rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10501 ticks this GP) idle=3bb/1/0x4000000000000000 softirq=7068/7068 fqs=0 
	(t=10502 jiffies g=7201 q=210)
rcu: rcu_preempt kthread starved for 10503 jiffies! g7201 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:1884
 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:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 4350 Comm: syz-executor.1 Not tainted 5.15.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb 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_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
 print_cpu_stall+0x31b/0x600 kernel/rcu/tree_stall.h:631
 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:1788
 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:1685 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:rcu_read_unlock_bh include/linux/rcupdate.h:764 [inline]
RIP: 0010:ip6_finish_output2+0x102d/0x14f0 net/ipv6/ip6_output.c:127
Code: ea ff ff ff eb 35 e8 f2 aa 89 f8 c6 05 ba c5 d9 04 01 48 c7 c7 20 20 86 8b be fb 02 00 00 48 c7 c2 40 21 86 8b e8 43 60 6c f8 <48> c7 c7 40 f1 91 8c e8 37 0c 00 00 e8 52 0c 00 00 48 c7 84 24 80
RSP: 0018:ffffc90000dd0780 EFLAGS: 00000246
RAX: ffffffff88f679dd RBX: 0000000000000001 RCX: ffff888029769dc0
RDX: 0000000000000302 RSI: ffffffff8ad87da0 RDI: ffffffff8ad87d60
RBP: ffffc90000dd08b0 R08: ffffffff88f679cb R09: fffffbfff1f79e38
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba100
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff11002ddf4e2
 dst_output include/net/dst.h:443 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:509
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3942
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1737
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 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:local_lock_release+0x2/0x170 include/linux/local_lock_internal.h:35
Code: 0b e8 32 36 d4 ff 48 ff cd 48 89 ef 48 c7 c6 20 29 93 8a e8 60 66 0a 00 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 <41> 56 53 49 89 fe e8 03 36 d4 ff 48 c7 c0 c0 6f 3c 91 48 c1 e8 03
RSP: 0018:ffffc900065e77f0 EFLAGS: 00000282
RAX: 1ffffffff1869aff RBX: ffffffff8c34d7f8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b9b348d0
RBP: 0000000000000001 R08: ffffffff81ac138b R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8880b9b34900
R13: 000000000000000c R14: ffffea0000a8b980 R15: ffffea0000a8b988
 lru_cache_add+0x5af/0x7e0 mm/swap.c:454
 wp_page_copy+0xec3/0x2070 mm/memory.c:3087
 handle_pte_fault mm/memory.c:4639 [inline]
 __handle_mm_fault mm/memory.c:4756 [inline]
 handle_mm_fault+0x2a3d/0x5950 mm/memory.c:4854
 do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:__put_user_nocheck_8+0x3/0x21
Code: 00 00 48 39 d9 73 34 0f 01 cb 89 01 31 c9 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f 00 00 48 39 d9 73 14 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 0f 01 ca b9 f2 ff ff ff
RSP: 0000:ffffc900065e7db8 EFLAGS: 00050293
RAX: 0000000000000000 RBX: 00007fffffffeff9 RCX: 00007f362dc30fe8
RDX: 0000000000000000 RSI: ffffffff8a8b2000 RDI: ffffffff8ad87dc0
RBP: ffffc900065e7f00 R08: dffffc0000000000 R09: fffffbfff1bc72d6
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900065e7e68
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000cbcfce
 clear_rseq_cs kernel/rseq.c:220 [inline]
 rseq_ip_fixup kernel/rseq.c:254 [inline]
 __rseq_handle_notify_resume+0x605/0x1250 kernel/rseq.c:292
 rseq_handle_notify_resume include/linux/sched.h:2208 [inline]
 tracehook_notify_resume include/linux/tracehook.h:201 [inline]
 exit_to_user_mode_loop+0xdc/0x130 kernel/entry/common.c:175
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
 irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:314
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x7f362f6f0ba9
Code: 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 01 48
RSP: 002b:00007f362dc300c8 EFLAGS: 00000246
