DUID 00:04:a7:d6:bd:5e:06:04:37:16:34:40:3a:bd:6c:34:91:c7 forked to background, child pid 3839 [ 40.041156][ T3840] 8021q: adding VLAN 0 to HW filter on device bond0 [ 40.056612][ T3840] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.10.35' (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 syzkaller login: [ 66.896175][ T4177] [ 66.898642][ T4177] ============================================ [ 66.904787][ T4177] WARNING: possible recursive locking detected [ 66.911087][ T4177] 5.15.176-syzkaller #0 Not tainted [ 66.916285][ T4177] -------------------------------------------- [ 66.922420][ T4177] syz-executor265/4177 is trying to acquire lock: [ 66.928912][ T4177] ffff88807d3691b8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 66.937808][ T4177] [ 66.937808][ T4177] but task is already holding lock: [ 66.945166][ T4177] ffff88807c31a1b8 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xcf/0xca0 [ 66.954126][ T4177] [ 66.954126][ T4177] other info that might help us debug this: [ 66.962562][ T4177] Possible unsafe locking scenario: [ 66.962562][ T4177] [ 66.970147][ T4177] CPU0 [ 66.973424][ T4177] ---- [ 66.976784][ T4177] lock(&trie->lock); [ 66.980934][ T4177] lock(&trie->lock); [ 66.985014][ T4177] [ 66.985014][ T4177] *** DEADLOCK *** [ 66.985014][ T4177] [ 66.993161][ T4177] May be due to missing lock nesting notation [ 66.993161][ T4177] [ 67.001490][ T4177] 3 locks held by syz-executor265/4177: [ 67.007056][ T4177] #0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 67.016373][ T4177] #1: ffff88807c31a1b8 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xcf/0xca0 [ 67.025708][ T4177] #2: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 67.035198][ T4177] [ 67.035198][ T4177] stack backtrace: [ 67.041108][ T4177] CPU: 0 PID: 4177 Comm: syz-executor265 Not tainted 5.15.176-syzkaller #0 [ 67.049705][ T4177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 67.059885][ T4177] Call Trace: [ 67.063161][ T4177] [ 67.066086][ T4177] dump_stack_lvl+0x1e3/0x2d0 [ 67.070860][ T4177] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 67.076488][ T4177] ? panic+0x860/0x860 [ 67.080557][ T4177] validate_chain+0x46d2/0x5930 [ 67.085414][ T4177] ? unwind_next_frame+0x1437/0x1fa0 [ 67.090787][ T4177] ? deref_stack_reg+0xbe/0x110 [ 67.095656][ T4177] ? reacquire_held_locks+0x660/0x660 [ 67.101054][ T4177] ? is_bpf_text_address+0x24f/0x260 [ 67.106367][ T4177] ? stack_trace_save+0x1c0/0x1c0 [ 67.111503][ T4177] ? unwind_get_return_address+0x49/0x80 [ 67.117140][ T4177] ? mark_lock+0x98/0x340 [ 67.121465][ T4177] __lock_acquire+0x1295/0x1ff0 [ 67.126331][ T4177] lock_acquire+0x1db/0x4f0 [ 67.131002][ T4177] ? trie_delete_elem+0x90/0x690 [ 67.135945][ T4177] ? mark_lock+0x98/0x340 [ 67.140270][ T4177] ? read_lock_is_recursive+0x10/0x10 [ 67.145642][ T4177] ? __lock_acquire+0x1295/0x1ff0 [ 67.150677][ T4177] _raw_spin_lock_irqsave+0xd1/0x120 [ 67.155965][ T4177] ? trie_delete_elem+0x90/0x690 [ 67.161018][ T4177] ? _raw_spin_lock+0x40/0x40 [ 67.165883][ T4177] ? read_lock_is_recursive+0x10/0x10 [ 67.171338][ T4177] trie_delete_elem+0x90/0x690 [ 67.176099][ T4177] ? __cant_sleep+0x270/0x270 [ 67.180774][ T4177] bpf_prog_8c8ab8634bca3061+0x3a/0x970 [ 67.186312][ T4177] bpf_trace_run4+0x1ea/0x390 [ 67.191007][ T4177] ? bpf_trace_run3+0x380/0x380 [ 67.195883][ T4177] ? __alloc_pages+0x700/0x700 [ 67.200753][ T4177] ? __lock_acquire+0x1295/0x1ff0 [ 67.205790][ T4177] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 67.211353][ T4177] __traceiter_mm_page_alloc+0x35/0x50 [ 67.216841][ T4177] __alloc_pages+0x6e0/0x700 [ 67.221455][ T4177] ? __rmqueue_pcplist+0x23a0/0x23a0 [ 67.226768][ T4177] ? do_raw_spin_lock+0x14a/0x370 [ 67.231832][ T4177] kmalloc_large_node+0x7c/0x180 [ 67.236808][ T4177] ? _raw_spin_lock_irqsave+0xac/0x120 [ 67.242272][ T4177] __kmalloc_node+0x22d/0x390 [ 67.246946][ T4177] ? _raw_spin_lock_irqsave+0xdd/0x120 [ 67.252404][ T4177] ? _raw_spin_lock+0x40/0x40 [ 67.257086][ T4177] bpf_map_kmalloc_node+0xdb/0x160 [ 67.262196][ T4177] trie_update_elem+0x1d7/0xca0 [ 67.267045][ T4177] ? asm_exc_page_fault+0x22/0x30 [ 67.272068][ T4177] bpf_map_update_value+0x5d7/0x6c0 [ 67.277264][ T4177] map_update_elem+0x6a0/0x7c0 [ 67.282019][ T4177] __sys_bpf+0x2fd/0x670 [ 67.286256][ T4177] ? bpf_link_show_fdinfo+0x300/0x300 [ 67.291631][ T4177] ? syscall_enter_from_user_mode+0x2e/0x240 [ 67.297606][ T4177] ? lockdep_hardirqs_on+0x94/0x130 [ 67.302796][ T4177] __x64_sys_bpf+0x78/0x90 [ 67.307206][ T4177] do_syscall_64+0x3b/0xb0 [ 67.311610][ T4177] ? clear_bhb_loop+0x15/0x70 [ 67.316278][ T4177] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 67.322168][ T4177] RIP: 0033:0x7ff265391da9 [ 67.326577][ T4177] 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 [ 67.346173][ T4177] RSP: 002b:00007ffd22fe3b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 67.354587][ T4177] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff265391da9 [ 67.362554][ T4177] RDX: 0000000000000020 RSI: 0000000020000000 RDI: 0000000000000002 [ 67.370522][ T4177] RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 [ 67.378494][ T4177] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000104e6 [ 67.386459][ T4177] R13: 00007ffd22fe3b2c R14: 00007ffd22fe3b40 R15: 00007ffd22fe3b30 [ 67.394468][ T4177] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program