rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10388 ticks this GP) idle=b77c/1/0x4000000000000000 softirq=36659/36660 fqs=3256
rcu: hardirqs softirqs csw/system
rcu: number: 1365997 4 0
rcu: cputime: 17021 35478 43 ==> 52520(ms)
rcu: (t=10503 jiffies g=42369 q=2635 ncpus=2)
CPU: 0 PID: 11622 Comm: syz.0.1869 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rcuref_put_slowpath+0x4/0x150 lib/rcuref.c:238
Code: 51 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 7c a6 48 89 df e8 de 0b b5 fd eb 9c 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa <55> 53 89 f5 48 89 fb e8 f0 cb 5c fd bf ff ff ff ff 89 ee e8 94 cf
RSP: 0018:ffffc90000007478 EFLAGS: 00000246
RAX: ffffffff887ee820 RBX: ffff88804d1a8900 RCX: ffff88802a9b0000
RDX: 0000000000000100 RSI: 00000000ffffffff RDI: ffff88804d1a8900
RBP: ffffc90000007518 R08: ffff88804d1a8903 R09: 1ffff11009a35120
R10: dffffc0000000000 R11: ffffed1009a35121 R12: dffffc0000000000
R13: 0000000000000000 R14: 00000000ffffffff R15: 1ffff92000000e90
FS: 00007f6ce63d56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ce63d5d58 CR3: 00000000548b9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__rcuref_put include/linux/rcuref.h:97 [inline]
rcuref_put+0x20b/0x220 include/linux/rcuref.h:153
dst_release+0x24/0x1a0 net/core/dst.c:170
refdst_drop include/net/dst.h:270 [inline]
skb_dst_drop include/net/dst.h:282 [inline]
__dev_queue_xmit+0x97a/0x3660 net/core/dev.c:4405
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+0x48a/0x4f0 kernel/smp.c:418
Code: db 75 16 e8 b8 06 0b 00 eb 15 e8 b1 06 0b 00 e8 3c f6 0b 09 48 85 db 74 ea e8 a2 06 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 00 00 00 00 65 48 8b 0c 25
RSP: 0018:ffffc900036d7a00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc90012ebc000 RSI: 0000000000003d0b RDI: 0000000000003d0c
RBP: ffffc900036d7ad0 R08: ffffffff911cc5ff R09: 1ffffffff22398bf
R10: dffffc0000000000 R11: fffffbfff22398c0 R12: 1ffff920006daf44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920006daf65
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:2959
__do_sys_perf_event_open kernel/events/core.c:12957 [inline]
__se_sys_perf_event_open+0x1836/0x1c50 kernel/events/core.c:12609
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: 0033:0x7f6ce819ce59
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:00007f6ce63d5028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f6ce8416090 RCX: 00007f6ce819ce59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f6ce8232d6f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ce8416128 R14: 00007f6ce8416090 R15: 00007ffcda1b9dc8