rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=761/1/0x4000000000000000 softirq=10307/10313 fqs=4189 
	(t=10500 jiffies g=12801 q=26901)
NMI backtrace for cpu 1
CPU: 1 PID: 5145 Comm: syz.0.43 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <IRQ>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x22f/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31d/0x5f0 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x6d8/0x1110 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4fe/0xc40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:clear_restore_sigmask include/linux/sched/signal.h:493 [inline]
RIP: 0010:signal_delivered kernel/signal.c:2931 [inline]
RIP: 0010:signal_setup_done+0x114/0x440 kernel/signal.c:2947
Code: 98 00 00 00 80 00 00 00 65 48 8b 35 e6 82 b7 7e 48 89 df ba 01 00 00 00 e8 99 56 ff ff e9 2d 02 00 00 41 89 de 4c 89 6c 24 10 <65> 4c 8b 2d c4 82 b7 7e 49 8d bd 80 05 00 00 48 89 f8 48 c1 e8 03
RSP: 0018:ffffc9000110fb60 EFLAGS: 00000246
RAX: ffffffff814aec69 RBX: 0000000000000000 RCX: ffff888029bc1dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000110fcb0 R08: dffffc0000000000 R09: ffffed1027fd3e41
R10: ffffed1027fd3e41 R11: 1ffff11027fd3e40 R12: dffffc0000000000
R13: 1ffff92000221f70 R14: 0000000000000000 R15: ffffc9000110fde0
 handle_signal arch/x86/kernel/signal.c:842 [inline]
 arch_do_signal_or_restart+0xf2e/0x1300 arch/x86/kernel/signal.c:869
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f188432e9b0
Code: 44 24 20 0f 29 44 24 30 0f 29 44 24 40 48 8b 44 24 08 ff d0 48 83 c4 50 31 c0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 80 00 00 00 00 <c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 c3 66 66 2e 0f 1f
RSP: 002b:00007f1883adeb38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f1884696fa8 RCX: 00007f188446fbe9
RDX: 00007f1883adeb40 RSI: 00007f1883adec70 RDI: 0000000000000011
RBP: 00007f1884696fa0 R08: 00340ab6dabb12b0 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1884697038 R14: 00007ffe224a5820 R15: 00007ffe224a5908
 </TASK>