Warning: Permanently added '10.128.0.171' (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 syzkaller login: [ 60.705251][ T3583] [ 60.707613][ T3583] ============================================ [ 60.713782][ T3583] WARNING: possible recursive locking detected [ 60.719944][ T3583] 6.1.85-syzkaller #0 Not tainted [ 60.724960][ T3583] -------------------------------------------- [ 60.731131][ T3583] syz-executor373/3583 is trying to acquire lock: [ 60.737540][ T3583] ffff8880731af240 (&stab->lock){+...}-{2:2}, at: sock_map_delete_elem+0x161/0x230 [ 60.746879][ T3583] [ 60.746879][ T3583] but task is already holding lock: [ 60.754246][ T3583] ffff88807e68a240 (&stab->lock){+...}-{2:2}, at: sock_map_delete_elem+0x161/0x230 [ 60.763571][ T3583] [ 60.763571][ T3583] other info that might help us debug this: [ 60.771625][ T3583] Possible unsafe locking scenario: [ 60.771625][ T3583] [ 60.779063][ T3583] CPU0 [ 60.782355][ T3583] ---- [ 60.785628][ T3583] lock(&stab->lock); [ 60.789690][ T3583] lock(&stab->lock); [ 60.793754][ T3583] [ 60.793754][ T3583] *** DEADLOCK *** [ 60.793754][ T3583] [ 60.801890][ T3583] May be due to missing lock nesting notation [ 60.801890][ T3583] [ 60.810198][ T3583] 4 locks held by syz-executor373/3583: [ 60.815753][ T3583] #0: ffff88807a8131b8 (&tsk->futex_exit_mutex){+.+.}-{3:3}, at: futex_exit_release+0x30/0x1e0 [ 60.826192][ T3583] #1: ffffffff8d12ac40 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 60.835594][ T3583] #2: ffff88807e68a240 (&stab->lock){+...}-{2:2}, at: sock_map_delete_elem+0x161/0x230 [ 60.845346][ T3583] #3: ffffffff8d12ac40 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 60.854837][ T3583] [ 60.854837][ T3583] stack backtrace: [ 60.860716][ T3583] CPU: 0 PID: 3583 Comm: syz-executor373 Not tainted 6.1.85-syzkaller #0 [ 60.869128][ T3583] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 60.879196][ T3583] Call Trace: [ 60.882476][ T3583] [ 60.885410][ T3583] dump_stack_lvl+0x1e3/0x2cb [ 60.890102][ T3583] ? nf_tcp_handle_invalid+0x642/0x642 [ 60.895565][ T3583] ? panic+0x75d/0x75d [ 60.899658][ T3583] validate_chain+0x4711/0x5950 [ 60.904528][ T3583] ? reacquire_held_locks+0x660/0x660 [ 60.909917][ T3583] ? is_bpf_text_address+0x22/0x2a0 [ 60.915117][ T3583] ? reacquire_held_locks+0x660/0x660 [ 60.920517][ T3583] ? unwind_next_frame+0x1a3f/0x2220 [ 60.925798][ T3583] ? deref_stack_reg+0x17c/0x210 [ 60.930753][ T3583] ? mark_lock+0x9a/0x340 [ 60.935094][ T3583] __lock_acquire+0x125b/0x1f80 [ 60.939994][ T3583] lock_acquire+0x1f8/0x5a0 [ 60.944502][ T3583] ? sock_map_delete_elem+0x161/0x230 [ 60.949889][ T3583] ? read_lock_is_recursive+0x10/0x10 [ 60.955269][ T3583] ? sock_map_delete_elem+0x161/0x230 [ 60.960653][ T3583] ? __bpf_trace_softirq+0x10/0x10 [ 60.965773][ T3583] ? sock_map_delete_elem+0x161/0x230 [ 60.971166][ T3583] _raw_spin_lock_bh+0x31/0x40 [ 60.975934][ T3583] ? sock_map_delete_elem+0x161/0x230 [ 60.981324][ T3583] sock_map_delete_elem+0x161/0x230 [ 60.986528][ T3583] ? sock_map_update_elem+0x500/0x500 [ 60.991907][ T3583] ? validate_chain+0x112/0x5950 [ 60.996852][ T3583] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 61.002305][ T3583] bpf_trace_run2+0x1fd/0x410 [ 61.006978][ T3583] ? bpf_trace_run2+0x110/0x410 [ 61.011824][ T3583] ? bpf_trace_run1+0x3d0/0x3d0 [ 61.016671][ T3583] ? mark_lock+0x9a/0x340 [ 61.021005][ T3583] ? __bpf_trace_contention_begin+0x10/0x10 [ 61.026921][ T3583] __traceiter_contention_end+0x74/0xa0 [ 61.032468][ T3583] trace_contention_end+0x14c/0x190 [ 61.037664][ T3583] __pv_queued_spin_lock_slowpath+0x935/0xc50 [ 61.043759][ T3583] ? __pv_queued_spin_unlock_slowpath+0x2e0/0x2e0 [ 61.050186][ T3583] queued_spin_lock_slowpath+0x42/0x50 [ 61.055644][ T3583] do_raw_spin_lock+0x269/0x370 [ 61.060490][ T3583] ? __bpf_trace_softirq+0x10/0x10 [ 61.065607][ T3583] ? __rwlock_init+0x140/0x140 [ 61.070368][ T3583] ? sock_map_delete_elem+0x161/0x230 [ 61.075745][ T3583] sock_map_delete_elem+0x161/0x230 [ 61.080947][ T3583] ? sock_map_update_elem+0x500/0x500 [ 61.086325][ T3583] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 61.091797][ T3583] bpf_trace_run2+0x1fd/0x410 [ 61.096488][ T3583] ? bpf_trace_run2+0x110/0x410 [ 61.101339][ T3583] ? bpf_trace_run1+0x3d0/0x3d0 [ 61.106192][ T3583] ? __mutex_trylock_common+0x17e/0x2e0 [ 61.111761][ T3583] ? __might_sleep+0xb0/0xb0 [ 61.116373][ T3583] ? __bpf_trace_contention_begin+0x10/0x10 [ 61.122279][ T3583] __traceiter_contention_end+0x74/0xa0 [ 61.127898][ T3583] trace_contention_end+0x12f/0x170 [ 61.133134][ T3583] __mutex_lock+0x2ed/0xd80 [ 61.137655][ T3583] ? acct_collect+0x63e/0x7f0 [ 61.142346][ T3583] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 61.148354][ T3583] ? futex_exit_release+0x30/0x1e0 [ 61.153510][ T3583] ? print_irqtrace_events+0x210/0x210 [ 61.158987][ T3583] ? mutex_lock_nested+0x10/0x10 [ 61.163951][ T3583] ? _raw_spin_unlock_irq+0x1f/0x40 [ 61.169173][ T3583] ? lockdep_hardirqs_on+0x94/0x130 [ 61.174383][ T3583] ? _raw_spin_unlock_irq+0x2a/0x40 [ 61.179586][ T3583] ? acct_collect+0x63e/0x7f0 [ 61.184270][ T3583] futex_exit_release+0x30/0x1e0 [ 61.189232][ T3583] exit_mm_release+0x16/0x30 [ 61.193830][ T3583] exit_mm+0xa9/0x300 [ 61.197857][ T3583] ? do_exit+0x26a0/0x26a0 [ 61.202283][ T3583] ? taskstats_exit+0x399/0x920 [ 61.207142][ T3583] ? tty_audit_exit+0x150/0x1f0 [ 61.212021][ T3583] do_exit+0x9f6/0x26a0 [ 61.216192][ T3583] ? put_task_struct+0x80/0x80 [ 61.220959][ T3583] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 61.226946][ T3583] ? print_irqtrace_events+0x210/0x210 [ 61.232408][ T3583] ? _raw_spin_unlock_irq+0x1f/0x40 [ 61.237606][ T3583] ? lockdep_hardirqs_on+0x94/0x130 [ 61.242802][ T3583] do_group_exit+0x202/0x2b0 [ 61.247398][ T3583] __x64_sys_exit_group+0x3b/0x40 [ 61.252423][ T3583] do_syscall_64+0x3b/0xb0 [ 61.256842][ T3583] ? clear_bhb_loop+0x45/0xa0 [ 61.261522][ T3583] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 61.267417][ T3583] RIP: 0033:0x7f09a6fab0f9 [ 61.271832][ T3583] 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 [ 61.291448][ T3583] RSP: 002b:00007fffe9b993d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 61.299857][ T3583] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f09a6fab0f9 executing program executing program executing program executing program executing program executing program executing program executing program [ 61.307824][ T3583] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 61.315790][ T3583] RBP: 00007f09a70262b0 R08: ffffffffffffffb8 R09: 00000000000000a0 [ 61.323760][ T3583] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f09a70262b0 [ 61.331730][ T3583] R13: 0000000000000000 R14: 00007f09a7026d20 R15: 00007f09a6f7c280 [ 61.339705][ T3583] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program