Warning: Permanently added '10.128.0.178' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 53.333753][ T3555] [ 53.336111][ T3555] ============================================ [ 53.342248][ T3555] WARNING: possible recursive locking detected [ 53.348379][ T3555] 6.1.90-syzkaller #0 Not tainted [ 53.353378][ T3555] -------------------------------------------- [ 53.359507][ T3555] syz-executor415/3555 is trying to acquire lock: [ 53.365898][ T3555] ffff8881447cb968 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_delete_elem+0x177/0x400 [ 53.376246][ T3555] [ 53.376246][ T3555] but task is already holding lock: [ 53.383586][ T3555] ffff8881447cbb68 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_delete_elem+0x177/0x400 [ 53.393930][ T3555] [ 53.393930][ T3555] other info that might help us debug this: [ 53.401967][ T3555] Possible unsafe locking scenario: [ 53.401967][ T3555] [ 53.409398][ T3555] CPU0 [ 53.412666][ T3555] ---- [ 53.415929][ T3555] lock(&htab->buckets[i].lock); [ 53.420935][ T3555] lock(&htab->buckets[i].lock); [ 53.425943][ T3555] [ 53.425943][ T3555] *** DEADLOCK *** [ 53.425943][ T3555] [ 53.434065][ T3555] May be due to missing lock nesting notation [ 53.434065][ T3555] [ 53.442363][ T3555] 4 locks held by syz-executor415/3555: [ 53.447888][ T3555] #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 53.457263][ T3555] #1: ffff8881447cbb68 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_delete_elem+0x177/0x400 [ 53.468055][ T3555] #2: ffff888018ae9290 (&psock->link_lock){+.-.}-{2:2}, at: sock_map_unref+0xcc/0x5d0 [ 53.477699][ T3555] #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 53.487075][ T3555] [ 53.487075][ T3555] stack backtrace: [ 53.492945][ T3555] CPU: 1 PID: 3555 Comm: syz-executor415 Not tainted 6.1.90-syzkaller #0 [ 53.501342][ T3555] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 53.511379][ T3555] Call Trace: [ 53.514655][ T3555] [ 53.517573][ T3555] dump_stack_lvl+0x1e3/0x2cb [ 53.522255][ T3555] ? nf_tcp_handle_invalid+0x642/0x642 [ 53.527720][ T3555] ? panic+0x764/0x764 [ 53.531782][ T3555] validate_chain+0x4711/0x5950 [ 53.536642][ T3555] ? check_path+0x40/0x40 [ 53.541052][ T3555] ? check_path+0x21/0x40 [ 53.545364][ T3555] ? check_noncircular+0x1e3/0x3b0 [ 53.550461][ T3555] ? reacquire_held_locks+0x660/0x660 [ 53.555833][ T3555] ? add_chain_block+0x850/0x850 [ 53.560763][ T3555] ? lockdep_unlock+0x165/0x300 [ 53.565603][ T3555] ? lockdep_lock+0x2a0/0x2a0 [ 53.570274][ T3555] ? validate_chain+0x13ce/0x5950 [ 53.575292][ T3555] ? reacquire_held_locks+0x660/0x660 [ 53.580658][ T3555] ? mark_lock+0x9a/0x340 [ 53.584983][ T3555] __lock_acquire+0x125b/0x1f80 [ 53.589839][ T3555] lock_acquire+0x1f8/0x5a0 [ 53.594426][ T3555] ? sock_hash_delete_elem+0x177/0x400 [ 53.599887][ T3555] ? read_lock_is_recursive+0x10/0x10 [ 53.605258][ T3555] ? sock_hash_delete_elem+0x177/0x400 [ 53.610713][ T3555] ? __bpf_trace_softirq+0x10/0x10 [ 53.615822][ T3555] ? sock_hash_delete_elem+0x177/0x400 [ 53.621275][ T3555] _raw_spin_lock_bh+0x31/0x40 [ 53.626031][ T3555] ? sock_hash_delete_elem+0x177/0x400 [ 53.631489][ T3555] sock_hash_delete_elem+0x177/0x400 [ 53.636780][ T3555] ? sock_hash_lookup+0x660/0x660 [ 53.641808][ T3555] bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e [ 53.647345][ T3555] bpf_trace_run2+0x1fd/0x410 [ 53.652014][ T3555] ? bpf_trace_run2+0x110/0x410 [ 53.656861][ T3555] ? bpf_trace_run1+0x3d0/0x3d0 [ 53.661702][ T3555] ? do_raw_spin_lock+0x14a/0x370 [ 53.666717][ T3555] ? sock_map_unref+0x3ac/0x5d0 [ 53.671567][ T3555] ? __bpf_trace_softirq+0x10/0x10 [ 53.676682][ T3555] ? sock_map_unref+0x3ac/0x5d0 [ 53.681547][ T3555] __bpf_trace_kfree+0x6e/0x90 [ 53.686307][ T3555] ? sock_map_unref+0x3ac/0x5d0 [ 53.691167][ T3555] __traceiter_kfree+0x26/0x40 [ 53.695920][ T3555] ? sock_map_unref+0x3ac/0x5d0 [ 53.700768][ T3555] kfree+0xf6/0x190 [ 53.704566][ T3555] sock_map_unref+0x3ac/0x5d0 [ 53.709244][ T3555] sock_hash_delete_elem+0x388/0x400 [ 53.714528][ T3555] ? bpf_trace_run2+0x110/0x410 [ 53.719369][ T3555] ? sock_hash_lookup+0x660/0x660 [ 53.724407][ T3555] ? mutex_unlock+0x10/0x10 [ 53.728914][ T3555] ? bpf_trace_run2+0x1fd/0x410 [ 53.733753][ T3555] ? bpf_trace_run2+0x110/0x410 [ 53.738593][ T3555] ? bpf_trace_run1+0x3d0/0x3d0 [ 53.743434][ T3555] ? bpf_link_release+0x37/0x40 [ 53.748287][ T3555] ? bpf_prog_put+0xe4/0x2a0 [ 53.752874][ T3555] ? bpf_prog_free_id+0x190/0x190 [ 53.757899][ T3555] ? bpf_link_release+0x37/0x40 [ 53.762759][ T3555] ? __bpf_trace_kfree+0x6e/0x90 [ 53.767694][ T3555] ? bpf_link_release+0x37/0x40 [ 53.772544][ T3555] ? __traceiter_kfree+0x26/0x40 [ 53.777475][ T3555] ? bpf_link_release+0x37/0x40 [ 53.782328][ T3555] ? kfree+0xf6/0x190 [ 53.786321][ T3555] ? bpf_link_release+0x37/0x40 [ 53.791165][ T3555] ? idr_preload_end+0x1f0/0x1f0 [ 53.796101][ T3555] ? __fput+0x3b7/0x890 [ 53.800256][ T3555] ? task_work_run+0x246/0x300 [ 53.805031][ T3555] ? task_work_cancel+0x2b0/0x2b0 [ 53.810073][ T3555] ? exit_task_namespaces+0xdd/0xf0 [ 53.815288][ T3555] ? do_exit+0xa73/0x26a0 [ 53.819632][ T3555] ? put_task_struct+0x80/0x80 [ 53.824391][ T3555] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 53.830385][ T3555] ? print_irqtrace_events+0x210/0x210 executing program executing program executing program executing program executing program executing program executing program [ 53.835847][ T3555] ? _raw_spin_unlock_irq+0x1f/0x40 [ 53.841041][ T3555] ? lockdep_hardirqs_on+0x94/0x130 [ 53.846236][ T3555] ? do_group_exit+0x202/0x2b0 [ 53.850997][ T3555] ? __x64_sys_exit_group+0x3b/0x40 [ 53.856196][ T3555] ? do_syscall_64+0x3b/0xb0 [ 53.860792][ T3555] ? clear_bhb_loop+0x45/0xa0 [ 53.865468][ T3555] ? entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 53.871541][ T3555] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program