Warning: Permanently added '10.128.1.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.662901] IPVS: ftp: loaded support on port[0] = 21 [ 31.732396] [ 31.734081] ================================ [ 31.738462] WARNING: inconsistent lock state [ 31.742866] 4.14.236-syzkaller #0 Not tainted [ 31.747434] -------------------------------- [ 31.751936] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 31.758054] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 31.763318] (&(&local->client_conns_lock)->rlock){+.?.}, at: [] rxrpc_put_client_conn+0x661/0xac0 [ 31.773971] {SOFTIRQ-ON-W} state was registered at: [ 31.778980] lock_acquire+0x170/0x3f0 [ 31.782876] _raw_spin_lock+0x2a/0x40 [ 31.786828] rxrpc_connect_call+0x2bb/0x3e10 [ 31.791299] rxrpc_new_client_call+0x8f4/0x1a10 [ 31.796125] rxrpc_do_sendmsg+0x8dc/0xfb0 [ 31.800420] rxrpc_sendmsg+0x3cf/0x5f0 [ 31.804382] sock_sendmsg+0xb5/0x100 [ 31.808155] ___sys_sendmsg+0x6c8/0x800 [ 31.812481] __sys_sendmsg+0xa3/0x120 [ 31.816355] SyS_sendmsg+0x27/0x40 [ 31.819959] do_syscall_64+0x1d5/0x640 [ 31.823951] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 31.829434] irq event stamp: 199678 [ 31.833139] hardirqs last enabled at (199678): [] _raw_spin_unlock_irqrestore+0x79/0xe0 [ 31.842933] hardirqs last disabled at (199677): [] _raw_spin_lock_irqsave+0x66/0xc0 [ 31.852371] softirqs last enabled at (199454): [] irq_enter+0xbd/0xd0 [ 31.860664] softirqs last disabled at (199455): [] irq_exit+0x193/0x240 [ 31.869073] [ 31.869073] other info that might help us debug this: [ 31.875730] Possible unsafe locking scenario: [ 31.875730] [ 31.881847] CPU0 [ 31.884402] ---- [ 31.886973] lock(&(&local->client_conns_lock)->rlock); [ 31.892399] [ 31.895239] lock(&(&local->client_conns_lock)->rlock); [ 31.900841] [ 31.900841] *** DEADLOCK *** [ 31.900841] [ 31.906877] 1 lock held by swapper/0/0: [ 31.910823] #0: (rcu_callback){....}, at: [] rcu_process_callbacks+0x84e/0x1180 [ 31.920001] [ 31.920001] stack backtrace: [ 31.924485] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.236-syzkaller #0 [ 31.931659] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.940987] Call Trace: [ 31.943550] [ 31.945707] dump_stack+0x1b2/0x281 [ 31.949572] print_usage_bug.cold+0x42e/0x570 [ 31.954153] mark_lock+0xb4d/0x1050 [ 31.957768] ? print_irq_inversion_bug+0xd0/0xd0 [ 31.962502] __lock_acquire+0xc81/0x3f20 [ 31.966541] ? __lock_acquire+0x5fc/0x3f20 [ 31.970758] ? trace_hardirqs_on+0x10/0x10 [ 31.974983] ? lock_acquire+0x170/0x3f0 [ 31.978950] ? debug_object_deactivate+0x1da/0x2e0 [ 31.983870] ? trace_hardirqs_on+0x10/0x10 [ 31.988187] ? lock_acquire+0x170/0x3f0 [ 31.992154] ? lock_downgrade+0x740/0x740 [ 31.996379] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 32.001636] lock_acquire+0x170/0x3f0 [ 32.005458] ? rxrpc_put_client_conn+0x661/0xac0 [ 32.010193] _raw_spin_lock+0x2a/0x40 [ 32.014582] ? rxrpc_put_client_conn+0x661/0xac0 [ 32.019332] rxrpc_put_client_conn+0x661/0xac0 [ 32.023993] ? rxrpc_rcu_destroy_call+0x83/0x190 [ 32.028739] rxrpc_rcu_destroy_call+0x83/0x190 [ 32.033299] ? rxrpc_call_timer_expired+0x70/0x70 [ 32.038548] rcu_process_callbacks+0x780/0x1180 [ 32.043207] ? note_gp_changes+0x2f0/0x2f0 [ 32.047418] ? sched_clock+0x2a/0x40 [ 32.051112] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 32.056648] __do_softirq+0x24d/0x9ff [ 32.060424] ? check_preemption_disabled+0x35/0x240 [ 32.065606] irq_exit+0x193/0x240 [ 32.069056] smp_apic_timer_interrupt+0x141/0x5e0 [ 32.073886] apic_timer_interrupt+0x93/0xa0 [ 32.078197] [ 32.080424] RIP: 0010:native_safe_halt+0xe/0x10 [ 32.085065] RSP: 0018:ffffffff88e07e78 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 [ 32.092904] RAX: 1ffffffff11e125c RBX: dffffc0000000000 RCX: 0000000000000000 [ 32.100270] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e74cc4 [ 32.107530] RBP: ffffffff88f092d0 R08: 0000000000000000 R09: 0000000000000000 [ 32.114788] R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff11ce888 [ 32.122034] R13: ffffffff88e74440 R14: 0000000000000000 R15: 0000000000000000 [ 32.129288] default_idle+0x47/0x370 [ 32.132997]