Warning: Permanently added '10.128.0.67' (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 [ 51.101258][ T3616] [ 51.103606][ T3616] ============================================ [ 51.109730][ T3616] WARNING: possible recursive locking detected [ 51.115852][ T3616] 6.1.85-syzkaller #0 Not tainted [ 51.120858][ T3616] -------------------------------------------- [ 51.126982][ T3616] syz-executor329/3616 is trying to acquire lock: [ 51.133372][ T3616] ffff88807a738240 (&stab->lock){+...}-{2:2}, at: sock_map_delete_elem+0x161/0x230 [ 51.142670][ T3616] [ 51.142670][ T3616] but task is already holding lock: [ 51.150013][ T3616] ffff888076f06240 (&stab->lock){+...}-{2:2}, at: sock_map_delete_elem+0x161/0x230 [ 51.159311][ T3616] [ 51.159311][ T3616] other info that might help us debug this: [ 51.167348][ T3616] Possible unsafe locking scenario: [ 51.167348][ T3616] [ 51.174775][ T3616] CPU0 [ 51.178034][ T3616] ---- [ 51.181302][ T3616] lock(&stab->lock); [ 51.185346][ T3616] lock(&stab->lock); [ 51.189392][ T3616] [ 51.189392][ T3616] *** DEADLOCK *** [ 51.189392][ T3616] [ 51.197509][ T3616] May be due to missing lock nesting notation [ 51.197509][ T3616] [ 51.205803][ T3616] 4 locks held by syz-executor329/3616: [ 51.211322][ T3616] #0: ffff8880772b14a0 (&child->perf_event_mutex){+.+.}-{3:3}, at: perf_event_exit_task+0xa3/0xb30 [ 51.222080][ T3616] #1: ffffffff8d12ac40 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 51.231446][ T3616] #2: ffff888076f06240 (&stab->lock){+...}-{2:2}, at: sock_map_delete_elem+0x161/0x230 [ 51.241162][ T3616] #3: ffffffff8d12ac40 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 51.250527][ T3616] [ 51.250527][ T3616] stack backtrace: [ 51.256393][ T3616] CPU: 0 PID: 3616 Comm: syz-executor329 Not tainted 6.1.85-syzkaller #0 [ 51.264793][ T3616] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 51.274832][ T3616] Call Trace: [ 51.278095][ T3616] [ 51.281008][ T3616] dump_stack_lvl+0x1e3/0x2cb [ 51.285677][ T3616] ? nf_tcp_handle_invalid+0x642/0x642 [ 51.291116][ T3616] ? panic+0x75d/0x75d [ 51.295160][ T3616] validate_chain+0x4711/0x5950 [ 51.299997][ T3616] ? preempt_count_add+0x8f/0x180 [ 51.305010][ T3616] ? reacquire_held_locks+0x660/0x660 [ 51.310367][ T3616] ? validate_chain+0x112/0x5950 [ 51.315291][ T3616] ? reacquire_held_locks+0x660/0x660 [ 51.320647][ T3616] ? validate_chain+0x112/0x5950 [ 51.325571][ T3616] ? reacquire_held_locks+0x660/0x660 [ 51.330925][ T3616] ? reacquire_held_locks+0x660/0x660 [ 51.336274][ T3616] ? mark_lock+0x9a/0x340 [ 51.340586][ T3616] __lock_acquire+0x125b/0x1f80 [ 51.345424][ T3616] lock_acquire+0x1f8/0x5a0 [ 51.349906][ T3616] ? sock_map_delete_elem+0x161/0x230 [ 51.355262][ T3616] ? read_lock_is_recursive+0x10/0x10 [ 51.360617][ T3616] ? sock_map_delete_elem+0x161/0x230 [ 51.365972][ T3616] ? __bpf_trace_softirq+0x10/0x10 [ 51.371066][ T3616] ? sock_map_delete_elem+0x161/0x230 [ 51.376415][ T3616] _raw_spin_lock_bh+0x31/0x40 [ 51.381157][ T3616] ? sock_map_delete_elem+0x161/0x230 [ 51.386514][ T3616] sock_map_delete_elem+0x161/0x230 [ 51.391694][ T3616] ? sock_map_update_elem+0x500/0x500 [ 51.397046][ T3616] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 51.402481][ T3616] bpf_trace_run2+0x1fd/0x410 [ 51.407138][ T3616] ? bpf_trace_run2+0x110/0x410 [ 51.411964][ T3616] ? bpf_trace_run1+0x3d0/0x3d0 [ 51.416789][ T3616] ? mark_lock+0x9a/0x340 [ 51.421097][ T3616] ? __bpf_trace_contention_begin+0x10/0x10 [ 51.426966][ T3616] __traceiter_contention_end+0x74/0xa0 [ 51.432497][ T3616] trace_contention_end+0x14c/0x190 [ 51.437671][ T3616] __pv_queued_spin_lock_slowpath+0x935/0xc50 [ 51.443716][ T3616] ? __pv_queued_spin_unlock_slowpath+0x2e0/0x2e0 [ 51.450112][ T3616] queued_spin_lock_slowpath+0x42/0x50 [ 51.455554][ T3616] do_raw_spin_lock+0x269/0x370 [ 51.460384][ T3616] ? __bpf_trace_softirq+0x10/0x10 [ 51.465481][ T3616] ? __rwlock_init+0x140/0x140 [ 51.470230][ T3616] ? sock_map_delete_elem+0x161/0x230 [ 51.475588][ T3616] sock_map_delete_elem+0x161/0x230 [ 51.480764][ T3616] ? sock_map_update_elem+0x500/0x500 [ 51.486117][ T3616] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 51.491555][ T3616] bpf_trace_run2+0x1fd/0x410 [ 51.496206][ T3616] ? bpf_trace_run2+0x110/0x410 [ 51.501035][ T3616] ? bpf_trace_run1+0x3d0/0x3d0 [ 51.505859][ T3616] ? __mutex_trylock_common+0x17e/0x2e0 [ 51.511382][ T3616] ? __might_sleep+0xb0/0xb0 [ 51.515949][ T3616] ? __bpf_trace_contention_begin+0x10/0x10 [ 51.521821][ T3616] __traceiter_contention_end+0x74/0xa0 [ 51.527347][ T3616] trace_contention_end+0x12f/0x170 [ 51.532523][ T3616] __mutex_lock+0x2ed/0xd80 [ 51.537005][ T3616] ? mark_lock+0x9a/0x340 [ 51.541313][ T3616] ? perf_event_exit_task+0xa3/0xb30 [ 51.546575][ T3616] ? mutex_lock_nested+0x10/0x10 [ 51.551499][ T3616] perf_event_exit_task+0xa3/0xb30 [ 51.556589][ T3616] ? perf_pmu_migrate_context+0xcd0/0xcd0 [ 51.562284][ T3616] ? __lock_acquire+0x1f80/0x1f80 [ 51.567285][ T3616] ? task_work_run+0x2bc/0x300 [ 51.572029][ T3616] ? task_work_cancel+0x2b0/0x2b0 [ 51.577028][ T3616] ? rcu_is_watching+0x11/0xb0 [ 51.581769][ T3616] do_exit+0xa83/0x26a0 [ 51.585905][ T3616] ? put_task_struct+0x80/0x80 [ 51.590649][ T3616] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 51.596616][ T3616] ? print_irqtrace_events+0x210/0x210 [ 51.602054][ T3616] ? _raw_spin_unlock_irq+0x1f/0x40 [ 51.607229][ T3616] ? lockdep_hardirqs_on+0x94/0x130 [ 51.612403][ T3616] do_group_exit+0x202/0x2b0 [ 51.616973][ T3616] __x64_sys_exit_group+0x3b/0x40 [ 51.621975][ T3616] do_syscall_64+0x3b/0xb0 [ 51.626370][ T3616] ? clear_bhb_loop+0x45/0xa0 [ 51.631024][ T3616] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 51.636898][ T3616] RIP: 0033:0x7f538885f939 [ 51.641296][ T3616] Code: Unable to access opcode bytes at 0x7f538885f90f. executing program executing program executing program executing program executing program [ 51.648285][ T3616] RSP: 002b:00007ffee2ceb318 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 51.656676][ T3616] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f538885f939 [ 51.664625][ T3616] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 51.672573][ T3616] RBP: 00007f53888eb2d0 R08: ffffffffffffffb0 R09: 0000000000000000 [ 51.680524][ T3616] R10: 00007ffee2ceb3a0 R11: 0000000000000246 R12: 00007f53888eb2d0 [ 51.688479][ T3616] R13: 0000000000000000 R14: 00007f53888ebe60 R15: 00007f538882d6b0 [ 51.696434][ T3616] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program