Warning: Permanently added '10.128.0.177' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 67.402352][ T4217] [ 67.404757][ T4217] ============================================ [ 67.410904][ T4217] WARNING: possible recursive locking detected [ 67.417065][ T4217] 5.15.185-syzkaller #0 Not tainted [ 67.422262][ T4217] -------------------------------------------- [ 67.428421][ T4217] syz-executor119/4217 is trying to acquire lock: [ 67.434837][ T4217] ffff888071f631b8 (&trie->lock){..-.}-{2:2}, at: trie_delete_elem+0x90/0x710 [ 67.443738][ T4217] [ 67.443738][ T4217] but task is already holding lock: [ 67.451111][ T4217] ffff88807d3865b8 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc7/0xc50 [ 67.460112][ T4217] [ 67.460112][ T4217] other info that might help us debug this: [ 67.468196][ T4217] Possible unsafe locking scenario: [ 67.468196][ T4217] [ 67.475671][ T4217] CPU0 [ 67.478956][ T4217] ---- [ 67.482247][ T4217] lock(&trie->lock); [ 67.486323][ T4217] lock(&trie->lock); [ 67.490424][ T4217] [ 67.490424][ T4217] *** DEADLOCK *** [ 67.490424][ T4217] [ 67.498572][ T4217] May be due to missing lock nesting notation [ 67.498572][ T4217] [ 67.506926][ T4217] 3 locks held by syz-executor119/4217: [ 67.512474][ T4217] #0: ffffffff8c11bfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 67.521803][ T4217] #1: ffff88807d3865b8 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc7/0xc50 [ 67.531127][ T4217] #2: ffffffff8c11bfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 67.540446][ T4217] [ 67.540446][ T4217] stack backtrace: [ 67.546369][ T4217] CPU: 0 PID: 4217 Comm: syz-executor119 Not tainted 5.15.185-syzkaller #0 [ 67.554961][ T4217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 67.565040][ T4217] Call Trace: [ 67.568331][ T4217] [ 67.571283][ T4217] dump_stack_lvl+0x168/0x230 [ 67.575978][ T4217] ? show_regs_print_info+0x20/0x20 [ 67.581184][ T4217] ? load_image+0x3b0/0x3b0 [ 67.585700][ T4217] __lock_acquire+0x1227/0x7c60 [ 67.590569][ T4217] ? deref_stack_reg+0xd0/0x120 [ 67.595443][ T4217] ? is_bpf_text_address+0x254/0x270 [ 67.600753][ T4217] ? __lock_acquire+0x12d9/0x7c60 [ 67.605799][ T4217] ? verify_lock_unused+0x140/0x140 [ 67.611021][ T4217] ? stack_trace_save+0x98/0xe0 [ 67.615877][ T4217] ? stack_trace_snprint+0xf0/0xf0 [ 67.621002][ T4217] lock_acquire+0x197/0x3f0 [ 67.625522][ T4217] ? trie_delete_elem+0x90/0x710 [ 67.630562][ T4217] ? read_lock_is_recursive+0x10/0x10 [ 67.635961][ T4217] _raw_spin_lock_irqsave+0xa4/0xf0 [ 67.641176][ T4217] ? trie_delete_elem+0x90/0x710 [ 67.646126][ T4217] ? _raw_spin_lock+0x40/0x40 [ 67.650821][ T4217] trie_delete_elem+0x90/0x710 [ 67.655615][ T4217] bpf_prog_5186c38a4019a4cb+0x42/0x3fc [ 67.661176][ T4217] bpf_trace_run4+0x188/0x330 [ 67.665865][ T4217] ? verify_lock_unused+0x140/0x140 [ 67.671080][ T4217] ? bpf_trace_run3+0x320/0x320 [ 67.675942][ T4217] ? mark_lock+0x94/0x320 [ 67.680288][ T4217] __bpf_trace_mm_page_alloc+0xbf/0xf0 [ 67.685778][ T4217] __traceiter_mm_page_alloc+0x35/0x50 [ 67.691255][ T4217] __alloc_pages+0x449/0x470 [ 67.695854][ T4217] ? zone_statistics+0x170/0x170 [ 67.700807][ T4217] ? __lock_acquire+0x7c60/0x7c60 [ 67.705853][ T4217] new_slab+0xc0/0x4b0 [ 67.709959][ T4217] ___slab_alloc+0x81e/0xdf0 [ 67.714564][ T4217] ? bpf_map_kmalloc_node+0xba/0x140 [ 67.719884][ T4217] __kmalloc_node+0x200/0x3b0 [ 67.724579][ T4217] ? bpf_map_kmalloc_node+0xba/0x140 [ 67.729895][ T4217] ? _raw_spin_lock+0x40/0x40 [ 67.734599][ T4217] bpf_map_kmalloc_node+0xba/0x140 [ 67.739745][ T4217] trie_update_elem+0x1cc/0xc50 [ 67.744703][ T4217] ? __lock_acquire+0x7c60/0x7c60 [ 67.749743][ T4217] ? __might_sleep+0xf0/0xf0 [ 67.754353][ T4217] bpf_map_update_value+0x591/0x670 [ 67.759568][ T4217] generic_map_update_batch+0x525/0x7c0 [ 67.765156][ T4217] ? rcu_read_unlock+0x90/0x90 [ 67.769982][ T4217] ? __fdget+0x150/0x210 [ 67.774263][ T4217] ? rcu_read_unlock+0x90/0x90 [ 67.779054][ T4217] bpf_map_do_batch+0x466/0x600 [ 67.784042][ T4217] __sys_bpf+0x601/0x670 [ 67.788296][ T4217] ? bpf_link_show_fdinfo+0x310/0x310 [ 67.793726][ T4217] ? vtime_user_exit+0x2dc/0x400 [ 67.798825][ T4217] __x64_sys_bpf+0x78/0x90 [ 67.803276][ T4217] do_syscall_64+0x4c/0xa0 [ 67.807707][ T4217] ? clear_bhb_loop+0x30/0x80 [ 67.812393][ T4217] ? clear_bhb_loop+0x30/0x80 [ 67.817079][ T4217] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 67.823001][ T4217] RIP: 0033:0x7f26d11a7e69 [ 67.827426][ T4217] 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 executing program executing program executing program [ 67.847037][ T4217] RSP: 002b:00007ffff7607de8 EFLAGS: 00000202 ORIG_RAX: 0000000000000141 [ 67.855468][ T4217] RAX: ffffffffffffffda RBX: 0000200000000440 RCX: 00007f26d11a7e69 [ 67.863554][ T4217] RDX: 0000000000000038 RSI: 0000200000000240 RDI: 000000000000001a [ 67.871533][ T4217] RBP: 0000200000000240 R08: 0000000000000000 R09: 00000000000000a0 [ 67.879514][ T4217] R10: 0000000000000000 R11: 0000000000000202 R12: 00002000000000c0 [ 67.887509][ T4217] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 67.895497][ T4217] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program