rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10456 ticks this GP) idle=834c/1/0x4000000000000000 softirq=16818/16823 fqs=4316
rcu: hardirqs softirqs csw/system
rcu: number: 1351566 0 0
rcu: cputime: 17132 35357 66 ==> 52490(ms)
rcu: (t=10500 jiffies g=18365 q=2836 ncpus=2)
CPU: 0 PID: 7351 Comm: syz.3.470 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1001 [inline]
RIP: 0010:debug_check_no_obj_freed+0x51f/0x540 lib/debugobjects.c:1020
Code: 00 00 00 00 00 fc ff df e9 53 fe ff ff 4c 8b 74 24 28 4c 8b 7c 24 20 eb 02 31 db 48 8b 7c 24 10 48 8b 74 24 08 e8 b1 59 5d 06 <3b> 1d e3 89 5a 0a 0f 8e bd fb ff ff 89 1d d7 89 5a 0a e9 b2 fb ff
RSP: 0018:ffffc90000006948 EFLAGS: 00000246
RAX: 48ac7c6009bbf800 RBX: 0000000000000003 RCX: 0000000000000500
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: 00000000ffffffff
RBP: 0000000000000000 R08: ffffffff911bf5f7 R09: 1ffffffff2237ebe
R10: dffffc0000000000 R11: fffffbfff2237ebf R12: ffff88802e479c00
R13: ffff88802e479800 R14: ffff88802e479000 R15: 0000000000000001
FS: 00007f3dbb1e56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561543242cd0 CR3: 0000000076d06000 CR4: 00000000003506f0
Call Trace:
slab_free_hook mm/slub.c:1786 [inline]
slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
skb_kfree_head net/core/skbuff.c:949 [inline]
skb_free_head net/core/skbuff.c:961 [inline]
skb_release_data+0x634/0x800 net/core/skbuff.c:991
skb_release_all net/core/skbuff.c:1057 [inline]
__kfree_skb net/core/skbuff.c:1071 [inline]
kfree_skb_reason+0x10e/0x170 net/core/skbuff.c:1107
kfree_skb include/linux/skbuff.h:1232 [inline]
ipip6_tunnel_xmit net/ipv6/sit.c:1041 [inline]
sit_tunnel_xmit+0xdaa/0x2010 net/ipv6/sit.c:1076
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3658 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3674
__dev_queue_xmit+0x1ac2/0x36b0 net/core/dev.c:4464
neigh_output include/net/neighbour.h:543 [inline]
ip6_finish_output2+0xe3d/0x1630 net/ipv6/ip6_output.c:141
ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline]
udp_tunnel6_xmit_skb+0x53e/0x970 net/ipv6/ip6_udp_tunnel.c:109
geneve6_xmit_skb drivers/net/geneve.c:1088 [inline]
geneve_xmit+0x232d/0x3430 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:3658 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3674
__dev_queue_xmit+0x1ac2/0x36b0 net/core/dev.c:4464
neigh_output include/net/neighbour.h:543 [inline]
ip6_finish_output2+0xe3d/0x1630 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+0xc26/0x14f0 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 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+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+0x481/0x4f0 kernel/smp.c:418
Code: 75 11 e8 02 02 0b 00 48 85 db 75 16 e8 f8 01 0b 00 eb 15 e8 f1 01 0b 00 e8 0c 29 08 09 48 85 db 74 ea e8 e2 01 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:ffffc900102afa00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000cefa000 RSI: 0000000000002c2c RDI: 0000000000002c2d
RBP: ffffc900102afad0 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf
R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: 1ffff92002055f44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92002055f65
smp_call_function_single+0x36d/0x5a0 kernel/smp.c:647
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x5be/0x920 kernel/events/core.c:2948
__do_sys_perf_event_open kernel/events/core.c:12915 [inline]
__se_sys_perf_event_open+0x1836/0x1c50 kernel/events/core.c:12567
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3dba39aeb9
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:00007f3dbb1e5028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3dba615fa0 RCX: 00007f3dba39aeb9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f3dba408c1f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3dba616038 R14: 00007f3dba615fa0 R15: 00007ffe0f3b2868