Warning: Permanently added '10.128.0.204' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 73.001467][ T4257] [ 73.003839][ T4257] ============================================ [ 73.010006][ T4257] WARNING: possible recursive locking detected [ 73.016155][ T4257] 6.1.130-syzkaller #0 Not tainted [ 73.021257][ T4257] -------------------------------------------- [ 73.027397][ T4257] syz-executor265/4257 is trying to acquire lock: [ 73.033810][ T4257] ffff88807bb67a38 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 73.042722][ T4257] [ 73.042722][ T4257] but task is already holding lock: [ 73.050092][ T4257] ffff888077ac9238 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xc6/0xdc0 [ 73.058977][ T4257] [ 73.058977][ T4257] other info that might help us debug this: [ 73.067032][ T4257] Possible unsafe locking scenario: [ 73.067032][ T4257] [ 73.074496][ T4257] CPU0 [ 73.077765][ T4257] ---- [ 73.081033][ T4257] lock(&trie->lock); [ 73.085102][ T4257] lock(&trie->lock); [ 73.089166][ T4257] [ 73.089166][ T4257] *** DEADLOCK *** [ 73.089166][ T4257] [ 73.097302][ T4257] May be due to missing lock nesting notation [ 73.097302][ T4257] [ 73.105615][ T4257] 3 locks held by syz-executor265/4257: [ 73.111238][ T4257] #0: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: bpf_map_update_value+0x207/0x6f0 [ 73.121172][ T4257] #1: ffff888077ac9238 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xc6/0xdc0 [ 73.130504][ T4257] #2: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 [ 73.139908][ T4257] [ 73.139908][ T4257] stack backtrace: [ 73.145801][ T4257] CPU: 0 PID: 4257 Comm: syz-executor265 Not tainted 6.1.130-syzkaller #0 [ 73.154301][ T4257] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 73.164361][ T4257] Call Trace: [ 73.167642][ T4257] [ 73.170576][ T4257] dump_stack_lvl+0x1e3/0x2cb [ 73.175282][ T4257] ? nf_tcp_handle_invalid+0x647/0x647 [ 73.180742][ T4257] ? panic+0x764/0x764 [ 73.184817][ T4257] validate_chain+0x4711/0x5950 [ 73.189671][ T4257] ? mark_lock+0x9a/0x340 [ 73.194001][ T4257] ? reacquire_held_locks+0x660/0x660 [ 73.199371][ T4257] ? reacquire_held_locks+0x660/0x660 [ 73.204748][ T4257] ? __stack_depot_save+0x3f5/0x470 [ 73.209958][ T4257] ? __lock_acquire+0x1f80/0x1f80 [ 73.215006][ T4257] ? mark_lock+0x9a/0x340 [ 73.219345][ T4257] ? mark_lock+0x9a/0x340 [ 73.223701][ T4257] __lock_acquire+0x125b/0x1f80 [ 73.228581][ T4257] lock_acquire+0x1f8/0x5a0 [ 73.233097][ T4257] ? trie_delete_elem+0x90/0x690 [ 73.238038][ T4257] ? read_lock_is_recursive+0x10/0x10 [ 73.243417][ T4257] ? __lock_acquire+0x125b/0x1f80 [ 73.248456][ T4257] _raw_spin_lock_irqsave+0xd1/0x120 [ 73.253747][ T4257] ? trie_delete_elem+0x90/0x690 [ 73.258699][ T4257] ? _raw_spin_lock+0x40/0x40 [ 73.263384][ T4257] ? read_lock_is_recursive+0x10/0x10 [ 73.268774][ T4257] trie_delete_elem+0x90/0x690 [ 73.273537][ T4257] ? __cant_sleep+0x270/0x270 [ 73.278216][ T4257] ? 0xffffffffa00020ac [ 73.282376][ T4257] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 73.287847][ T4257] ? bpf_trace_run4+0x16a/0x470 [ 73.292728][ T4257] bpf_trace_run4+0x253/0x470 [ 73.297428][ T4257] ? bpf_trace_run3+0x440/0x440 [ 73.302341][ T4257] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 73.307828][ T4257] __traceiter_mm_page_alloc+0x35/0x50 [ 73.313299][ T4257] __alloc_pages+0x717/0x770 [ 73.317927][ T4257] ? zone_statistics+0x160/0x160 [ 73.322876][ T4257] ? ___slab_alloc+0x20d/0x1270 [ 73.327735][ T4257] ? do_syscall_64+0x3b/0xb0 [ 73.332327][ T4257] alloc_slab_page+0x6a/0x150 [ 73.337026][ T4257] new_slab+0x84/0x2d0 [ 73.341110][ T4257] ___slab_alloc+0xc20/0x1270 [ 73.345797][ T4257] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 73.351101][ T4257] __kmem_cache_alloc_node+0x19f/0x260 [ 73.356571][ T4257] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 73.361869][ T4257] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 73.367159][ T4257] __kmalloc_node+0xa2/0x230 [ 73.371813][ T4257] ? _raw_spin_lock+0x40/0x40 [ 73.376519][ T4257] bpf_map_kmalloc_node+0xce/0x1c0 [ 73.381645][ T4257] trie_update_elem+0xa13/0xdc0 [ 73.386521][ T4257] bpf_map_update_value+0x5cf/0x6f0 [ 73.391757][ T4257] generic_map_update_batch+0x579/0x920 [ 73.397598][ T4257] ? rcu_read_unlock+0xa0/0xa0 [ 73.402392][ T4257] ? __fdget+0x14e/0x210 [ 73.406653][ T4257] ? rcu_read_unlock+0xa0/0xa0 [ 73.411440][ T4257] bpf_map_do_batch+0x4d0/0x620 [ 73.416301][ T4257] __sys_bpf+0x658/0x6c0 [ 73.420564][ T4257] ? bpf_link_show_fdinfo+0x300/0x300 [ 73.426027][ T4257] ? print_irqtrace_events+0x210/0x210 [ 73.431494][ T4257] ? syscall_enter_from_user_mode+0x2e/0x230 [ 73.437475][ T4257] ? lockdep_hardirqs_on+0x94/0x130 [ 73.442686][ T4257] __x64_sys_bpf+0x78/0x90 [ 73.447108][ T4257] do_syscall_64+0x3b/0xb0 [ 73.451521][ T4257] ? clear_bhb_loop+0x45/0xa0 [ 73.456213][ T4257] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 73.462120][ T4257] RIP: 0033:0x7f5678488f69 [ 73.466541][ T4257] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 [ 73.486170][ T4257] RSP: 002b:00007ffec1265518 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 73.494605][ T4257] RAX: ffffffffffffffda RBX: 00004000000000c0 RCX: 00007f5678488f69 executing program executing program executing program executing program [ 73.502620][ T4257] RDX: 0000000000000038 RSI: 0000400000000240 RDI: 000000000000001a [ 73.510605][ T4257] RBP: 0000000000000000 R08: 00000000000000a0 R09: 00000000000000a0 [ 73.518573][ T4257] R10: 0000000000000000 R11: 0000000000000246 R12: 00004000000000c8 [ 73.526544][ T4257] R13: 0000400000000440 R14: 00004000000003c8 R15: 656c6c616b7a7973 [ 73.534526][ T4257] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program