Warning: Permanently added '10.128.1.139' (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 [ 73.206932][ T4259] [ 73.209290][ T4259] ============================================ [ 73.215627][ T4259] WARNING: possible recursive locking detected [ 73.221767][ T4259] 6.1.131-syzkaller #0 Not tainted [ 73.226878][ T4259] -------------------------------------------- [ 73.233011][ T4259] syz-executor257/4259 is trying to acquire lock: [ 73.239412][ T4259] ffff888031992a38 (&trie->lock){..-.}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 73.248321][ T4259] [ 73.248321][ T4259] but task is already holding lock: [ 73.255771][ T4259] ffff888031993238 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc6/0xdc0 [ 73.264755][ T4259] [ 73.264755][ T4259] other info that might help us debug this: [ 73.272814][ T4259] Possible unsafe locking scenario: [ 73.272814][ T4259] [ 73.280286][ T4259] CPU0 [ 73.283562][ T4259] ---- [ 73.286886][ T4259] lock(&trie->lock); [ 73.290957][ T4259] lock(&trie->lock); [ 73.295057][ T4259] [ 73.295057][ T4259] *** DEADLOCK *** [ 73.295057][ T4259] [ 73.303197][ T4259] May be due to missing lock nesting notation [ 73.303197][ T4259] [ 73.311508][ T4259] 3 locks held by syz-executor257/4259: [ 73.317067][ T4259] #0: ffffffff8d32e6c0 (rcu_read_lock){....}-{1:2}, at: bpf_map_update_value+0x207/0x6f0 [ 73.327007][ T4259] #1: ffff888031993238 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc6/0xdc0 [ 73.336322][ T4259] #2: ffffffff8d32e6c0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 [ 73.345748][ T4259] [ 73.345748][ T4259] stack backtrace: [ 73.351643][ T4259] CPU: 1 PID: 4259 Comm: syz-executor257 Not tainted 6.1.131-syzkaller #0 [ 73.360141][ T4259] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 73.370197][ T4259] Call Trace: [ 73.373474][ T4259] [ 73.376403][ T4259] dump_stack_lvl+0x1e3/0x2cb [ 73.381087][ T4259] ? nf_tcp_handle_invalid+0x647/0x647 [ 73.386572][ T4259] ? panic+0x764/0x764 [ 73.390662][ T4259] validate_chain+0x4711/0x5950 [ 73.395512][ T4259] ? mark_lock+0x9a/0x340 [ 73.399846][ T4259] ? reacquire_held_locks+0x660/0x660 [ 73.405216][ T4259] ? reacquire_held_locks+0x660/0x660 [ 73.410589][ T4259] ? __stack_depot_save+0x3f5/0x470 [ 73.415790][ T4259] ? __lock_acquire+0x1f80/0x1f80 [ 73.420822][ T4259] ? mark_lock+0x9a/0x340 [ 73.425153][ T4259] ? mark_lock+0x9a/0x340 [ 73.429482][ T4259] __lock_acquire+0x125b/0x1f80 [ 73.434361][ T4259] lock_acquire+0x1f8/0x5a0 [ 73.438883][ T4259] ? trie_delete_elem+0x90/0x690 [ 73.443818][ T4259] ? read_lock_is_recursive+0x10/0x10 [ 73.449218][ T4259] ? __lock_acquire+0x125b/0x1f80 [ 73.454275][ T4259] _raw_spin_lock_irqsave+0xd1/0x120 [ 73.459560][ T4259] ? trie_delete_elem+0x90/0x690 [ 73.464496][ T4259] ? _raw_spin_lock+0x40/0x40 [ 73.469181][ T4259] ? read_lock_is_recursive+0x10/0x10 [ 73.474568][ T4259] trie_delete_elem+0x90/0x690 [ 73.479329][ T4259] ? __cant_sleep+0x270/0x270 [ 73.484012][ T4259] bpf_prog_d46ba5bef82912c0+0x3d/0x41 [ 73.489479][ T4259] ? bpf_trace_run4+0x16a/0x470 [ 73.494332][ T4259] bpf_trace_run4+0x253/0x470 [ 73.499014][ T4259] ? bpf_trace_run3+0x440/0x440 [ 73.503879][ T4259] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 73.509349][ T4259] __traceiter_mm_page_alloc+0x35/0x50 [ 73.514811][ T4259] __alloc_pages+0x717/0x770 [ 73.519407][ T4259] ? zone_statistics+0x160/0x160 [ 73.524457][ T4259] ? ___slab_alloc+0x20d/0x1270 [ 73.529323][ T4259] alloc_slab_page+0x6a/0x150 [ 73.534034][ T4259] new_slab+0x84/0x2d0 [ 73.538119][ T4259] ___slab_alloc+0xc20/0x1270 [ 73.542804][ T4259] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 73.548112][ T4259] __kmem_cache_alloc_node+0x19f/0x260 [ 73.553582][ T4259] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 73.558888][ T4259] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 73.564186][ T4259] __kmalloc_node+0xa2/0x230 [ 73.568789][ T4259] ? _raw_spin_lock+0x40/0x40 [ 73.573471][ T4259] bpf_map_kmalloc_node+0xce/0x1c0 [ 73.578595][ T4259] trie_update_elem+0x175/0xdc0 [ 73.583458][ T4259] bpf_map_update_value+0x5cf/0x6f0 [ 73.588670][ T4259] generic_map_update_batch+0x579/0x920 [ 73.594234][ T4259] ? rcu_read_unlock+0xa0/0xa0 [ 73.599014][ T4259] ? __fdget+0x14e/0x210 [ 73.603266][ T4259] ? rcu_read_unlock+0xa0/0xa0 [ 73.608037][ T4259] bpf_map_do_batch+0x4d0/0x620 [ 73.612899][ T4259] __sys_bpf+0x658/0x6c0 [ 73.617154][ T4259] ? bpf_link_show_fdinfo+0x300/0x300 [ 73.622532][ T4259] ? print_irqtrace_events+0x210/0x210 [ 73.628008][ T4259] ? syscall_enter_from_user_mode+0x2e/0x230 [ 73.634003][ T4259] ? lockdep_hardirqs_on+0x94/0x130 [ 73.639208][ T4259] __x64_sys_bpf+0x78/0x90 [ 73.643635][ T4259] do_syscall_64+0x3b/0xb0 [ 73.648051][ T4259] ? clear_bhb_loop+0x45/0xa0 [ 73.652741][ T4259] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 73.658640][ T4259] RIP: 0033:0x7f220fda0ee9 [ 73.663063][ T4259] 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 [ 73.682791][ T4259] RSP: 002b:00007ffd7741c748 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 73.691237][ T4259] RAX: ffffffffffffffda RBX: 00004000000000c0 RCX: 00007f220fda0ee9 [ 73.699227][ T4259] RDX: 0000000000000038 RSI: 0000400000000240 RDI: 000000000000001a executing program executing program executing program executing program [ 73.707216][ T4259] RBP: 0000400000000440 R08: 0000000000000000 R09: 00000000000000a0 [ 73.715193][ T4259] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 73.723166][ T4259] R13: 0000400000000240 R14: 00004000000000c8 R15: 0000400000000240 [ 73.731177][ T4259] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program