef6514f8
 </TASK>