rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10448 ticks this GP) idle=830c/1/0x4000000000000000 softirq=40379/40424 fqs=110
rcu: 	(t=10500 jiffies g=47817 q=742 ncpus=2)
rcu: rcu_preempt kthread starved for 7547 jiffies! g47817 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:26824 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 10723 Comm: syz.9.1155 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:filter_irq_stacks+0x0/0x90 kernel/stacktrace.c:394
Code: 5f 5d c3 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 76 ff ff ff 4c 89 f7 e8 5e 86 68 00 e9 69 ff ff ff e8 14 fe f2 08 0f 1f 40 00 <f3> 0f 1e fa 41 57 41 56 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89
RSP: 0018:ffffc90000007140 EFLAGS: 00000286
RAX: 0000000000000023 RBX: ffffc900000071a0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000023 RDI: ffffc900000071a0
RBP: 0000000000000000 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: dffffc0000000000
R13: 1ffff92000000e90 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f0b288b86c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005596b8865088 CR3: 0000000045130000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __stack_depot_save+0x1f/0x630 lib/stackdepot.c:377
 kasan_save_stack+0x4d/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
 __call_rcu_common kernel/rcu/tree.c:2721 [inline]
 call_rcu+0x158/0x930 kernel/rcu/tree.c:2837
 refdst_drop include/net/dst.h:270 [inline]
 skb_dst_drop include/net/dst.h:282 [inline]
 __dev_queue_xmit+0x90b/0x35a0 net/core/dev.c:4380
 dev_queue_xmit include/linux/netdevice.h:3113 [inline]
 neigh_hh_output include/net/neighbour.h:527 [inline]
 neigh_output include/net/neighbour.h:541 [inline]
 ip6_finish_output2+0xdf5/0x1650 net/ipv6/ip6_output.c:141
 dst_output include/net/dst.h:467 [inline]
 NF_HOOK include/linux/netfilter.h:304 [inline]
 ndisc_send_skb+0xbed/0x14b0 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4006
 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x52d/0x7d0 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:debug_objects_fill_pool+0xe4/0x6b0 lib/debugobjects.c:619
Code: e0 45 43 c7 04 2f 00 00 00 00 43 c7 44 2f 14 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 00 01 00 00 0f 85 bf 05 00 00 <48> 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 89 5c 24 20 eb 11
RSP: 0018:ffffc900045bf020 EFLAGS: 00000246
RAX: 409f0e410230c000 RBX: ffffffff842636a3 RCX: 409f0e410230c000
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: ffffc900045bf170 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: dffffc0000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff920008b7e0c
 debug_object_activate+0x36/0x4b0 lib/debugobjects.c:705
 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline]
 __call_rcu_common kernel/rcu/tree.c:2706 [inline]
 call_rcu+0xab/0x930 kernel/rcu/tree.c:2837
 thread_stack_delayed_free kernel/fork.c:231 [inline]
 free_thread_stack kernel/fork.c:337 [inline]
 release_task_stack kernel/fork.c:590 [inline]
 put_task_stack+0x147/0x200 kernel/fork.c:597
 finish_task_switch+0x442/0x920 kernel/sched/core.c:5287
 context_switch kernel/sched/core.c:5383 [inline]
 __schedule+0x14da/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:alloc_vmap_area+0x172/0x1c70 mm/vmalloc.c:-1
Code: 0f 93 c0 44 08 f0 3c 01 75 20 e8 f9 3d b6 ff 49 c7 c4 ea ff ff ff 49 bf 00 00 00 00 00 fc ff df 4c 8b 6c 24 70 e9 fe 19 00 00 <4c> 89 ac 24 c0 00 00 00 80 3d 67 d7 7a 0c 00 0f 84 27 1a 00 00 48
RSP: 0018:ffffc900045bf720 EFLAGS: 00000297
RAX: ffffffff81cf5200 RBX: 0000000000000001 RCX: ffff88802b51da00
RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc900045bf890 R08: 00000000ffffffff R09: 0000000000500dc0
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: 0000000000002000
R13: 0000000000000001 R14: 00000000ffffff00 R15: 0000000000000000
 __get_vm_area_node+0x162/0x370 mm/vmalloc.c:2620
 __vmalloc_node_range+0x36e/0x1320 mm/vmalloc.c:3299
 __vmalloc_node mm/vmalloc.c:3404 [inline]
 __vmalloc+0x7a/0x90 mm/vmalloc.c:3418
 bpf_prog_alloc_no_stats+0x47/0x440 kernel/bpf/core.c:98
 bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136
 bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2681
 __sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5473
 __do_sys_bpf kernel/bpf/syscall.c:5577 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5575 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5575
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0b2798f749
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:00007f0b288b8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0b27be6090 RCX: 00007f0b2798f749
