DUID 00:04:db:f4:e7:68:46:23:28:42:c6:e6:ad:d8:a9:e5:16:70 forked to background, child pid 3917 [ 49.367568][ T3918] 8021q: adding VLAN 0 to HW filter on device bond0 [ 49.380405][ T3918] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.121' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 74.017536][ T4256] [ 74.019931][ T4256] ============================================ [ 74.026079][ T4256] WARNING: possible recursive locking detected [ 74.032253][ T4256] 6.1.121-syzkaller #0 Tainted: G W [ 74.038830][ T4256] -------------------------------------------- [ 74.044990][ T4256] syz-executor122/4256 is trying to acquire lock: [ 74.051438][ T4256] ffff88802d1f6218 (&qs->lock){..-.}-{2:2}, at: queue_stack_map_push_elem+0x1ac/0x650 [ 74.061047][ T4256] [ 74.061047][ T4256] but task is already holding lock: [ 74.068628][ T4256] ffff888029cf5a18 (&qs->lock){..-.}-{2:2}, at: queue_stack_map_push_elem+0x1ac/0x650 [ 74.078941][ T4256] [ 74.078941][ T4256] other info that might help us debug this: [ 74.087412][ T4256] Possible unsafe locking scenario: [ 74.087412][ T4256] [ 74.095677][ T4256] CPU0 [ 74.099288][ T4256] ---- [ 74.102640][ T4256] lock(&qs->lock); [ 74.107348][ T4256] lock(&qs->lock); [ 74.111390][ T4256] [ 74.111390][ T4256] *** DEADLOCK *** [ 74.111390][ T4256] [ 74.119590][ T4256] May be due to missing lock nesting notation [ 74.119590][ T4256] [ 74.128009][ T4256] 4 locks held by syz-executor122/4256: [ 74.133630][ T4256] #0: ffff88802ebecf78 (&tsk->futex_exit_mutex){+.+.}-{3:3}, at: futex_exit_release+0x30/0x1e0 [ 74.144360][ T4256] #1: ffffffff8d32b080 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 74.153853][ T4256] #2: ffff888029cf5a18 (&qs->lock){..-.}-{2:2}, at: queue_stack_map_push_elem+0x1ac/0x650 [ 74.163923][ T4256] #3: ffffffff8d32b080 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 [ 74.173433][ T4256] [ 74.173433][ T4256] stack backtrace: [ 74.179375][ T4256] CPU: 0 PID: 4256 Comm: syz-executor122 Tainted: G W 6.1.121-syzkaller #0 [ 74.189484][ T4256] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 74.199566][ T4256] Call Trace: [ 74.202957][ T4256] [ 74.206173][ T4256] dump_stack_lvl+0x1e3/0x2cb [ 74.212209][ T4256] ? nf_tcp_handle_invalid+0x642/0x642 [ 74.218051][ T4256] ? panic+0x764/0x764 [ 74.222186][ T4256] validate_chain+0x4711/0x5950 [ 74.227554][ T4256] ? reacquire_held_locks+0x660/0x660 [ 74.233116][ T4256] ? __lock_acquire+0x125b/0x1f80 [ 74.239381][ T4256] ? reacquire_held_locks+0x660/0x660 [ 74.245370][ T4256] ? mark_lock+0x9a/0x340 [ 74.249760][ T4256] ? mark_lock+0x9a/0x340 [ 74.254133][ T4256] ? mark_lock+0x9a/0x340 [ 74.258503][ T4256] __lock_acquire+0x125b/0x1f80 [ 74.263491][ T4256] lock_acquire+0x1f8/0x5a0 [ 74.268048][ T4256] ? queue_stack_map_push_elem+0x1ac/0x650 [ 74.273911][ T4256] ? is_bpf_text_address+0x22/0x2a0 [ 74.279311][ T4256] ? read_lock_is_recursive+0x10/0x10 [ 74.284738][ T4256] ? unwind_next_frame+0x1a3f/0x2220 [ 74.290072][ T4256] ? deref_stack_reg+0x17c/0x210 [ 74.295024][ T4256] ? mark_lock+0x9a/0x340 [ 74.299545][ T4256] ? __lock_acquire+0x125b/0x1f80 [ 74.304612][ T4256] _raw_spin_lock_irqsave+0xd1/0x120 [ 74.309944][ T4256] ? queue_stack_map_push_elem+0x1ac/0x650 [ 74.315806][ T4256] ? _raw_spin_lock+0x40/0x40 [ 74.320673][ T4256] queue_stack_map_push_elem+0x1ac/0x650 [ 74.326494][ T4256] ? queue_stack_map_delete_elem+0x10/0x10 [ 74.332938][ T4256] ? __cant_sleep+0x270/0x270 [ 74.337898][ T4256] bpf_prog_216c997a1f42e404+0x37/0x3b [ 74.343913][ T4256] bpf_trace_run2+0x1fd/0x410 [ 74.349153][ T4256] ? bpf_trace_run2+0x110/0x410 [ 74.354183][ T4256] ? bpf_trace_run1+0x3d0/0x3d0 [ 74.359157][ T4256] ? __bpf_trace_contention_begin+0x10/0x10 [ 74.365097][ T4256] __traceiter_contention_end+0x74/0xa0 [ 74.372014][ T4256] trace_contention_end+0x14c/0x190 [ 74.377441][ T4256] __pv_queued_spin_lock_slowpath+0x935/0xc50 [ 74.383545][ T4256] ? __pv_queued_spin_unlock_slowpath+0x2e0/0x2e0 [ 74.390104][ T4256] queued_spin_lock_slowpath+0x42/0x50 [ 74.395969][ T4256] do_raw_spin_lock+0x269/0x370 [ 74.402862][ T4256] ? __rwlock_init+0x140/0x140 [ 74.409470][ T4256] ? _raw_spin_lock_irqsave+0xac/0x120 [ 74.415558][ T4256] _raw_spin_lock_irqsave+0xdd/0x120 [ 74.421693][ T4256] ? _raw_spin_lock+0x40/0x40 [ 74.426693][ T4256] queue_stack_map_push_elem+0x1ac/0x650 [ 74.432471][ T4256] ? queue_stack_map_delete_elem+0x10/0x10 [ 74.438416][ T4256] ? __cant_sleep+0x270/0x270 [ 74.443139][ T4256] bpf_prog_216c997a1f42e404+0x37/0x3b [ 74.448720][ T4256] bpf_trace_run2+0x1fd/0x410 [ 74.453782][ T4256] ? bpf_trace_run2+0x110/0x410 [ 74.458684][ T4256] ? bpf_trace_run1+0x3d0/0x3d0 [ 74.463648][ T4256] ? __mutex_trylock_common+0x17e/0x2e0 [ 74.469233][ T4256] ? __might_sleep+0xb0/0xb0 [ 74.473937][ T4256] ? __bpf_trace_contention_begin+0x10/0x10 [ 74.479866][ T4256] __traceiter_contention_end+0x74/0xa0 [ 74.485559][ T4256] trace_contention_end+0x12f/0x170 [ 74.490883][ T4256] __mutex_lock+0x2ed/0xd80 [ 74.495585][ T4256] ? acct_collect+0x63e/0x7f0 [ 74.500304][ T4256] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 74.506337][ T4256] ? futex_exit_release+0x30/0x1e0 [ 74.511476][ T4256] ? print_irqtrace_events+0x210/0x210 [ 74.516975][ T4256] ? mutex_lock_nested+0x10/0x10 [ 74.521944][ T4256] ? _raw_spin_unlock_irq+0x1f/0x40 [ 74.527155][ T4256] ? lockdep_hardirqs_on+0x94/0x130 [ 74.532375][ T4256] ? _raw_spin_unlock_irq+0x2a/0x40 [ 74.537609][ T4256] ? acct_collect+0x63e/0x7f0 [ 74.542290][ T4256] futex_exit_release+0x30/0x1e0 [ 74.547243][ T4256] exit_mm_release+0x16/0x30 [ 74.551840][ T4256] exit_mm+0xa9/0x300 [ 74.555838][ T4256] ? do_exit+0x26a0/0x26a0 [ 74.560258][ T4256] ? taskstats_exit+0x399/0x920 [ 74.565516][ T4256] ? tty_audit_exit+0x150/0x1f0 [ 74.570403][ T4256] do_exit+0x9f6/0x26a0 [ 74.574636][ T4256] ? put_task_struct+0x80/0x80 [ 74.579427][ T4256] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 74.585524][ T4256] ? print_irqtrace_events+0x210/0x210 [ 74.591019][ T4256] ? _raw_spin_unlock_irq+0x1f/0x40 [ 74.596244][ T4256] ? lockdep_hardirqs_on+0x94/0x130 [ 74.601489][ T4256] do_group_exit+0x202/0x2b0 [ 74.606096][ T4256] __x64_sys_exit_group+0x3b/0x40 [ 74.611146][ T4256] do_syscall_64+0x3b/0xb0 [ 74.615790][ T4256] ? clear_bhb_loop+0x45/0xa0 [ 74.620506][ T4256] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 74.626684][ T4256] RIP: 0033:0x7f89f1591fb9 [ 74.631396][ T4256] 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 [ 74.652302][ T4256] RSP: 002b:00007fff714aeea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 74.661186][ T4256] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f89f1591fb9 executing program executing program executing program executing program executing program [ 74.669533][ T4256] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 74.679145][ T4256] RBP: 00007f89f160d2b0 R08: ffffffffffffffb8 R09: 00000000000000a0 [ 74.687310][ T4256] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f89f160d2b0 [ 74.695662][ T4256] R13: 0000000000000000 R14: 00007f89f160dd20 R15: 00007f89f1563150 [ 74.703756][ T4256] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program