RAX: fffffffffffffffe RBX: 00007f362f810120 RCX: 00007f362f6f0ba9
RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000500
RBP: 00007f362f73c47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f362f810120 R15: 00007fffafcc71e8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 PID: 4350 Comm: syz-executor.1 Not tainted 5.15.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb 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:1788
 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:1685 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:rcu_read_unlock_bh include/linux/rcupdate.h:764 [inline]
RIP: 0010:ip6_finish_output2+0x102d/0x14f0 net/ipv6/ip6_output.c:127
Code: ea ff ff ff eb 35 e8 f2 aa 89 f8 c6 05 ba c5 d9 04 01 48 c7 c7 20 20 86 8b be fb 02 00 00 48 c7 c2 40 21 86 8b e8 43 60 6c f8 <48> c7 c7 40 f1 91 8c e8 37 0c 00 00 e8 52 0c 00 00 48 c7 84 24 80
RSP: 0018:ffffc90000dd0780 EFLAGS: 00000246
RAX: ffffffff88f679dd RBX: 0000000000000001 RCX: ffff888029769dc0
RDX: 0000000000000302 RSI: ffffffff8ad87da0 RDI: ffffffff8ad87d60
RBP: ffffc90000dd08b0 R08: ffffffff88f679cb R09: fffffbfff1f79e38
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba100
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff11002ddf4e2
 dst_output include/net/dst.h:443 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:509
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3942
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1737
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 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:local_lock_release+0x2/0x170 include/linux/local_lock_internal.h:35
Code: 0b e8 32 36 d4 ff 48 ff cd 48 89 ef 48 c7 c6 20 29 93 8a e8 60 66 0a 00 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 <41> 56 53 49 89 fe e8 03 36 d4 ff 48 c7 c0 c0 6f 3c 91 48 c1 e8 03
RSP: 0018:ffffc900065e77f0 EFLAGS: 00000282
RAX: 1ffffffff1869aff RBX: ffffffff8c34d7f8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b9b348d0
RBP: 0000000000000001 R08: ffffffff81ac138b R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8880b9b34900
R13: 000000000000000c R14: ffffea0000a8b980 R15: ffffea0000a8b988
 lru_cache_add+0x5af/0x7e0 mm/swap.c:454
 wp_page_copy+0xec3/0x2070 mm/memory.c:3087
 handle_pte_fault mm/memory.c:4639 [inline]
 __handle_mm_fault mm/memory.c:4756 [inline]
 handle_mm_fault+0x2a3d/0x5950 mm/memory.c:4854
 do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:__put_user_nocheck_8+0x3/0x21
Code: 00 00 48 39 d9 73 34 0f 01 cb 89 01 31 c9 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f 00 00 48 39 d9 73 14 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 0f 01 ca b9 f2 ff ff ff
RSP: 0000:ffffc900065e7db8 EFLAGS: 00050293
RAX: 0000000000000000 RBX: 00007fffffffeff9 RCX: 00007f362dc30fe8
RDX: 0000000000000000 RSI: ffffffff8a8b2000 RDI: ffffffff8ad87dc0
RBP: ffffc900065e7f00 R08: dffffc0000000000 R09: fffffbfff1bc72d6
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900065e7e68
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000cbcfce
 clear_rseq_cs kernel/rseq.c:220 [inline]
 rseq_ip_fixup kernel/rseq.c:254 [inline]
 __rseq_handle_notify_resume+0x605/0x1250 kernel/rseq.c:292
 rseq_handle_notify_resume include/linux/sched.h:2208 [inline]
 tracehook_notify_resume include/linux/tracehook.h:201 [inline]
 exit_to_user_mode_loop+0xdc/0x130 kernel/entry/common.c:175
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
 irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:314
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x7f362f6f0ba9
Code: 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 01 48
RSP: 002b:00007f362dc300c8 EFLAGS: 00000246
RAX: fffffffffffffffe RBX: 00007f362f810120 RCX: 00007f362f6f0ba9
RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000500
RBP: 00007f362f73c47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f362f810120 R15: 00007fffafcc71e8
 </TASK>