Warning: Permanently added '10.128.1.55' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program [ 69.992906][ T4265] [ 69.995314][ T4265] ============================================ [ 70.001459][ T4265] WARNING: possible recursive locking detected [ 70.007614][ T4265] 6.1.131-syzkaller #0 Not tainted [ 70.012812][ T4265] -------------------------------------------- [ 70.018961][ T4265] syz-executor275/4265 is trying to acquire lock: [ 70.025371][ T4265] ffff88802faeb238 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 70.034277][ T4265] [ 70.034277][ T4265] but task is already holding lock: [ 70.041635][ T4265] ffff88802faeba38 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xc6/0xdc0 [ 70.050533][ T4265] [ 70.050533][ T4265] other info that might help us debug this: [ 70.058590][ T4265] Possible unsafe locking scenario: [ 70.058590][ T4265] [ 70.066035][ T4265] CPU0 [ 70.069315][ T4265] ---- [ 70.072591][ T4265] lock(&trie->lock); [ 70.076658][ T4265] lock(&trie->lock); [ 70.080726][ T4265] [ 70.080726][ T4265] *** DEADLOCK *** [ 70.080726][ T4265] [ 70.088863][ T4265] May be due to missing lock nesting notation [ 70.088863][ T4265] [ 70.097176][ T4265] 3 locks held by syz-executor275/4265: [ 70.102717][ T4265] #0: ffffffff8d32e6c0 (rcu_read_lock){....}-{1:2}, at: bpf_map_update_value+0x207/0x6f0 [ 70.112657][ T4265] #1: ffff88802faeba38 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xc6/0xdc0 [ 70.121974][ T4265] #2: ffffffff8d32e6c0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 [ 70.131385][ T4265] [ 70.131385][ T4265] stack backtrace: [ 70.137278][ T4265] CPU: 0 PID: 4265 Comm: syz-executor275 Not tainted 6.1.131-syzkaller #0 [ 70.145781][ T4265] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 70.155844][ T4265] Call Trace: [ 70.159123][ T4265] [ 70.162064][ T4265] dump_stack_lvl+0x1e3/0x2cb [ 70.166750][ T4265] ? nf_tcp_handle_invalid+0x647/0x647 [ 70.172215][ T4265] ? panic+0x764/0x764 [ 70.176297][ T4265] validate_chain+0x4711/0x5950 [ 70.181165][ T4265] ? reacquire_held_locks+0x660/0x660 [ 70.186534][ T4265] ? unwind_next_frame+0x1a3f/0x2220 [ 70.191825][ T4265] ? deref_stack_reg+0x17c/0x210 [ 70.196767][ T4265] ? reacquire_held_locks+0x660/0x660 [ 70.202142][ T4265] ? 0xffffffffa0001ae0 [ 70.206307][ T4265] ? 0xffffffffa0001ae0 [ 70.210474][ T4265] ? is_bpf_text_address+0x22/0x2a0 [ 70.215691][ T4265] ? is_bpf_text_address+0x289/0x2a0 [ 70.220978][ T4265] ? is_bpf_text_address+0x22/0x2a0 [ 70.226181][ T4265] ? stack_trace_save+0x1c0/0x1c0 [ 70.231237][ T4265] ? __kernel_text_address+0x9/0x40 [ 70.236445][ T4265] ? mark_lock+0x9a/0x340 [ 70.240775][ T4265] ? mark_lock+0x9a/0x340 [ 70.245105][ T4265] __lock_acquire+0x125b/0x1f80 [ 70.249973][ T4265] lock_acquire+0x1f8/0x5a0 [ 70.254490][ T4265] ? trie_delete_elem+0x90/0x690 [ 70.259429][ T4265] ? read_lock_is_recursive+0x10/0x10 [ 70.264811][ T4265] ? __lock_acquire+0x125b/0x1f80 [ 70.269850][ T4265] _raw_spin_lock_irqsave+0xd1/0x120 [ 70.275145][ T4265] ? trie_delete_elem+0x90/0x690 [ 70.280082][ T4265] ? _raw_spin_lock+0x40/0x40 [ 70.284760][ T4265] ? read_lock_is_recursive+0x10/0x10 [ 70.290169][ T4265] trie_delete_elem+0x90/0x690 [ 70.294944][ T4265] ? __cant_sleep+0x270/0x270 [ 70.299638][ T4265] bpf_prog_8c8ab8634bca3061+0x3a/0x44 [ 70.305099][ T4265] ? bpf_trace_run4+0x16a/0x470 [ 70.309951][ T4265] bpf_trace_run4+0x253/0x470 [ 70.314633][ T4265] ? bpf_trace_run3+0x440/0x440 [ 70.319490][ T4265] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 70.324955][ T4265] __traceiter_mm_page_alloc+0x35/0x50 [ 70.330418][ T4265] __alloc_pages+0x717/0x770 [ 70.335014][ T4265] ? zone_statistics+0x160/0x160 [ 70.339963][ T4265] ? __rwlock_init+0x140/0x140 [ 70.344730][ T4265] __kmalloc_large_node+0x91/0x1d0 [ 70.349849][ T4265] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 70.355141][ T4265] __kmalloc_node+0x111/0x230 [ 70.359827][ T4265] bpf_map_kmalloc_node+0xce/0x1c0 [ 70.364951][ T4265] trie_update_elem+0x175/0xdc0 [ 70.369801][ T4265] ? exc_page_fault+0x1c0/0x620 [ 70.374658][ T4265] ? asm_exc_page_fault+0x22/0x30 [ 70.379692][ T4265] bpf_map_update_value+0x5cf/0x6f0 [ 70.384904][ T4265] map_update_elem+0x503/0x680 [ 70.389671][ T4265] __sys_bpf+0x337/0x6c0 [ 70.393915][ T4265] ? bpf_link_show_fdinfo+0x300/0x300 [ 70.399300][ T4265] ? print_irqtrace_events+0x210/0x210 [ 70.404781][ T4265] ? print_irqtrace_events+0x210/0x210 [ 70.410249][ T4265] ? syscall_enter_from_user_mode+0x2e/0x230 [ 70.416233][ T4265] ? lockdep_hardirqs_on+0x94/0x130 [ 70.421434][ T4265] __x64_sys_bpf+0x78/0x90 [ 70.425861][ T4265] do_syscall_64+0x3b/0xb0 [ 70.430277][ T4265] ? clear_bhb_loop+0x45/0xa0 [ 70.434961][ T4265] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 70.440858][ T4265] RIP: 0033:0x7f69b6512699 [ 70.445272][ T4265] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 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 b0 ff ff ff f7 d8 64 89 01 48 [ 70.464889][ T4265] RSP: 002b:00007f69b64d3218 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 70.473304][ T4265] RAX: ffffffffffffffda RBX: 00007f69b659c328 RCX: 00007f69b6512699 [ 70.481278][ T4265] RDX: 0000000000000020 RSI: 0000400000000000 RDI: 0000000000000002 executing program executing program executing program executing program executing program executing program executing program [ 70.489253][ T4265] RBP: 00007f69b659c320 R08: 0000000000000000 R09: 0000000000000000 [ 70.497223][ T4265] R10: 0000000000000000 R11: 0000000000000246 R12: 00004000000002c0 [ 70.505193][ T4265] R13: 00004000000002d4 R14: 0000400000000208 R15: 0000400000000000 [ 70.513172][ T4265] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program