Warning: Permanently added '10.128.0.251' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.325650][ T3617] [ 70.328045][ T3617] ============================================ [ 70.334195][ T3617] WARNING: possible recursive locking detected [ 70.340350][ T3617] 6.1.87-syzkaller #0 Not tainted [ 70.345365][ T3617] -------------------------------------------- [ 70.351510][ T3617] syz-executor352/3617 is trying to acquire lock: [ 70.357912][ T3617] ffff8880232b5020 (&htab->buckets[i].lock){+...}-{2:2}, at: sock_hash_delete_elem+0x177/0x400 [ 70.368383][ T3617] [ 70.368383][ T3617] but task is already holding lock: [ 70.375736][ T3617] ffff88807afba020 (&htab->buckets[i].lock){+...}-{2:2}, at: sock_hash_delete_elem+0x177/0x400 [ 70.386149][ T3617] [ 70.386149][ T3617] other info that might help us debug this: [ 70.394213][ T3617] Possible unsafe locking scenario: [ 70.394213][ T3617] [ 70.401670][ T3617] CPU0 [ 70.405056][ T3617] ---- [ 70.408327][ T3617] lock(&htab->buckets[i].lock); [ 70.413348][ T3617] lock(&htab->buckets[i].lock); [ 70.418370][ T3617] [ 70.418370][ T3617] *** DEADLOCK *** [ 70.418370][ T3617] [ 70.426504][ T3617] May be due to missing lock nesting notation [ 70.426504][ T3617] [ 70.434897][ T3617] 4 locks held by syz-executor352/3617: [ 70.440442][ T3617] #0: ffff88807a6f31b8 (&tsk->futex_exit_mutex){+.+.}-{3:3}, at: futex_exit_release+0x30/0x1e0 [ 70.450968][ T3617] #1: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 70.460485][ T3617] #2: ffff88807afba020 (&htab->buckets[i].lock){+...}-{2:2}, at: sock_hash_delete_elem+0x177/0x400 [ 70.471297][ T3617] #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 70.480714][ T3617] [ 70.480714][ T3617] stack backtrace: [ 70.486620][ T3617] CPU: 1 PID: 3617 Comm: syz-executor352 Not tainted 6.1.87-syzkaller #0 [ 70.495040][ T3617] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 70.505184][ T3617] Call Trace: [ 70.508481][ T3617] [ 70.511409][ T3617] dump_stack_lvl+0x1e3/0x2cb [ 70.516167][ T3617] ? nf_tcp_handle_invalid+0x642/0x642 [ 70.521719][ T3617] ? panic+0x764/0x764 [ 70.525793][ T3617] validate_chain+0x4711/0x5950 [ 70.530699][ T3617] ? __lock_acquire+0x125b/0x1f80 [ 70.535732][ T3617] ? reacquire_held_locks+0x660/0x660 [ 70.541122][ T3617] ? is_bpf_text_address+0x22/0x2a0 [ 70.546323][ T3617] ? reacquire_held_locks+0x660/0x660 [ 70.551794][ T3617] ? mark_lock+0x9a/0x340 [ 70.556148][ T3617] __lock_acquire+0x125b/0x1f80 [ 70.561006][ T3617] lock_acquire+0x1f8/0x5a0 [ 70.565578][ T3617] ? sock_hash_delete_elem+0x177/0x400 [ 70.571052][ T3617] ? read_lock_is_recursive+0x10/0x10 [ 70.576436][ T3617] ? sock_hash_delete_elem+0x177/0x400 [ 70.581905][ T3617] ? __bpf_trace_softirq+0x10/0x10 [ 70.587038][ T3617] ? sock_hash_delete_elem+0x177/0x400 [ 70.592506][ T3617] _raw_spin_lock_bh+0x31/0x40 [ 70.597296][ T3617] ? sock_hash_delete_elem+0x177/0x400 [ 70.602753][ T3617] sock_hash_delete_elem+0x177/0x400 [ 70.608129][ T3617] ? reacquire_held_locks+0x660/0x660 [ 70.613504][ T3617] ? sock_hash_lookup+0x660/0x660 [ 70.618534][ T3617] bpf_prog_05fc780d7a5f93f9+0x42/0x46 [ 70.623995][ T3617] bpf_trace_run2+0x1fd/0x410 [ 70.628682][ T3617] ? bpf_trace_run2+0x110/0x410 [ 70.633561][ T3617] ? bpf_trace_run1+0x3d0/0x3d0 [ 70.638404][ T3617] ? validate_chain+0x112/0x5950 [ 70.643347][ T3617] ? mark_lock+0x9a/0x340 [ 70.647701][ T3617] ? __bpf_trace_contention_begin+0x10/0x10 [ 70.653608][ T3617] __traceiter_contention_end+0x74/0xa0 [ 70.659173][ T3617] trace_contention_end+0x14c/0x190 [ 70.664367][ T3617] __pv_queued_spin_lock_slowpath+0x935/0xc50 [ 70.670440][ T3617] ? __pv_queued_spin_unlock_slowpath+0x2e0/0x2e0 [ 70.676856][ T3617] queued_spin_lock_slowpath+0x42/0x50 [ 70.682322][ T3617] do_raw_spin_lock+0x269/0x370 [ 70.687168][ T3617] ? __bpf_trace_softirq+0x10/0x10 [ 70.692285][ T3617] ? __rwlock_init+0x140/0x140 [ 70.697042][ T3617] ? sock_hash_delete_elem+0x177/0x400 [ 70.702550][ T3617] sock_hash_delete_elem+0x177/0x400 [ 70.707955][ T3617] ? sock_hash_lookup+0x660/0x660 [ 70.713017][ T3617] bpf_prog_05fc780d7a5f93f9+0x42/0x46 [ 70.718601][ T3617] bpf_trace_run2+0x1fd/0x410 [ 70.723309][ T3617] ? bpf_trace_run2+0x110/0x410 [ 70.728187][ T3617] ? bpf_trace_run1+0x3d0/0x3d0 [ 70.733048][ T3617] ? __mutex_trylock_common+0x17e/0x2e0 [ 70.738636][ T3617] ? __might_sleep+0xb0/0xb0 [ 70.743246][ T3617] ? __bpf_trace_contention_begin+0x10/0x10 [ 70.749155][ T3617] __traceiter_contention_end+0x74/0xa0 [ 70.754740][ T3617] trace_contention_end+0x12f/0x170 [ 70.760088][ T3617] __mutex_lock+0x2ed/0xd80 [ 70.764620][ T3617] ? acct_collect+0x63e/0x7f0 [ 70.769328][ T3617] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 70.775320][ T3617] ? futex_exit_release+0x30/0x1e0 [ 70.780429][ T3617] ? print_irqtrace_events+0x210/0x210 [ 70.785911][ T3617] ? mutex_lock_nested+0x10/0x10 [ 70.790866][ T3617] ? _raw_spin_unlock_irq+0x1f/0x40 [ 70.796073][ T3617] ? lockdep_hardirqs_on+0x94/0x130 [ 70.801274][ T3617] ? _raw_spin_unlock_irq+0x2a/0x40 [ 70.806468][ T3617] ? acct_collect+0x63e/0x7f0 [ 70.811153][ T3617] futex_exit_release+0x30/0x1e0 [ 70.816096][ T3617] exit_mm_release+0x16/0x30 [ 70.820681][ T3617] exit_mm+0xa9/0x300 [ 70.824700][ T3617] ? do_exit+0x26a0/0x26a0 [ 70.829118][ T3617] ? taskstats_exit+0x399/0x920 [ 70.833960][ T3617] ? tty_audit_exit+0x150/0x1f0 [ 70.838866][ T3617] do_exit+0x9f6/0x26a0 [ 70.843026][ T3617] ? put_task_struct+0x80/0x80 [ 70.847794][ T3617] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 70.853778][ T3617] ? print_irqtrace_events+0x210/0x210 [ 70.859257][ T3617] ? _raw_spin_unlock_irq+0x1f/0x40 [ 70.864451][ T3617] ? lockdep_hardirqs_on+0x94/0x130 [ 70.869646][ T3617] do_group_exit+0x202/0x2b0 [ 70.874239][ T3617] __x64_sys_exit_group+0x3b/0x40 [ 70.879262][ T3617] do_syscall_64+0x3b/0xb0 [ 70.883677][ T3617] ? clear_bhb_loop+0x45/0xa0 [ 70.888384][ T3617] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 70.894285][ T3617] RIP: 0033:0x7f3ff4c4ff79 [ 70.898816][ T3617] 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 [ 70.918431][ T3617] RSP: 002b:00007ffd50e2bbf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 executing program executing program executing program executing program executing program executing program [ 70.926872][ T3617] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3ff4c4ff79 [ 70.934855][ T3617] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 70.942831][ T3617] RBP: 00007f3ff4ccb2b0 R08: ffffffffffffffb8 R09: 00000000000000a0 [ 70.950836][ T3617] R10: 00000000000000a0 R11: 0000000000000246 R12: 00007f3ff4ccb2b0 [ 70.958837][ T3617] R13: 0000000000000000 R14: 00007f3ff4ccbd20 R15: 00007f3ff4c21110 [ 70.966825][ T3617] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program