============================================
WARNING: possible recursive locking detected
6.12.0-syzkaller-10296-gaaf20f870da0 #0 Not tainted
--------------------------------------------
syz-executor231/5944 is trying to acquire lock:
ffff888035670200 (&trie->lock){....}-{3:3}, at: trie_delete_elem+0xb0/0x820 kernel/bpf/lpm_trie.c:462

but task is already holding lock:
ffff888035670a00 (&trie->lock){....}-{3:3}, at: trie_update_elem+0xc8/0xe00 kernel/bpf/lpm_trie.c:333

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

       CPU0
       ----
  lock(&trie->lock
);
  lock(
&trie->lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

3 locks held by syz-executor231/5944:
 #0: ffffffff8e1bba80
 (rcu_read_lock
){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
){....}-{1:3}, at: bpf_map_update_value+0x5da/0xce0 kernel/bpf/syscall.c:288
 #1: ffff888035670a00 (&trie->lock){....}-{3:3}, at: trie_update_elem+0xc8/0xe00 kernel/bpf/lpm_trie.c:333
 #2: ffffffff8e1bba80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff8e1bba80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8e1bba80 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2350 [inline]
 #2: ffffffff8e1bba80 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run4+0x1d6/0x5a0 kernel/trace/bpf_trace.c:2394

stack backtrace:
CPU: 0 UID: 0 PID: 5944 Comm: syz-executor231 Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_deadlock_bug+0x2e3/0x410 kernel/locking/lockdep.c:3037
 check_deadlock kernel/locking/lockdep.c:3089 [inline]
 validate_chain kernel/locking/lockdep.c:3891 [inline]
 __lock_acquire+0x2117/0x3c40 kernel/locking/lockdep.c:5226
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
 trie_delete_elem+0xb0/0x820 kernel/bpf/lpm_trie.c:462
 bpf_prog_2c29ac5cdc6b1842+0x43/0x47
 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2351 [inline]
 bpf_trace_run4+0x245/0x5a0 kernel/trace/bpf_trace.c:2394
 trace_mm_page_alloc include/trace/events/kmem.h:177 [inline]
 __alloc_pages_noprof+0x3a5/0x25a0 mm/page_alloc.c:4773
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 ___kmalloc_large_node+0x84/0x1b0 mm/slub.c:4228
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:4255
 __do_kmalloc_node mm/slub.c:4271 [inline]
 __kmalloc_node_noprof.cold+0x5/0x5f mm/slub.c:4289
 kmalloc_node_noprof include/linux/slab.h:928 [inline]
 bpf_map_kmalloc_node+0x98/0x4a0 kernel/bpf/syscall.c:511
 lpm_trie_node_alloc kernel/bpf/lpm_trie.c:299 [inline]
 trie_update_elem+0x1ef/0xe00 kernel/bpf/lpm_trie.c:342
 bpf_map_update_value+0x659/0xce0 kernel/bpf/syscall.c:289
 map_update_elem+0x606/0x8f0 kernel/bpf/syscall.c:1727
 __sys_bpf+0x14bb/0x49c0 kernel/bpf/syscall.c:5778
 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5895 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5895
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e56cf9829
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc2de7cc88 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffc2de7ce58 RCX: 00007f2e56cf9829
RDX: 0000000000000020 RSI: 0000000020000940 RDI: 0000000000000002
RBP: 00007f2e56d6c610 R08: 00007ffc2de7ce58 R09: 00007ffc2de7ce58
R10: 00007ffc2de7ce58 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc2de7ce48 R14: 0000000000000001 R15: 0000000000000001
 </TASK>