rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=c0f/1/0x4000000000000000 softirq=7346/7350 fqs=5248 
	(t=10502 jiffies g=7969 q=6132)
NMI backtrace for cpu 1
CPU: 1 PID: 4450 Comm: syz.4.61 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x320/0x600 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619
 update_process_times+0x196/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:restore_sigcontext+0x186/0x710 arch/x86/kernel/signal.c:103
Code: 89 f8 48 c1 e8 03 42 80 3c 30 00 74 05 e8 62 0d 9e 00 4c 8b a4 24 c0 00 00 00 49 8d 5d 60 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 c0 0d 9e 00 4c 89 23 49 8d 7f 48 48 89 f8 48 c1
RSP: 0018:ffffc9000309fc60 EFLAGS: 00000246
RAX: 1ffff92000613ff7 RBX: ffffc9000309ffb8 RCX: 0000000000000000
RDX: ffffc9000d062000 RSI: 000000000007ffff RDI: ffffc9000309fd20
RBP: ffffc9000309fe50 R08: ffffffff841432e5 R09: fffff52000613fb0
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffc9000309ff58 R14: dffffc0000000000 R15: ffffc9000309fcc0
 __do_sys_rt_sigreturn+0x190/0x250 arch/x86/kernel/signal.c:674
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f26c5e6f359
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007f26c3d3ab40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f26c60fafa8 RCX: 00007f26c5ed3169
RDX: 00007f26c3d3ab40 RSI: 00007f26c3d3ac70 RDI: 0000000000000011
RBP: 00007f26c60fafa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f26c60fafac
R13: 0000000000000000 R14: 00007ffd006bafc0 R15: 00007ffd006bb0a8
 </TASK>