rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2689 jiffies s: 4597 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4694 Comm: syz.2.188 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:212
Code: 2e 0f 1f 84 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d f0 59 9d 0c 48 89 de 5b e9 27 22 50 00 00 00 cc cc 00 00 cc <48> 8b 04 24 65 48 8b 0d 84 fb 7f 7e 65 8b 15 85 fb 7f 7e 81 e2 00
RSP: 0018:ffffc900001dfda0 EFLAGS: 00000083
RAX: ffffffff8172b482 RBX: 0000000000462038 RCX: ffff88802a8a3b80
RDX: 0000000000010100 RSI: 000001fb63109b96 RDI: 0000000000462038
RBP: 0000000000007496 R08: ffffffff8e1fcb6f R09: 1ffffffff1c3f96d
R10: dffffc0000000000 R11: fffffbfff1c3f96e R12: ffffffffffb9dfc7
R13: 000000515e882f61 R14: 1fffffffffffffff R15: 000001fb63109b96
FS:  000055557bd80500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001f208 CR3: 000000007e5c0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 timekeeping_get_delta kernel/time/timekeeping.c:273 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
 ktime_get+0x18c/0x270 kernel/time/timekeeping.c:848
 clockevents_program_event+0xe2/0x310 kernel/time/clockevents.c:326
 hrtimer_interrupt+0x59d/0x9c0 kernel/time/hrtimer.c:1886
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 0f 3c 22 f7 65 8b 05 d0 c0 cb 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e0040 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 5196e2f699dd4d00
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: 0000000000000001
RBP: ffffc900001e00d0 R08: ffffffff90af434f R09: 1ffffffff215e869
R10: dffffc0000000000 R11: fffffbfff215e86a R12: dffffc0000000000
R13: 1ffff9200003c02c R14: ffffffff96eed410 R15: 1ffff9200003c008
 debug_rcu_head_queue kernel/rcu/rcu.h:191 [inline]
 call_rcu+0xbb/0x990 kernel/rcu/tree.c:2834
 refdst_drop include/net/dst.h:256 [inline]
 skb_dst_drop include/net/dst.h:268 [inline]
 skb_release_head_state+0x6d/0x240 net/core/skbuff.c:840
 skb_release_all net/core/skbuff.c:854 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 kfree_skb_reason+0x133/0x370 net/core/skbuff.c:893
 kfree_skb include/linux/skbuff.h:1220 [inline]
 vti6_tnl_xmit+0xdb9/0x1960 net/ipv6/ip6_vti.c:596
 __netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 netdev_start_xmit include/linux/netdevice.h:4910 [inline]
 xmit_one net/core/dev.c:3683 [inline]
 dev_hard_start_xmit+0x262/0x870 net/core/dev.c:3699
 __dev_queue_xmit+0x1a7f/0x37f0 net/core/dev.c:4359
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0xdd6/0x15d0 net/ipv6/ip6_output.c:138
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xbf1/0x14e0 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2d1/0x630 net/ipv6/addrconf.c:3979
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x53e/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:unwind_next_frame+0x97c/0x20b0 arch/x86/kernel/unwind_orc.c:-1
Code: 84 c0 0f 85 72 11 00 00 4d 89 f7 49 c1 ef 03 43 0f b6 04 2f 84 c0 0f 85 7d 11 00 00 0f b6 45 01 83 e0 03 ff 24 c5 d0 80 89 8a <4c> 89 74 24 70 4c 89 64 24 20 4c 8d 73 08 4d 89 f4 49 c1 ec 03 43
RSP: 0018:ffffc90004c1f890 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90004c1f968 RCX: ffffffff8e95004c
RDX: ffffc90004c1ff58 RSI: ffffffff8e950010 RDI: ffffffff8139198f
RBP: ffffffff8f376d8c R08: 000000000000000f R09: 0000000000000007
R10: dffffc0000000000 R11: fffff52000983f39 R12: ffffffff8f376d88
R13: dffffc0000000000 R14: ffffffff8f376d8d R15: 1ffffffff1e6edb1
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486
 task_work_add+0x7f/0x330 kernel/task_work.c:48
 fput+0xd9/0x1a0 fs/file_table.c:376
 filp_close+0x108/0x150 fs/open.c:1439
 __range_close fs/file.c:703 [inline]
 __close_range+0x58b/0x780 fs/file.c:753
 __do_sys_close_range fs/open.c:1478 [inline]
 __se_sys_close_range fs/open.c:1475 [inline]
 __x64_sys_close_range+0x76/0x80 fs/open.c:1475
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb82999aeb9
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:00007ffc5ef75bf8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffc5ef75ce0 RCX: 00007fb82999aeb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000001f208 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2db20000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb829c15fac R14: 00007fb829c15fa8 R15: 00007fb829c15fa0
 </TASK>