[v6.1] INFO: rcu detected stall in inet_release (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: fdb6fcb41cc7 Linux 6.1.176
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1578a576580000
kernel config: https://syzkaller.appspot.com/x/.config?x=acfbe65fbce84c0c
dashboard link: https://syzkaller.appspot.com/bug?extid=d51c75a4369c7150e4f3
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8a12ae1ddcea/disk-fdb6fcb4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d0dd1b27df77/vmlinux-fdb6fcb4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/871bf60ea1f2/bzImage-fdb6fcb4.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d51c75...@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2683 jiffies s: 360713 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: 24185 Comm: syz.2.13018 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__lock_acquire+0x144/0x7bd0 kernel/locking/lockdep.c:4923
Code: 03 45 31 e4 44 89 7c 24 78 89 9c 24 88 00 00 00 41 83 fe 01 77 30 44 89 f0 4d 8d 7c c5 08 4c 89 f8 48 c1 e8 03 42 80 3c 00 00 <74> 12 4c 89 ff e8 82 4e 6f 00 49 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffffc900001e0440 EFLAGS: 00000046
RAX: 1ffffffff1965b6d RBX: 0000000000000001 RCX: 1ffff9200003c0a8
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8cb2db60
RBP: ffffc900001e0670 R08: dffffc0000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1c401ee R12: 0000000000000000
R13: ffffffff8cb2db60 R14: 0000000000000000 R15: ffffffff8cb2db68
FS: 00007f9deadec6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9deadcbd58 CR3: 000000007c21b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
trace_call_bpf+0xe0/0x6b0 kernel/trace/bpf_trace.c:134
perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10027
perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
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 e2 82 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:ffffc900001e0ae0 EFLAGS: 00000206
RAX: 7240d4805102f700 RBX: 1ffff9200003c164 RCX: 7240d4805102f700
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adee1a0
RBP: ffffc900001e0bd0 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3bb00 R15: 0000000000000002
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
ieee80211_iterate_active_interfaces_atomic+0x156/0x170 net/mac80211/util.c:826
mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
__run_hrtimer kernel/time/hrtimer.c:1751 [inline]
__hrtimer_run_queues+0x522/0xc90 kernel/time/hrtimer.c:1815
hrtimer_run_softirq+0x173/0x290 kernel/time/hrtimer.c:1832
handle_softirqs+0x291/0x910 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:unwind_next_frame+0x0/0x1fd0 arch/x86/kernel/unwind_orc.c:423
Code: 02 31 c0 5b 41 5e 41 5f c3 89 d9 80 e1 07 80 c1 03 38 c1 7c 97 48 89 df e8 2d 4e 9a 00 eb 8d 66 2e 0f 1f 84 00 00 00 00 00 90 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 70 48 89 fb 49 be 00 00 00
RSP: 0018:ffffc9000c5ff940 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc9000c5ffa00 RCX: 0000000080000000
RDX: dffffc0000000000 RSI: ffffffff81d342a2 RDI: ffffc9000c5ff948
RBP: ffffc9000c5ff9d0 R08: ffffc9000c5ffa10 R09: 0000000000000001
R10: dffffc0000000000 R11: fffff520018bff35 R12: ffff88807cfbbc00
R13: 1ffff920018bffac R14: ffffffff8170d250 R15: ffffc9000c5ff948
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
call_rcu+0x14f/0x950 kernel/rcu/tree.c:2849
inet_release+0x139/0x180 net/ipv4/af_inet.c:430
__sock_release net/socket.c:654 [inline]
sock_release+0x7b/0x140 net/socket.c:682
__sys_socketpair+0x503/0x540 net/socket.c:-1
__do_sys_socketpair net/socket.c:1786 [inline]
__se_sys_socketpair net/socket.c:1783 [inline]
__x64_sys_socketpair+0x97/0xb0 net/socket.c:1783
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: 0033:0x7f9de9f9ce59
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:00007f9deadec028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f9dea215fa0 RCX: 00007f9de9f9ce59
RDX: 0000000000000005 RSI: 0000000000000003 RDI: 0000000000000002
RBP: 00007f9dea032e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000240 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dea216038 R14: 00007f9dea215fa0 R15: 00007ffdb27145c8
</TASK>


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