rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=0fec/1/0x4000000000000000 softirq=36061/36067 fqs=3747
rcu: hardirqs softirqs csw/system
rcu: number: 1458255 0 0
rcu: cputime: 17299 35170 58 ==> 52470(ms)
rcu: (t=10500 jiffies g=46689 q=1023 ncpus=2)
CPU: 1 PID: 11712 Comm: syz.1.2146 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:___slab_alloc+0x1114/0x12f0 mm/slub.c:3318
Code: c7 44 24 60 00 00 00 00 9c 8f 44 24 60 f7 44 24 60 00 02 00 00 75 7a 41 f7 c6 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 68 0f 85 ef 00 00 00 4c 89 e8 48 83 c4 70 5b 41 5c 41
RSP: 0018:ffffc900001efa30 EFLAGS: 00000206
RAX: 80f744c99f551800 RBX: ffff8880b8f402a0 RCX: 80f744c99f551800
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: ffffffff8b1c7be0
RBP: ffffffff81debe1f R08: ffffffff911bc5f7 R09: 1ffffffff22378be
R10: dffffc0000000000 R11: fffffbfff22378bf R12: 0000000000000001
R13: ffff88802f069b00 R14: 0000000000000246 R15: 0000000000000001
FS: 00007f0ff716e6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2b7b3d CR3: 000000004d9af000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__slab_alloc mm/slub.c:3339 [inline]
__slab_alloc_node mm/slub.c:3392 [inline]
slab_alloc_node mm/slub.c:3485 [inline]
__kmem_cache_alloc_node+0x11f/0x250 mm/slub.c:3534
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc_node_track_caller+0xa4/0x230 mm/slab_common.c:1027
__do_krealloc mm/slab_common.c:1402 [inline]
krealloc+0x86/0x120 mm/slab_common.c:1435
nf_ct_ext_add+0x1ad/0x440 net/netfilter/nf_conntrack_extend.c:117
nf_ct_labels_ext_add include/net/netfilter/nf_conntrack_labels.h:45 [inline]
init_conntrack+0x5e9/0xf40 net/netfilter/nf_conntrack_core.c:1756
resolve_normal_ct net/netfilter/nf_conntrack_core.c:1858 [inline]
nf_conntrack_in+0xc29/0x1630 net/netfilter/nf_conntrack_core.c:2010
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
__ip6_local_out+0x784/0x8a0 net/ipv6/output_core.c:143
ip6_local_out+0x2a/0x130 net/ipv6/output_core.c:153
ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline]
udp_tunnel6_xmit_skb+0x516/0x930 net/ipv6/ip6_udp_tunnel.c:110
geneve6_xmit_skb drivers/net/geneve.c:1088 [inline]
geneve_xmit+0x2428/0x3530 drivers/net/geneve.c:1117
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3644 [inline]
dev_hard_start_xmit+0x269/0x790 net/core/dev.c:3660
__dev_queue_xmit+0x198c/0x3630 net/core/dev.c:4454
neigh_output include/net/neighbour.h:543 [inline]
ip6_finish_output2+0xe2e/0x1620 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+0xbb9/0x1480 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4029
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x570/0x810 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:generic_exec_single+0x477/0x4e0 kernel/smp.c:418
Code: 75 11 e8 2c 00 0b 00 48 85 db 75 16 e8 22 00 0b 00 eb 15 e8 1b 00 0b 00 e8 06 f3 07 09 48 85 db 74 ea e8 0c 00 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 43 c7 44 2c 08
RSP: 0018:ffffc9000347fa00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000d50b000 RSI: 0000000000002bbe RDI: 0000000000002bbf
RBP: ffffc9000347fad0 R08: ffffffff911bc5ff R09: 1ffffffff22378bf
R10: dffffc0000000000 R11: fffffbfff22378c0 R12: 1ffff9200068ff44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff9200068ff65
smp_call_function_single+0x36d/0x5a0 kernel/smp.c:647
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x5bb/0x920 kernel/events/core.c:2951
__do_sys_perf_event_open kernel/events/core.c:12949 [inline]
__se_sys_perf_event_open+0x1841/0x1c60 kernel/events/core.c:12601
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0ff639ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0ff716e028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f0ff6615fa0 RCX: 00007f0ff639ce59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f0ff6432e6f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0ff6616038 R14: 00007f0ff6615fa0 R15: 00007ffe521be9b8