rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17498/1:b..l
(detected by 1, t=10502 jiffies, g=98541, q=735 ncpus=2)
task:syz.0.3555 state:R running task stack:25496 pid:17498 ppid:16513 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x13e/0x1c0 kernel/softirq.c:428
Code: 8a e8 46 56 dd 08 65 66 8b 05 7e 3b b4 7e 66 85 c0 75 54 bf 01 00 00 00 e8 6f 85 09 00 e8 0a 79 39 00 fb 65 8b 05 2a 0a b3 7e <85> c0 75 05 e8 79 1e b1 ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000c5577e0 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 219ccbb998c01f00
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0de0
RBP: ffffc9000c557870 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: ffffffff886a8298
R13: ffff888079ff3280 R14: dffffc0000000000 R15: 1ffff920018aaefc
local_bh_enable include/linux/bottom_half.h:33 [inline]
xdp_test_run_batch net/bpf/test_run.c:340 [inline]
bpf_test_run_xdp_live+0x1834/0x1a90 net/bpf/test_run.c:362
bpf_prog_test_run_xdp+0x736/0xf10 net/bpf/test_run.c:1412
bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3695
__sys_bpf+0x62b/0x780 kernel/bpf/syscall.c:5048
__do_sys_bpf kernel/bpf/syscall.c:5134 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5132 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5132
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6a8539c799
RSP: 002b:00007f6a8623b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f6a85615fa0 RCX: 00007f6a8539c799
RDX: 0000000000000048 RSI: 0000200000000600 RDI: 000000000000000a
RBP: 00007f6a85432bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a85616038 R14: 00007f6a85615fa0 R15: 00007ffe7cab3d68
rcu: rcu_preempt kthread starved for 10314 jiffies! g98541 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:27472 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 17503 Comm: syz.1.3556 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:perf_trace_buf_alloc+0x0/0x300 kernel/trace/trace_event_perf.c:403
Code: 01 00 00 00 00 ad de 48 89 03 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 50 e9 f7 ff 43 80 7c 25 00 00 75 d3 eb d9 66 0f 1f 44 00 00 <55> 41 57 41 56 41 55 41 54 53 50 49 89 d7 49 89 f6 89 fb e8 28 e9
RSP: 0018:ffffc900000073b8 EFLAGS: 00000086
RAX: 1ffffffff196ff7c RBX: dffffc0000000000 RCX: 150241abbb4eed00
RDX: ffffc90000007420 RSI: ffffc90000007400 RDI: 0000000000000014
RBP: ffffc90000007498 R08: ffffffff8e1fcd2f R09: 1ffffffff1c3f9a5
R10: dffffc0000000000 R11: fffffbfff1c3f9a6 R12: ffffffff8cb7fb60
R13: ffffe8ffffc34f78 R14: ffffffff8cb7fbe0 R15: 1ffff92000000e7c
FS: 00007f6ce58026c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001740 CR3: 000000005fe98000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
perf_trace_preemptirq_template+0x143/0x320 include/trace/events/preemptirq.h:14
trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
trace_hardirqs_off_finish+0x13f/0x180 kernel/trace/trace_preemptirq.c:67
irqentry_enter+0x33/0x50 kernel/entry/common.c:382
sysvec_irq_work+0xa/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x13e/0x1c0 kernel/softirq.c:428
Code: 8a e8 46 56 dd 08 65 66 8b 05 7e 3b b4 7e 66 85 c0 75 54 bf 01 00 00 00 e8 6f 85 09 00 e8 0a 79 39 00 fb 65 8b 05 2a 0a b3 7e <85> c0 75 05 e8 79 1e b1 ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc900000075a0 EFLAGS: 00000286
RAX: 0000000000000101 RBX: 0000000000000200 RCX: 150241abbb4eed00
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0de0
RBP: ffffc90000007630 R08: ffffffff90af5337 R09: 1ffffffff215ea66
R10: dffffc0000000000 R11: fffffbfff215ea67 R12: ffffffff8903bf15
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000eb4
local_bh_enable include/linux/bottom_half.h:33 [inline]
ip6t_do_table+0x131e/0x14d0 net/ipv6/netfilter/ip6_tables.c:377
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xb9/0x200 net/netfilter/core.c:614
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK include/linux/netfilter.h:300 [inline]
ndisc_send_skb+0x1390/0x14e0 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2d1/0x630 net/ipv6/addrconf.c:3979
call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 00 00 00 66 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 9e 02 2e f7 48 89 df e8 e6 ca 2e f7 e8 31 1f 52 f7 fb bf 01 00 00 00 86 2b 22 f7 65 8b 05 47 b0 cb 75 85 c0 74 02 5b c3 e8 94 c4 c9
RSP: 0018:ffffc9000c4a7b30 EFLAGS: 00000286
RAX: 150241abbb4eed00 RBX: ffff888028371280 RCX: 150241abbb4eed00
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: 0000000000000001
RBP: ffffc9000c4a7c90 R08: ffff8880b8e3580b R09: 1ffff110171c6b01
R10: dffffc0000000000 R11: ffffed10171c6b02 R12: dffffc0000000000
R13: 0000000100000000 R14: 0000000000000000 R15: 0000000000000020
set_current_blocked kernel/signal.c:3044 [inline]
signal_delivered kernel/signal.c:2907 [inline]
signal_setup_done+0x2e6/0x490 kernel/signal.c:2919
handle_signal arch/x86/kernel/signal.c:846 [inline]
arch_do_signal_or_restart+0xf83/0x1350 arch/x86/kernel/signal.c:873
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6ce49bbd10
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 02 22 07 00 e8 65 65 f9 ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007f6ce5801a78 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f6ce4c15fa0 RCX: 00007f6ce499c799
RDX: 00007f6ce5801a80 RSI: 00007f6ce5801bb0 RDI: 0000000000000021
RBP: 00007f6ce4a32bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ce4c16038 R14: 00007f6ce4c15fa0 R15: 00007ffe87cdd7f8