Warning: Permanently added '10.128.1.171' (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 [ 50.689312][ T3576] [ 50.691670][ T3576] ============================================ [ 50.697813][ T3576] WARNING: possible recursive locking detected [ 50.703943][ T3576] 6.1.90-syzkaller #0 Not tainted [ 50.708961][ T3576] -------------------------------------------- [ 50.715084][ T3576] syz-executor351/3576 is trying to acquire lock: [ 50.721485][ T3576] ffff88807f6d3a38 (&trie->lock){-.-.}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 50.730348][ T3576] [ 50.730348][ T3576] but task is already holding lock: [ 50.737693][ T3576] ffff88807f6d1238 (&trie->lock){-.-.}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 50.746534][ T3576] [ 50.746534][ T3576] other info that might help us debug this: [ 50.754568][ T3576] Possible unsafe locking scenario: [ 50.754568][ T3576] [ 50.761992][ T3576] CPU0 [ 50.765247][ T3576] ---- [ 50.768502][ T3576] lock(&trie->lock); [ 50.772550][ T3576] lock(&trie->lock); [ 50.777029][ T3576] [ 50.777029][ T3576] *** DEADLOCK *** [ 50.777029][ T3576] [ 50.785164][ T3576] May be due to missing lock nesting notation [ 50.785164][ T3576] [ 50.793461][ T3576] 4 locks held by syz-executor351/3576: [ 50.798986][ T3576] #0: ffff88807ded4f78 (&tsk->futex_exit_mutex){+.+.}-{3:3}, at: futex_exit_release+0x30/0x1e0 [ 50.809407][ T3576] #1: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 50.818782][ T3576] #2: ffff88807f6d1238 (&trie->lock){-.-.}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 50.828062][ T3576] #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 50.837424][ T3576] [ 50.837424][ T3576] stack backtrace: [ 50.843287][ T3576] CPU: 1 PID: 3576 Comm: syz-executor351 Not tainted 6.1.90-syzkaller #0 [ 50.851685][ T3576] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 50.861717][ T3576] Call Trace: [ 50.864974][ T3576] [ 50.867887][ T3576] dump_stack_lvl+0x1e3/0x2cb [ 50.872580][ T3576] ? nf_tcp_handle_invalid+0x642/0x642 [ 50.878034][ T3576] ? panic+0x764/0x764 [ 50.882098][ T3576] validate_chain+0x4711/0x5950 [ 50.886932][ T3576] ? trace_sched_overutilized_tp+0x61/0x1a0 [ 50.892809][ T3576] ? reacquire_held_locks+0x660/0x660 [ 50.898160][ T3576] ? __lock_acquire+0x125b/0x1f80 [ 50.903184][ T3576] ? mark_lock+0x9a/0x340 [ 50.907492][ T3576] __lock_acquire+0x125b/0x1f80 [ 50.912324][ T3576] lock_acquire+0x1f8/0x5a0 [ 50.916806][ T3576] ? trie_delete_elem+0x90/0x690 [ 50.921721][ T3576] ? is_bpf_text_address+0x289/0x2a0 [ 50.926997][ T3576] ? read_lock_is_recursive+0x10/0x10 [ 50.932369][ T3576] ? __lock_acquire+0x125b/0x1f80 [ 50.937372][ T3576] _raw_spin_lock_irqsave+0xd1/0x120 [ 50.942637][ T3576] ? trie_delete_elem+0x90/0x690 [ 50.947553][ T3576] ? _raw_spin_lock+0x40/0x40 [ 50.952204][ T3576] ? read_lock_is_recursive+0x10/0x10 [ 50.957574][ T3576] trie_delete_elem+0x90/0x690 [ 50.962316][ T3576] ? __cant_sleep+0x270/0x270 [ 50.966987][ T3576] bpf_prog_fdee3c9a1e8a2a6e+0x3d/0x41 [ 50.972424][ T3576] bpf_trace_run2+0x1fd/0x410 [ 50.977080][ T3576] ? bpf_trace_run2+0x110/0x410 [ 50.981910][ T3576] ? bpf_trace_run1+0x3d0/0x3d0 [ 50.986751][ T3576] ? validate_chain+0x112/0x5950 [ 50.991665][ T3576] ? __bpf_trace_contention_begin+0x10/0x10 [ 50.997533][ T3576] __traceiter_contention_end+0x74/0xa0 [ 51.003061][ T3576] trace_contention_end+0x14c/0x190 [ 51.008235][ T3576] __pv_queued_spin_lock_slowpath+0x935/0xc50 [ 51.014282][ T3576] ? __pv_queued_spin_unlock_slowpath+0x2e0/0x2e0 [ 51.020679][ T3576] queued_spin_lock_slowpath+0x42/0x50 [ 51.026132][ T3576] do_raw_spin_lock+0x269/0x370 [ 51.031001][ T3576] ? __rwlock_init+0x140/0x140 [ 51.035742][ T3576] ? _raw_spin_lock_irqsave+0xac/0x120 [ 51.041188][ T3576] _raw_spin_lock_irqsave+0xdd/0x120 [ 51.046458][ T3576] ? _raw_spin_lock+0x40/0x40 [ 51.051119][ T3576] ? read_lock_is_recursive+0x10/0x10 [ 51.056564][ T3576] trie_delete_elem+0x90/0x690 [ 51.061418][ T3576] ? __cant_sleep+0x270/0x270 [ 51.066105][ T3576] bpf_prog_fdee3c9a1e8a2a6e+0x3d/0x41 [ 51.071550][ T3576] bpf_trace_run2+0x1fd/0x410 [ 51.076224][ T3576] ? bpf_trace_run2+0x110/0x410 [ 51.081142][ T3576] ? bpf_trace_run1+0x3d0/0x3d0 [ 51.085980][ T3576] ? __mutex_trylock_common+0x17e/0x2e0 [ 51.091538][ T3576] ? __might_sleep+0xb0/0xb0 [ 51.096118][ T3576] ? __bpf_trace_contention_begin+0x10/0x10 [ 51.102007][ T3576] __traceiter_contention_end+0x74/0xa0 [ 51.107547][ T3576] trace_contention_end+0x12f/0x170 [ 51.112732][ T3576] __mutex_lock+0x2ed/0xd80 [ 51.117220][ T3576] ? acct_collect+0x63e/0x7f0 [ 51.121902][ T3576] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 51.127868][ T3576] ? futex_exit_release+0x30/0x1e0 [ 51.132962][ T3576] ? print_irqtrace_events+0x210/0x210 [ 51.138402][ T3576] ? mutex_lock_nested+0x10/0x10 [ 51.143320][ T3576] ? _raw_spin_unlock_irq+0x1f/0x40 [ 51.148498][ T3576] ? lockdep_hardirqs_on+0x94/0x130 [ 51.153679][ T3576] ? _raw_spin_unlock_irq+0x2a/0x40 [ 51.158854][ T3576] ? acct_collect+0x63e/0x7f0 [ 51.163511][ T3576] futex_exit_release+0x30/0x1e0 [ 51.168428][ T3576] exit_mm_release+0x16/0x30 [ 51.172995][ T3576] exit_mm+0xa9/0x300 [ 51.176954][ T3576] ? do_exit+0x26a0/0x26a0 [ 51.181347][ T3576] ? taskstats_exit+0x399/0x920 [ 51.186176][ T3576] ? tty_audit_exit+0x150/0x1f0 [ 51.191007][ T3576] do_exit+0x9f6/0x26a0 [ 51.195142][ T3576] ? put_task_struct+0x80/0x80 [ 51.199887][ T3576] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 51.205847][ T3576] ? print_irqtrace_events+0x210/0x210 [ 51.211300][ T3576] ? _raw_spin_unlock_irq+0x1f/0x40 [ 51.216491][ T3576] ? lockdep_hardirqs_on+0x94/0x130 [ 51.221673][ T3576] do_group_exit+0x202/0x2b0 [ 51.226262][ T3576] __x64_sys_exit_group+0x3b/0x40 [ 51.231273][ T3576] do_syscall_64+0x3b/0xb0 [ 51.235672][ T3576] ? clear_bhb_loop+0x45/0xa0 [ 51.240360][ T3576] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 51.246282][ T3576] RIP: 0033:0x7f5efbfc90f9 [ 51.250679][ T3576] Code: 90 49 c7 c0 b8 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 [ 51.270271][ T3576] RSP: 002b:00007ffc7d501308 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 51.278664][ T3576] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5efbfc90f9 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 51.286631][ T3576] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 51.294580][ T3576] RBP: 00007f5efc0442b0 R08: ffffffffffffffb8 R09: 00000000000000a0 [ 51.302528][ T3576] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5efc0442b0 [ 51.310476][ T3576] R13: 0000000000000000 R14: 00007f5efc044d20 R15: 00007f5efbf9a280 [ 51.318441][ T3576] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program