[v5.15] INFO: rcu detected stall in neigh_timer_handler (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3330a8d33e08 Linux 5.15.201
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=113b055a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=353ae28c40b35af5
dashboard link: https://syzkaller.appspot.com/bug?extid=89aad70ea7a6ac27f55d
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/805fe5d5059e/disk-3330a8d3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/27b51f6fcd64/vmlinux-3330a8d3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c9998071ec80/bzImage-3330a8d3.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+89aad7...@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P30769
(detected by 0, t=10502 jiffies, g=114221, q=9148)
task:syz.4.4836 state:R running task stack:26800 pid:30769 ppid: 24375 flags:0x0000400c
Call Trace:
<IRQ>
sched_show_task+0x459/0x580 kernel/sched/core.c:8659
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:233 [inline]
print_other_cpu_stall+0xec5/0x1270 kernel/rcu/tree_stall.h:573
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3936 [inline]
rcu_sched_clock_irq+0x843/0x1120 kernel/rcu/tree.c:2619
update_process_times+0x193/0x200 kernel/time/timer.c:2021
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4ad/0xb70 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:kasan_set_free_info+0x0/0x40 mm/kasan/generic.c:353
Code: 00 0f 85 6b ff ff ff eb dc a8 01 74 06 48 ff c8 48 89 c7 48 c7 c6 ba e9 d9 8b e8 bb df ed ff 0f 0b 66 0f 1f 84 00 00 00 00 00 <53> 48 89 f3 e8 17 e2 ff ff 48 85 c0 74 23 48 83 c0 08 48 89 c7 be
RSP: 0018:ffffc90000007370 EFLAGS: 00000246
RAX: ffffed100ac56c28 RBX: ffff8880562b6140 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8880562b6140 RDI: ffff888144bf0140
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed100ac56c28
R10: 0000000000000001 R11: 0000000000000100 R12: ffffffff81bd64ff
R13: ffff8880562b6140 R14: ffff888144bf0140 R15: 0000000000000000
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1710 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
slab_free mm/slub.c:3504 [inline]
kmem_cache_free+0x8f/0x210 mm/slub.c:3520
packet_rcv+0x16a/0x1210 net/packet/af_packet.c:2243
dev_queue_xmit_nit+0xa69/0xb00 net/core/dev.c:2386
xmit_one net/core/dev.c:3657 [inline]
dev_hard_start_xmit+0x13e/0x7e0 net/core/dev.c:3678
__dev_queue_xmit+0x1a78/0x2fd0 net/core/dev.c:4301
NF_HOOK+0x2fe/0x380 include/linux/netfilter.h:302
arp_xmit+0x142/0x230 net/ipv4/arp.c:643
arp_solicit+0xba5/0xde0 net/ipv4/arp.c:391
neigh_probe net/core/neighbour.c:1017 [inline]
neigh_timer_handler+0xaa9/0xfe0 net/core/neighbour.c:1099
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:finish_lock_switch+0x134/0x280 kernel/sched/core.c:4804
Code: be ff ff ff ff e8 6c c1 67 08 85 c0 74 4a 4d 85 ff 75 66 0f 1f 44 00 00 48 89 df e8 16 2d 71 08 e8 21 e4 2a 00 fb 48 83 c4 08 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 c9 09 fe ff 43 80 3c
RSP: 0018:ffffc9000312f848 EFLAGS: 00000286
RAX: 6d372c4567ebed00 RBX: ffff8880b903a340 RCX: 6d372c4567ebed00
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f800
RBP: 1ffff11017207613 R08: ffffffff901d31df R09: 1ffffffff203a63b
R10: dffffc0000000000 R11: fffffbfff203a63c R12: 1ffff110172075c1
R13: dffffc0000000000 R14: ffff8880b903ae08 R15: 0000000000000000
finish_task_switch+0x12f/0x640 kernel/sched/core.c:4921
context_switch kernel/sched/core.c:5052 [inline]
__schedule+0x11f7/0x43c0 kernel/sched/core.c:6395
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6571
preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6596
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__local_bh_enable_ip+0x147/0x1c0 kernel/softirq.c:408
spin_unlock_bh include/linux/spinlock.h:409 [inline]
tipc_nametbl_build_group+0x3d2/0x490 net/tipc/name_table.c:753
tipc_sk_join+0x399/0x6a0 net/tipc/socket.c:3093
tipc_setsockopt+0x6bf/0x960 net/tipc/socket.c:3201
__sys_setsockopt+0x2bf/0x3d0 net/socket.c:2212
__do_sys_setsockopt net/socket.c:2223 [inline]
__se_sys_setsockopt net/socket.c:2220 [inline]
__x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2220
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f87dbce7629
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:00007f87d9f20028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f87dbf61090 RCX: 00007f87dbce7629
RDX: 0000000000000087 RSI: 000000000000010f RDI: 000000000000000c
RBP: 00007f87dbd7db39 R08: 0000000000000043 R09: 0000000000000000
R10: 00002000000008c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f87dbf61128 R14: 00007f87dbf61090 R15: 00007ffce1301188
</TASK>


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