rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=a7f/1/0x4000000000000000 softirq=28313/28313 fqs=6 
	(t=10501 jiffies g=38581 q=185)
rcu: rcu_preempt kthread starved for 10490 jiffies! g38581 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27000 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9016 Comm: syz.2.1058 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:send_signal+0x14/0x8c0 kernel/signal.c:1214
Code: 01 00 00 00 5b 41 5e 5d eb 0c 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 30 41 89 ce 49 89 d5 <49> 89 f7 41 89 fc e8 d1 c5 30 00 4c 89 ff 48 c7 c6 80 df 9c 8c e8
RSP: 0018:ffffc90000007d78 EFLAGS: 00000086
RAX: ffffffff814f955e RBX: 0000000000000001 RCX: 0000000000000001
RDX: ffff8880547f8000 RSI: 0000000000000001 RDI: 0000000000000011
RBP: ffffc90000007e98 R08: dffffc0000000000 R09: fffffbfff213181b
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000fc4
R13: ffff8880547f8000 R14: 0000000000000001 R15: 1ffff92000000fc0
FS:  00007f6418e6e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6418e6dd40 CR3: 000000006027a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 do_send_sig_info kernel/signal.c:1294 [inline]
 group_send_sig_info+0x260/0x2d0 kernel/signal.c:1442
 do_bpf_send_signal+0x81/0x150 kernel/trace/bpf_trace.c:779
 irq_work_single kernel/irq_work.c:155 [inline]
 irq_work_run_list+0x20b/0x370 kernel/irq_work.c:177
 irq_work_run+0x63/0xe0 kernel/irq_work.c:186
 __sysvec_irq_work+0x9a/0x250 arch/x86/kernel/irq_work.c:22
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x98/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:212 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:156 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:263 [inline]
RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:208
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 1f 67 fe 02 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900030ffca8 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: ffffffff8c5d1a10 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10171c67a7
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b8e33b10
R13: 1ffff9200061ff00 R14: dffffc0000000000 R15: 0000000000000020
 arch_irq_work_raise+0x82/0xd0 arch/x86/kernel/irq_work.c:31
 irq_work_queue+0xa3/0x150 kernel/irq_work.c:75
 bpf_send_signal_common+0x2e6/0x450 kernel/trace/bpf_trace.c:820
 ____bpf_send_signal kernel/trace/bpf_trace.c:829 [inline]
 bpf_send_signal+0x15/0x20 kernel/trace/bpf_trace.c:827
 bpf_prog_7ba5217f62dcd359+0x38/0x328
 bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
 bpf_trace_run2+0x19e/0x340 kernel/trace/bpf_trace.c:1915
 __bpf_trace_sys_enter+0x60/0x70 include/trace/events/syscalls.h:18
 trace_sys_enter include/trace/events/syscalls.h:18 [inline]
 syscall_trace_enter kernel/entry/common.c:77 [inline]
 __syscall_enter_from_user_work kernel/entry/common.c:96 [inline]
 syscall_enter_from_user_mode+0x202/0x240 kernel/entry/common.c:114
 do_syscall_64+0x1e/0x80 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f641afc3b39
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:00007f6418e6db40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f641b24f088 RCX: 00007f641afc3b39
RDX: 00007f6418e6db40 RSI: 00007f6418e6dc70 RDI: 0000000000000011
RBP: 00007f641b24f080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f641b24f08c
R13: 0000000000000000 R14: 00007ffe43f321e0 R15: 00007ffe43f322c8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 PID: 9007 Comm: syz.9.1059 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 31 60 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ae ec 19 f7 48 89 df e8 06 41 1b f7 e8 b1 f0 3d f7 fb bf 01 00 00 00 <e8> d6 83 0e f7 65 8b 05 b7 a0 b9 75 85 c0 74 02 5b c3 e8 64 bc b7
RSP: 0018:ffffc90002d5fbc0 EFLAGS: 00000282
RAX: 25317a43d8080f00 RBX: ffff88802b8eef00 RCX: ffffffff96a92f03
RDX: dffffc0000000000 RSI: ffffffff8aab18e0 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8186bfe0 R09: ffffed100571dde1
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000011
R13: dffffc0000000000 R14: ffff88802b8ef198 R15: ffff88802b8eef00
 spin_unlock_irq include/linux/spinlock.h:413 [inline]
 get_signal+0x13ee/0x14e0 kernel/signal.c:2903
 arch_do_signal_or_restart+0xbd/0x12b0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0x80 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f36b4e30969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36b2c98038 EFLAGS: 00000246
RAX: ffffffffffffffea RBX: 00007f36b5057fa0 RCX: 00007f36b4e30969
RDX: 0000200000000200 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 00007f36b4eb2ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36b5057fa0 R15: 00007ffd3d5714c8
 </TASK>