[v6.1] INFO: rcu detected stall in tipc_setsockopt

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 1989cd3d56e2 Linux 6.1.167
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11aa534e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f0605c5af04d7603
dashboard link: https://syzkaller.appspot.com/bug?extid=7ba364aa6058fe8984f4
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/3e0cf5574b81/disk-1989cd3d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0c1152de55b1/vmlinux-1989cd3d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3fe87e3166b1/bzImage-1989cd3d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7ba364...@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2636 jiffies s: 318705 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 32494 Comm: syz.0.9015 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:36 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0xf1/0x770 kernel/locking/lockdep.c:4296
Code: 0f 85 18 05 00 00 83 3d 6c d9 5b 15 00 75 79 c6 44 13 04 00 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 f7 44 24 40 00 02 00 00 <c6> 44 13 04 f8 0f 85 87 03 00 00 48 c7 c0 40 e1 bf 96 48 c1 e8 03
RSP: 0018:ffffc90000007940 EFLAGS: 00000046
RAX: 0000000000000004 RBX: 1ffff92000000f2c RCX: ffffffff96bfe103
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff8cb742a0
RBP: ffffc90000007a00 R08: ffff8880b8e3580b R09: 1ffff110171c6b01
R10: dffffc0000000000 R11: ffffed10171c6b02 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fb5051ee6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d615ff8 CR3: 0000000073289000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 d2 33 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007ac0 EFLAGS: 00000206
RAX: c2b83d4801be7d00 RBX: 1ffff92000000f60 RCX: c2b83d4801be7d00
RDX: dffffc0000000000 RSI: ffffffff8a8c10a0 RDI: ffffffff8adf0d20
RBP: ffffc90000007bc0 R08: ffffffff90af734f R09: 1ffffffff215ee69
R10: dffffc0000000000 R11: fffffbfff215ee6a R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
ieee80211_rx_napi+0x221/0x3d0 net/mac80211/rx.c:5339
ieee80211_rx include/net/mac80211.h:4849 [inline]
ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:317
tasklet_action_common+0x2fe/0x4d0 kernel/softirq.c:827
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_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
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> df 0d 21 f7 65 8b 05 30 91 ca 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000459f880 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: c2b83d4801be7d00
RDX: dffffc0000000000 RSI: ffffffff8a8c10a0 RDI: 0000000000000001
RBP: ffffc9000459f908 R08: ffffffff90af734f R09: 1ffffffff215ee69
R10: dffffc0000000000 R11: fffffbfff215ee6a R12: dffffc0000000000
R13: ffffea000159dc00 R14: ffff888017440780 R15: 1ffff920008b3f10
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
get_partial_node+0x441/0x470 mm/slub.c:2252
get_partial mm/slub.c:2330 [inline]
___slab_alloc+0x968/0x1240 mm/slub.c:3131
__slab_alloc mm/slub.c:3240 [inline]
slab_alloc_node mm/slub.c:3325 [inline]
__kmem_cache_alloc_node+0x1a0/0x260 mm/slub.c:3398
kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026
kmalloc include/linux/slab.h:563 [inline]
tipc_sub_subscribe+0x115/0x760 net/tipc/subscr.c:146
tipc_conn_rcv_sub+0x136/0x350 net/tipc/topsrv.c:377
tipc_topsrv_kern_subscr+0x185/0x250 net/tipc/topsrv.c:587
tipc_group_create+0x360/0x4f0 net/tipc/group.c:190
tipc_sk_join+0x24f/0x6a0 net/tipc/socket.c:3088
tipc_setsockopt+0x6bf/0x960 net/tipc/socket.c:3205
__sys_setsockopt+0x2bf/0x3d0 net/socket.c:2287
__do_sys_setsockopt net/socket.c:2298 [inline]
__se_sys_setsockopt net/socket.c:2295 [inline]
__x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2295
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: 0033:0x7fb50439c819
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:00007fb5051ee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fb504615fa0 RCX: 00007fb50439c819
RDX: 0000000000000087 RSI: 000000000000010f RDI: 000000000000000e
RBP: 00007fb504432c91 R08: 0000000000000043 R09: 0000000000000000
R10: 00002000000008c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb504616038 R14: 00007fb504615fa0 R15: 00007ffe453f38d8
</TASK>


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