Warning: Permanently added '10.128.0.156' (ED25519) to the list of known hosts. executing program executing program syzkaller login: [ 59.278983][ T4169] [ 59.281343][ T4169] ============================================ [ 59.287482][ T4169] WARNING: possible recursive locking detected [ 59.293619][ T4169] 5.15.178-syzkaller #0 Not tainted [ 59.298804][ T4169] -------------------------------------------- [ 59.304940][ T4169] syz-executor362/4169 is trying to acquire lock: [ 59.311362][ T4169] ffff88807208adb8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 59.320270][ T4169] [ 59.320270][ T4169] but task is already holding lock: [ 59.327620][ T4169] ffff88807db5b5b8 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xcf/0xca0 [ 59.336488][ T4169] [ 59.336488][ T4169] other info that might help us debug this: [ 59.344535][ T4169] Possible unsafe locking scenario: [ 59.344535][ T4169] [ 59.351979][ T4169] CPU0 [ 59.355244][ T4169] ---- [ 59.358517][ T4169] lock(&trie->lock); [ 59.362587][ T4169] lock(&trie->lock); [ 59.366647][ T4169] [ 59.366647][ T4169] *** DEADLOCK *** [ 59.366647][ T4169] [ 59.374775][ T4169] May be due to missing lock nesting notation [ 59.374775][ T4169] [ 59.383079][ T4169] 3 locks held by syz-executor362/4169: [ 59.388609][ T4169] #0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 59.398114][ T4169] #1: ffff88807db5b5b8 (&trie->lock){....}-{2:2}, at: trie_update_elem+0xcf/0xca0 [ 59.407448][ T4169] #2: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 59.416776][ T4169] [ 59.416776][ T4169] stack backtrace: [ 59.422697][ T4169] CPU: 1 PID: 4169 Comm: syz-executor362 Not tainted 5.15.178-syzkaller #0 [ 59.431274][ T4169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 59.441330][ T4169] Call Trace: [ 59.444642][ T4169] [ 59.447573][ T4169] dump_stack_lvl+0x1e3/0x2d0 [ 59.452342][ T4169] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 59.458065][ T4169] ? panic+0x860/0x860 [ 59.462132][ T4169] validate_chain+0x46d2/0x5930 [ 59.466987][ T4169] ? reacquire_held_locks+0x660/0x660 [ 59.472353][ T4169] ? is_bpf_text_address+0x24f/0x260 [ 59.477730][ T4169] ? stack_trace_save+0x1c0/0x1c0 [ 59.482749][ T4169] ? __kernel_text_address+0x94/0x100 [ 59.488118][ T4169] ? unwind_get_return_address+0x49/0x80 [ 59.493755][ T4169] ? stack_trace_save+0x113/0x1c0 [ 59.498773][ T4169] ? mark_lock+0x98/0x340 [ 59.503097][ T4169] __lock_acquire+0x1295/0x1ff0 [ 59.507946][ T4169] lock_acquire+0x1db/0x4f0 [ 59.512441][ T4169] ? trie_delete_elem+0x90/0x690 [ 59.517374][ T4169] ? mark_lock+0x98/0x340 [ 59.521711][ T4169] ? read_lock_is_recursive+0x10/0x10 [ 59.527171][ T4169] ? __lock_acquire+0x1295/0x1ff0 [ 59.532212][ T4169] _raw_spin_lock_irqsave+0xd1/0x120 [ 59.537501][ T4169] ? trie_delete_elem+0x90/0x690 [ 59.542444][ T4169] ? _raw_spin_lock+0x40/0x40 [ 59.547120][ T4169] ? read_lock_is_recursive+0x10/0x10 [ 59.552494][ T4169] trie_delete_elem+0x90/0x690 [ 59.557254][ T4169] ? __cant_sleep+0x270/0x270 [ 59.561935][ T4169] bpf_prog_8c8ab8634bca3061+0x3a/0x520 [ 59.567474][ T4169] bpf_trace_run4+0x1ea/0x390 [ 59.572150][ T4169] ? bpf_trace_run3+0x380/0x380 [ 59.577000][ T4169] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 59.582469][ T4169] __alloc_pages+0x6e0/0x700 [ 59.587067][ T4169] ? __rmqueue_pcplist+0x23a0/0x23a0 [ 59.592352][ T4169] ? do_raw_spin_lock+0x14a/0x370 [ 59.597389][ T4169] kmalloc_large_node+0x7c/0x180 [ 59.602327][ T4169] ? _raw_spin_lock_irqsave+0xac/0x120 [ 59.607783][ T4169] __kmalloc_node+0x22d/0x390 [ 59.612451][ T4169] ? _raw_spin_lock_irqsave+0xdd/0x120 [ 59.617905][ T4169] ? _raw_spin_lock+0x40/0x40 [ 59.622575][ T4169] bpf_map_kmalloc_node+0xdb/0x160 [ 59.627777][ T4169] trie_update_elem+0x1d7/0xca0 [ 59.632626][ T4169] ? asm_exc_page_fault+0x22/0x30 [ 59.637649][ T4169] bpf_map_update_value+0x5d7/0x6c0 [ 59.642848][ T4169] map_update_elem+0x6a0/0x7c0 [ 59.647608][ T4169] __sys_bpf+0x2fd/0x670 [ 59.651853][ T4169] ? bpf_link_show_fdinfo+0x300/0x300 [ 59.657225][ T4169] ? syscall_enter_from_user_mode+0x2e/0x240 [ 59.663201][ T4169] ? lockdep_hardirqs_on+0x94/0x130 [ 59.668392][ T4169] __x64_sys_bpf+0x78/0x90 [ 59.672807][ T4169] do_syscall_64+0x3b/0xb0 [ 59.677220][ T4169] ? clear_bhb_loop+0x15/0x70 [ 59.681890][ T4169] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 59.687781][ T4169] RIP: 0033:0x7f21a940bda9 [ 59.692191][ T4169] 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 [ 59.711788][ T4169] RSP: 002b:00007ffcca3fb088 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 59.720198][ T4169] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f21a940bda9 executing program executing program executing program executing program [ 59.728163][ T4169] RDX: 0000000000000020 RSI: 0000000020000000 RDI: 0000000000000002 [ 59.736124][ T4169] RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 [ 59.744087][ T4169] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 59.752049][ T4169] R13: 00007ffcca3fb2a8 R14: 00007ffcca3fb0b0 R15: 00007ffcca3fb0a0 [ 59.760058][ T4169] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program