rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=4754/1/0x4000000000000000 softirq=11584/11586 fqs=4223
rcu: hardirqs softirqs csw/system
rcu: number: 1423152 0 0
rcu: cputime: 17788 34701 60 ==> 52490(ms)
rcu: (t=10500 jiffies g=10061 q=1947 ncpus=2)
CPU: 1 PID: 5935 Comm: syz.0.32 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:unwind_get_return_address+0x5/0xc0 arch/x86/kernel/unwind_orc.c:365
Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c 49 ff ff ff 48 89 df e8 0e 50 a4 00 e9 3c ff ff ff e8 54 32 51 09 0f 1f 40 00 f3 0f 1e fa 55 <41> 57 41 56 53 48 89 fb 49 be 00 00 00 00 00 fc ff df e8 84 d2 4b
RSP: 0018:ffffc900001ef658 EFLAGS: 00000246
RAX: ffffffff81331552 RBX: ffffc900001ef720 RCX: ffff888076f8da00
RDX: 0000000000000100 RSI: 0000000000000302 RDI: ffffc900001ef668
RBP: ffffc900001ef6f0 R08: ffff888076f8da00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8943a5eb
R13: 0000000000000138 R14: ffffffff81760e70 R15: ffffc900001ef668
FS: 00007f26a2c366c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000001 CR3: 00000000762b1000 CR4: 00000000003506e0
Call Trace:
arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:770
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x17e/0x2c0 mm/slub.c:3519
__nf_conntrack_alloc+0x93/0x370 net/netfilter/nf_conntrack_core.c:1604
init_conntrack+0x166/0xdb0 net/netfilter/nf_conntrack_core.c:1695
resolve_normal_ct net/netfilter/nf_conntrack_core.c:1815 [inline]
nf_conntrack_in+0xc29/0x15b0 net/netfilter/nf_conntrack_core.c:1967
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook+0x228/0x390 include/linux/netfilter.h:259
__ip_local_out+0x4db/0x5f0 net/ipv4/ip_output.c:118
ip_local_out+0x2a/0x130 net/ipv4/ip_output.c:127
iptunnel_xmit+0x4d0/0x910 net/ipv4/ip_tunnel_core.c:82
udp_tunnel_xmit_skb+0x22f/0x380 net/ipv4/udp_tunnel_core.c:172
geneve_xmit_skb drivers/net/geneve.c:1007 [inline]
geneve_xmit+0x26c3/0x3530 drivers/net/geneve.c:1120
__netdev_start_xmit include/linux/netdevice.h:4945 [inline]
netdev_start_xmit include/linux/netdevice.h:4959 [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
dev_queue_xmit include/linux/netdevice.h:3115 [inline]
neigh_hh_output include/net/neighbour.h:527 [inline]
neigh_output include/net/neighbour.h:541 [inline]
ip6_finish_output2+0xdf7/0x1620 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:4036
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:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0x10/0xb0 kernel/rcu/tree.c:700
Code: 86 13 8d 4c 89 f6 e8 2f 0b f4 02 e9 44 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 57 41 56 53 65 ff 05 d8 7e 92 7e fb b0 1b 09 89 c3 83 f8 08 73 60 49 bf 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90004a6fc40 EFLAGS: 00000282
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888076f8da00
RDX: ffff888076f8da00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004a6fce8 R08: dffffc0000000000 R09: 1ffffffff223d6a0
R10: dffffc0000000000 R11: fffffbfff223d6a1 R12: 0000000000000001
R13: 0000000000000008 R14: 1ffff9200094df8c R15: dffffc0000000000
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x6c/0x110 kernel/rcu/update.c:123
fd_install+0x158/0x4e0 fs/file.c:608
__do_sys_perf_event_open kernel/events/core.c:12970 [inline]
__se_sys_perf_event_open+0x19fe/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: 0033:0x7f26a1d9de99
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:00007f26a2c36028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f26a2026180 RCX: 00007f26a1d9de99
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f26a1e33eaf R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26a2026218 R14: 00007f26a2026180 R15: 00007ffed92d6228