Warning: Permanently added '10.128.0.43' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 50.804394][ T3548] [ 50.806854][ T3548] ============================================ [ 50.813075][ T3548] WARNING: possible recursive locking detected [ 50.819203][ T3548] 6.1.81-syzkaller #0 Not tainted [ 50.824221][ T3548] -------------------------------------------- [ 50.830454][ T3548] syz-executor262/3548 is trying to acquire lock: [ 50.836872][ T3548] ffffc90003ce90d8 (&rb->spinlock){....}-{2:2}, at: __bpf_ringbuf_reserve+0x20d/0x4f0 [ 50.846459][ T3548] [ 50.846459][ T3548] but task is already holding lock: [ 50.854010][ T3548] ffffc90003c650d8 (&rb->spinlock){....}-{2:2}, at: __bpf_ringbuf_reserve+0x20d/0x4f0 [ 50.863572][ T3548] [ 50.863572][ T3548] other info that might help us debug this: [ 50.871643][ T3548] Possible unsafe locking scenario: [ 50.871643][ T3548] [ 50.879189][ T3548] CPU0 [ 50.882457][ T3548] ---- [ 50.885727][ T3548] lock(&rb->spinlock); [ 50.889950][ T3548] lock(&rb->spinlock); [ 50.894196][ T3548] [ 50.894196][ T3548] *** DEADLOCK *** [ 50.894196][ T3548] [ 50.902349][ T3548] May be due to missing lock nesting notation [ 50.902349][ T3548] [ 50.910675][ T3548] 4 locks held by syz-executor262/3548: [ 50.916301][ T3548] #0: ffff88801f7313f8 (&tsk->futex_exit_mutex){+.+.}-{3:3}, at: futex_exit_release+0x30/0x1e0 [ 50.926756][ T3548] #1: ffffffff8d12a840 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 50.937039][ T3548] #2: ffffc90003c650d8 (&rb->spinlock){....}-{2:2}, at: __bpf_ringbuf_reserve+0x20d/0x4f0 [ 50.947403][ T3548] #3: ffffffff8d12a840 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 50.956818][ T3548] [ 50.956818][ T3548] stack backtrace: [ 50.962689][ T3548] CPU: 0 PID: 3548 Comm: syz-executor262 Not tainted 6.1.81-syzkaller #0 [ 50.971188][ T3548] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 50.981262][ T3548] Call Trace: [ 50.984559][ T3548] [ 50.987483][ T3548] dump_stack_lvl+0x1e3/0x2cb [ 50.992202][ T3548] ? nf_tcp_handle_invalid+0x642/0x642 [ 50.997687][ T3548] ? panic+0x75d/0x75d [ 51.001839][ T3548] validate_chain+0x4711/0x5950 [ 51.006696][ T3548] ? validate_chain+0x13ce/0x5950 [ 51.011713][ T3548] ? reacquire_held_locks+0x660/0x660 [ 51.017069][ T3548] ? validate_chain+0x112/0x5950 [ 51.021992][ T3548] ? reacquire_held_locks+0x660/0x660 [ 51.027369][ T3548] ? mark_lock+0x9a/0x340 [ 51.031701][ T3548] ? mark_lock+0x9a/0x340 [ 51.036452][ T3548] ? mark_lock+0x9a/0x340 [ 51.040771][ T3548] __lock_acquire+0x125b/0x1f80 [ 51.045634][ T3548] lock_acquire+0x1f8/0x5a0 [ 51.050132][ T3548] ? __bpf_ringbuf_reserve+0x20d/0x4f0 [ 51.055574][ T3548] ? is_bpf_text_address+0x22/0x2a0 [ 51.060751][ T3548] ? read_lock_is_recursive+0x10/0x10 [ 51.066103][ T3548] ? unwind_next_frame+0x1a3f/0x2220 [ 51.071418][ T3548] ? deref_stack_reg+0x17c/0x210 [ 51.076384][ T3548] ? mark_lock+0x9a/0x340 [ 51.080713][ T3548] ? __lock_acquire+0x125b/0x1f80 [ 51.085751][ T3548] _raw_spin_lock_irqsave+0xd1/0x120 [ 51.091068][ T3548] ? __bpf_ringbuf_reserve+0x20d/0x4f0 [ 51.096660][ T3548] ? _raw_spin_lock+0x40/0x40 [ 51.101355][ T3548] __bpf_ringbuf_reserve+0x20d/0x4f0 [ 51.106658][ T3548] ? read_lock_is_recursive+0x10/0x10 [ 51.112039][ T3548] ? bpf_ringbuf_notify+0x20/0x20 [ 51.117055][ T3548] ? __cant_sleep+0x270/0x270 [ 51.121728][ T3548] bpf_ringbuf_reserve+0x58/0x70 [ 51.126650][ T3548] bpf_prog_9efe54833449f08e+0x25/0x3f [ 51.132192][ T3548] bpf_trace_run2+0x1fd/0x410 [ 51.136897][ T3548] ? bpf_trace_run2+0x110/0x410 [ 51.141740][ T3548] ? bpf_trace_run1+0x3d0/0x3d0 [ 51.146574][ T3548] ? __bpf_trace_contention_begin+0x10/0x10 [ 51.152459][ T3548] __traceiter_contention_end+0x74/0xa0 [ 51.157993][ T3548] trace_contention_end+0x14c/0x190 [ 51.163290][ T3548] __pv_queued_spin_lock_slowpath+0x935/0xc50 [ 51.169344][ T3548] ? __pv_queued_spin_unlock_slowpath+0x2e0/0x2e0 [ 51.175742][ T3548] queued_spin_lock_slowpath+0x42/0x50 [ 51.181186][ T3548] do_raw_spin_lock+0x269/0x370 [ 51.186019][ T3548] ? __rwlock_init+0x140/0x140 [ 51.190764][ T3548] ? _raw_spin_lock_irqsave+0xac/0x120 [ 51.196209][ T3548] _raw_spin_lock_irqsave+0xdd/0x120 [ 51.201478][ T3548] ? _raw_spin_lock+0x40/0x40 [ 51.206154][ T3548] __bpf_ringbuf_reserve+0x20d/0x4f0 [ 51.211443][ T3548] ? read_lock_is_recursive+0x10/0x10 [ 51.217342][ T3548] ? bpf_ringbuf_notify+0x20/0x20 [ 51.222357][ T3548] ? __cant_sleep+0x270/0x270 [ 51.227021][ T3548] bpf_ringbuf_reserve+0x58/0x70 [ 51.231941][ T3548] bpf_prog_9efe54833449f08e+0x25/0x3f [ 51.237479][ T3548] bpf_trace_run2+0x1fd/0x410 [ 51.242181][ T3548] ? bpf_trace_run2+0x110/0x410 [ 51.247059][ T3548] ? bpf_trace_run1+0x3d0/0x3d0 [ 51.251963][ T3548] ? __mutex_trylock_common+0x17e/0x2e0 [ 51.257625][ T3548] ? __might_sleep+0xb0/0xb0 [ 51.262346][ T3548] ? __bpf_trace_contention_begin+0x10/0x10 [ 51.268246][ T3548] __traceiter_contention_end+0x74/0xa0 [ 51.273798][ T3548] trace_contention_end+0x12f/0x170 [ 51.279126][ T3548] __mutex_lock+0x2ed/0xd80 [ 51.283659][ T3548] ? acct_collect+0x63e/0x7f0 [ 51.288331][ T3548] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 51.294301][ T3548] ? futex_exit_release+0x30/0x1e0 [ 51.299425][ T3548] ? print_irqtrace_events+0x210/0x210 [ 51.304872][ T3548] ? mutex_lock_nested+0x10/0x10 [ 51.309801][ T3548] ? _raw_spin_unlock_irq+0x1f/0x40 [ 51.314983][ T3548] ? lockdep_hardirqs_on+0x94/0x130 [ 51.320166][ T3548] ? _raw_spin_unlock_irq+0x2a/0x40 [ 51.325349][ T3548] ? acct_collect+0x63e/0x7f0 [ 51.330224][ T3548] futex_exit_release+0x30/0x1e0 [ 51.335224][ T3548] exit_mm_release+0x16/0x30 [ 51.339810][ T3548] exit_mm+0xa9/0x300 [ 51.343950][ T3548] ? do_exit+0x26a0/0x26a0 [ 51.348411][ T3548] ? taskstats_exit+0x399/0x920 [ 51.353283][ T3548] ? tty_audit_exit+0x150/0x1f0 [ 51.358234][ T3548] do_exit+0x9f6/0x26a0 [ 51.362446][ T3548] ? put_task_struct+0x80/0x80 [ 51.367206][ T3548] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 51.373210][ T3548] ? print_irqtrace_events+0x210/0x210 [ 51.378785][ T3548] ? _raw_spin_unlock_irq+0x1f/0x40 [ 51.384006][ T3548] ? lockdep_hardirqs_on+0x94/0x130 [ 51.389314][ T3548] do_group_exit+0x202/0x2b0 [ 51.393915][ T3548] __x64_sys_exit_group+0x3b/0x40 [ 51.398983][ T3548] do_syscall_64+0x3d/0xb0 [ 51.403537][ T3548] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 51.409581][ T3548] RIP: 0033:0x7f9821f6ce79 [ 51.414195][ T3548] 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 [ 51.434695][ T3548] RSP: 002b:00007ffcad784b68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 51.443314][ T3548] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9821f6ce79 executing program executing program executing program executing program executing program executing program [ 51.451349][ T3548] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 51.459316][ T3548] RBP: 00007f9821fe82b0 R08: ffffffffffffffb8 R09: 00000000000000a0 [ 51.467282][ T3548] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9821fe82b0 [ 51.475265][ T3548] R13: 0000000000000000 R14: 00007f9821fe8d20 R15: 00007f9821f3e000 [ 51.483256][ T3548] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program