INFO: rcu detected stall in ip

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
linux-6.1	INFO: rcu detected stall in ip_expire (2)	1	1	7h54m	7h53m	0/3	upstream: reported on 2026/06/07 02:40
linux-6.1	INFO: rcu detected stall in ip_expire	1	1	623d	623d	0/3	auto-obsoleted due to no activity on 2024/12/30 13:44
linux-5.15	INFO: rcu detected stall in ip_expire	1	1	191d	191d	0/3	auto-obsoleted due to no activity on 2026/03/08 05:26
upstream	INFO: rcu detected stall in ip_expire net	1	1	2105d	2105d	0/29	auto-closed as invalid on 2020/11/30 05:39

rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10501 ticks this GP) idle=e62/1/0x4000000000000000 softirq=48950/48950 fqs=119 (t=10502 jiffies g=77701 q=2550) NMI backtrace for cpu 1 CPU: 1 PID: 24312 Comm: syz-executor.0 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x1e3/0x21e kernel/rcu/tree_stall.h:337 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline] check_cpu_stall kernel/rcu/tree_stall.h:643 [inline] rcu_pending kernel/rcu/tree.c:3751 [inline] rcu_sched_clock_irq.cold+0x472/0xec3 kernel/rcu/tree.c:2580 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:call_rcu+0x2e7/0x700 kernel/rcu/tree.c:3039 Code: 3c 02 00 0f 85 bb 03 00 00 48 8b 05 73 f5 d6 09 49 03 84 24 f0 00 00 00 49 39 c7 0f 8f 65 01 00 00 e8 2d 83 18 00 ff 34 24 9d <48> 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 80 3c 02 00 0f 84 2f RSP: 0018:ffffc90000db0c80 EFLAGS: 00000246 RAX: 0000000000d3ed2c RBX: ffff88801ca549a8 RCX: ffffffff81580a37 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: ffff8880b9f35b70 R08: 0000000000000001 R09: ffffffff8ebdb8ef R10: fffffbfff1d7b71d R11: 0000000000000000 R12: ffff8880b9f35a80 R13: ffff8880b9f35b60 R14: ffff8880b9f35b18 R15: 00000000000005f0 inet_frag_destroy+0x106/0x170 net/ipv4/inet_fragment.c:300 inet_frag_put include/net/inet_frag.h:135 [inline] ipq_put net/ipv4/ip_fragment.c:110 [inline] ip_expire+0x32c/0x830 net/ipv4/ip_fragment.c:197 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x2a5/0x9f7 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 </IRQ> __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191 Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 ea 5b 6a f8 48 89 ef e8 72 10 6b f8 f6 c7 02 75 1a 53 9d <bf> 01 00 00 00 e8 61 20 5f f8 65 8b 05 8a c5 13 77 85 c0 74 0a 5b RSP: 0018:ffffc90001a3fa50 EFLAGS: 00000287 RAX: 0000000000001301 RBX: 0000000000000287 RCX: 1ffffffff19de351 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8880276a5be8 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817845a8 R11: 0000000000000000 R12: 0000000000000287 R13: ffff8880276a5be8 R14: ffff8880b9f34c58 R15: ffff8880b9f34c40 try_to_wake_up+0x5a9/0x13b0 kernel/sched/core.c:3456 wake_up_process kernel/sched/core.c:3524 [inline] wake_up_q+0x96/0x100 kernel/sched/core.c:589 futex_wake+0x3e9/0x490 kernel/futex.c:1623 do_futex+0x322/0x1960 kernel/futex.c:3768 __do_sys_futex+0x2a2/0x470 kernel/futex.c:3826 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007faec7c2fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000119bf88 RCX: 000000000045e219 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000119bf8c RBP: 000000000119bf80 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fff0174e57f R14: 00007faec7c309c0 R15: 000000000119bf8c