RDX: 0000000000000080 RSI: 0000200000000280 RDI: 0000000000000005
RBP: 00007f0b27a13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b27be6128 R14: 00007f0b27be6090 R15: 00007ffef98e5258
 </TASK>
CPU: 0 PID: 10723 Comm: syz.9.1155 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:filter_irq_stacks+0x0/0x90 kernel/stacktrace.c:394
Code: 5f 5d c3 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 76 ff ff ff 4c 89 f7 e8 5e 86 68 00 e9 69 ff ff ff e8 14 fe f2 08 0f 1f 40 00 <f3> 0f 1e fa 41 57 41 56 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89
RSP: 0018:ffffc90000007140 EFLAGS: 00000286
RAX: 0000000000000023 RBX: ffffc900000071a0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000023 RDI: ffffc900000071a0
RBP: 0000000000000000 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: dffffc0000000000
R13: 1ffff92000000e90 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f0b288b86c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005596b8865088 CR3: 0000000045130000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __stack_depot_save+0x1f/0x630 lib/stackdepot.c:377
 kasan_save_stack+0x4d/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
 __call_rcu_common kernel/rcu/tree.c:2721 [inline]
 call_rcu+0x158/0x930 kernel/rcu/tree.c:2837
 refdst_drop include/net/dst.h:270 [inline]
 skb_dst_drop include/net/dst.h:282 [inline]
 __dev_queue_xmit+0x90b/0x35a0 net/core/dev.c:4380
 dev_queue_xmit include/linux/netdevice.h:3113 [inline]
 neigh_hh_output include/net/neighbour.h:527 [inline]
 neigh_output include/net/neighbour.h:541 [inline]
 ip6_finish_output2+0xdf5/0x1650 net/ipv6/ip6_output.c:141
 dst_output include/net/dst.h:467 [inline]
 NF_HOOK include/linux/netfilter.h:304 [inline]
 ndisc_send_skb+0xbed/0x14b0 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4006
 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x52d/0x7d0 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:debug_objects_fill_pool+0xe4/0x6b0 lib/debugobjects.c:619
Code: e0 45 43 c7 04 2f 00 00 00 00 43 c7 44 2f 14 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 00 01 00 00 0f 85 bf 05 00 00 <48> 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 89 5c 24 20 eb 11
RSP: 0018:ffffc900045bf020 EFLAGS: 00000246
RAX: 409f0e410230c000 RBX: ffffffff842636a3 RCX: 409f0e410230c000
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: ffffc900045bf170 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: dffffc0000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff920008b7e0c
 debug_object_activate+0x36/0x4b0 lib/debugobjects.c:705
 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline]
 __call_rcu_common kernel/rcu/tree.c:2706 [inline]
 call_rcu+0xab/0x930 kernel/rcu/tree.c:2837
 thread_stack_delayed_free kernel/fork.c:231 [inline]
 free_thread_stack kernel/fork.c:337 [inline]
 release_task_stack kernel/fork.c:590 [inline]
 put_task_stack+0x147/0x200 kernel/fork.c:597
 finish_task_switch+0x442/0x920 kernel/sched/core.c:5287
 context_switch kernel/sched/core.c:5383 [inline]
 __schedule+0x14da/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:alloc_vmap_area+0x172/0x1c70 mm/vmalloc.c:-1
Code: 0f 93 c0 44 08 f0 3c 01 75 20 e8 f9 3d b6 ff 49 c7 c4 ea ff ff ff 49 bf 00 00 00 00 00 fc ff df 4c 8b 6c 24 70 e9 fe 19 00 00 <4c> 89 ac 24 c0 00 00 00 80 3d 67 d7 7a 0c 00 0f 84 27 1a 00 00 48
RSP: 0018:ffffc900045bf720 EFLAGS: 00000297
RAX: ffffffff81cf5200 RBX: 0000000000000001 RCX: ffff88802b51da00
RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc900045bf890 R08: 00000000ffffffff R09: 0000000000500dc0
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: 0000000000002000
R13: 0000000000000001 R14: 00000000ffffff00 R15: 0000000000000000
 __get_vm_area_node+0x162/0x370 mm/vmalloc.c:2620
 __vmalloc_node_range+0x36e/0x1320 mm/vmalloc.c:3299
 __vmalloc_node mm/vmalloc.c:3404 [inline]
 __vmalloc+0x7a/0x90 mm/vmalloc.c:3418
 bpf_prog_alloc_no_stats+0x47/0x440 kernel/bpf/core.c:98
 bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136
 bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2681
 __sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5473
 __do_sys_bpf kernel/bpf/syscall.c:5577 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5575 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5575
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0b2798f749
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:00007f0b288b8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0b27be6090 RCX: 00007f0b2798f749
RDX: 0000000000000080 RSI: 0000200000000280 RDI: 0000000000000005
RBP: 00007f0b27a13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b27be6128 R14: 00007f0b27be6090 R15: 00007ffef98e5258
 </TASK>