rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10500 ticks this GP) idle=e8f4/1/0x4000000000000000 softirq=43103/43103 fqs=4106
rcu: hardirqs softirqs csw/system
rcu: number: 1443439 0 0
rcu: cputime: 16910 35568 57 ==> 52480(ms)
rcu: (t=10500 jiffies g=52285 q=2855 ncpus=2)
CPU: 0 PID: 11460 Comm: syz.1.1584 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:deref_stack_reg+0x1f5/0x240 arch/x86/kernel/unwind_orc.c:408
Code: 03 42 80 3c 38 00 74 08 48 89 df e8 25 2e a2 00 4c 89 33 b0 01 eb 0e e8 89 bf 4a 00 eb 05 e8 82 bf 4a 00 31 c0 48 83 c4 28 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 44 89 f9 80 e1 07 80 c1 03 38 c1 0f
RSP: 0018:ffffc90000006d20 EFLAGS: 00000286
RAX: 1ffff92000000d01 RBX: ffffffff8ecc608f RCX: ffff888028f70000
RDX: 0000000000000100 RSI: 0000000000000002 RDI: ffffc90000006e78
RBP: ffffc90000006e78 R08: ffff888028f70000 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000008000
R13: 1ffff92000000dd3 R14: ffffc90000006f10 R15: dffffc0000000000
FS: 00007f35843486c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000005337c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
unwind_next_frame+0x1789/0x2970 arch/x86/kernel/unwind_orc.c:648
__unwind_start+0x66a/0x7e0 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xf8/0x190 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x280 mm/slub.c:3852
kfree_skb include/linux/skbuff.h:1232 [inline]
xfrmi_xmit+0xcf7/0x1820 net/xfrm/xfrm_interface_core.c:583
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3619 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3635
__dev_queue_xmit+0x1a64/0x35a0 net/core/dev.c:4425
neigh_output include/net/neighbour.h:543 [inline]
ip6_finish_output2+0xe2e/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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x26a/0x920 kernel/sched/core.c:5254
Code: 0f 84 37 01 00 00 48 85 db 0f 85 56 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 80 ca 14 09 e8 4b a4 2f 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900039e77f8 EFLAGS: 00000282
RAX: dba71424562ca200 RBX: 0000000000000000 RCX: dba71424562ca200
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc6f80
RBP: ffffc900039e7850 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: ffff888028f70000
R13: dffffc0000000000 R14: ffff88802ab5da00 R15: ffff8880b8e3cac8
context_switch kernel/sched/core.c:5383 [inline]
__schedule+0x14da/0x44d0 kernel/sched/core.c:6699
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866
preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
class_preempt_destructor include/linux/preempt.h:478 [inline]
try_to_wake_up+0x756/0x1140 kernel/sched/core.c:4355
wake_up_process kernel/sched/core.c:4480 [inline]
wake_up_q+0xb6/0x100 kernel/sched/core.c:1031
futex_wake+0x40d/0x4b0 kernel/futex/waitwake.c:184
do_futex+0x35d/0x3e0 kernel/futex/syscalls.c:139
__do_sys_futex kernel/futex/syscalls.c:211 [inline]
__se_sys_futex+0x36f/0x3f0 kernel/futex/syscalls.c:192
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: 0033:0x7f358358f749
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:00007f35843480e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f35837e5fa8 RCX: 00007f358358f749
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f35837e5fac
RBP: 00007f35837e5fa0 R08: 0000000000745d1e R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f35837e6038 R14: 00007ffd04e8fa80 R15: 00007ffd04e8fb68