============================================
WARNING: possible recursive locking detected
6.12.0-rc4-syzkaller-00168-gd0b98f6a17a5 #0 Not tainted
--------------------------------------------
syz.1.295/6726 is trying to acquire lock:
ffffc9000c4d50d8 (&rb->spinlock){-.-.}-{2:2}, at: __bpf_ringbuf_reserve+0x1ea/0x600 kernel/bpf/ringbuf.c:427

but task is already holding lock:
ffffc9000564f0d8 (&rb->spinlock){-.-.}-{2:2}, at: __bpf_ringbuf_reserve+0x1ea/0x600 kernel/bpf/ringbuf.c:427

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&rb->spinlock);
  lock(&rb->spinlock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

3 locks held by syz.1.295/6726:
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: sk_psock_verdict_recv+0x4d/0x590 net/core/skmsg.c:1186
 #1: ffffc9000564f0d8 (&rb->spinlock){-.-.}-{2:2}, at: __bpf_ringbuf_reserve+0x1ea/0x600 kernel/bpf/ringbuf.c:427
 #2: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: trace_call_bpf+0xbc/0x8a0

stack backtrace:
CPU: 1 UID: 0 PID: 6726 Comm: syz.1.295 Not tainted 6.12.0-rc4-syzkaller-00168-gd0b98f6a17a5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037
 check_deadlock kernel/locking/lockdep.c:3089 [inline]
 validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891
 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 __bpf_ringbuf_reserve+0x1ea/0x600 kernel/bpf/ringbuf.c:427
 ____bpf_ringbuf_output kernel/bpf/ringbuf.c:553 [inline]
 bpf_ringbuf_output+0x67/0x1e0 kernel/bpf/ringbuf.c:543
 bpf_prog_224b060aaa884769+0x47/0x4b
 bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 bpf_prog_run_array include/linux/bpf.h:2131 [inline]
 trace_call_bpf+0x369/0x8a0 kernel/trace/bpf_trace.c:146
 perf_trace_run_bpf_submit+0x82/0x180 kernel/events/core.c:10416
 perf_trace_lock+0x388/0x490 include/trace/events/lock.h:50
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x9cc/0xa30 kernel/locking/lockdep.c:5836
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
 __bpf_ringbuf_reserve+0x48a/0x600 kernel/bpf/ringbuf.c:465
 ____bpf_ringbuf_reserve kernel/bpf/ringbuf.c:478 [inline]
 bpf_ringbuf_reserve+0x5c/0x70 kernel/bpf/ringbuf.c:470
 bpf_prog_f93567782984e510+0x2e/0x48
 bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 bpf_prog_run_pin_on_cpu include/linux/filter.h:725 [inline]
 sk_psock_verdict_recv+0x2cd/0x590 net/core/skmsg.c:1200
 unix_stream_read_skb+0x13c/0x350 net/unix/af_unix.c:2750
 sk_psock_verdict_data_ready+0xab/0x390 net/core/skmsg.c:1224
 unix_stream_sendmsg+0x7d5/0xf80 net/unix/af_unix.c:2345
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607
 ___sys_sendmsg net/socket.c:2661 [inline]
 __sys_sendmsg+0x292/0x380 net/socket.c:2690
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ddef7e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5ddfc9a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5ddf135f80 RCX: 00007f5ddef7e719
RDX: 0000000000000000 RSI: 00000000200029c0 RDI: 0000000000000005
RBP: 00007f5ddeff132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5ddf135f80 R15: 00007ffd0d026fd8
 </TASK>