Warning: Permanently added '10.128.0.212' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 94.876764][T10370] IPVS: ftp: loaded support on port[0] = 21 [ 94.949896][ C1] [ 94.952335][ C1] ================================ [ 94.957555][ C1] WARNING: inconsistent lock state [ 94.962671][ C1] 5.5.0-syzkaller #0 Not tainted [ 94.967596][ C1] -------------------------------- [ 94.972708][ C1] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 94.979580][ C1] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 94.985542][ C1] ffff88808e8fa1c8 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x6ed/0xc90 [ 94.996522][ C1] {SOFTIRQ-ON-W} state was registered at: [ 95.002493][ C1] lock_acquire+0x190/0x410 [ 95.007086][ C1] _raw_spin_lock+0x2f/0x40 [ 95.011655][ C1] rxrpc_connect_call+0x358/0x4e30 [ 95.016856][ C1] rxrpc_new_client_call+0x9c0/0x1ad0 [ 95.022313][ C1] rxrpc_do_sendmsg+0xffa/0x1d5f [ 95.027451][ C1] rxrpc_sendmsg+0x4d6/0x5f0 [ 95.032154][ C1] sock_sendmsg+0xd7/0x130 [ 95.036652][ C1] ____sys_sendmsg+0x358/0x880 [ 95.041531][ C1] ___sys_sendmsg+0x100/0x170 [ 95.046300][ C1] __sys_sendmmsg+0x1bf/0x4d0 [ 95.051064][ C1] __x64_sys_sendmmsg+0x9d/0x100 [ 95.056118][ C1] do_syscall_64+0xfa/0x790 [ 95.060705][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 95.066928][ C1] irq event stamp: 130510 [ 95.071255][ C1] hardirqs last enabled at (130510): [] _raw_spin_unlock_irqrestore+0x66/0xe0 [ 95.081915][ C1] hardirqs last disabled at (130509): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 95.091987][ C1] softirqs last enabled at (130494): [] _local_bh_enable+0x1c/0x30 [ 95.102649][ C1] softirqs last disabled at (130495): [] irq_exit+0x19b/0x1e0 [ 95.111656][ C1] [ 95.111656][ C1] other info that might help us debug this: [ 95.119705][ C1] Possible unsafe locking scenario: [ 95.119705][ C1] [ 95.127136][ C1] CPU0 [ 95.130407][ C1] ---- [ 95.133669][ C1] lock(&(&local->client_conns_lock)->rlock); [ 95.139806][ C1] [ 95.143255][ C1] lock(&(&local->client_conns_lock)->rlock); [ 95.150173][ C1] [ 95.150173][ C1] *** DEADLOCK *** [ 95.150173][ C1] [ 95.158343][ C1] 1 lock held by swapper/1/0: [ 95.163112][ C1] #0: ffffffff89babe80 (rcu_callback){....}, at: rcu_core+0x562/0x1390 [ 95.171463][ C1] [ 95.171463][ C1] stack backtrace: [ 95.177408][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-syzkaller #0 [ 95.184951][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.195006][ C1] Call Trace: [ 95.198331][ C1] [ 95.201186][ C1] dump_stack+0x197/0x210 [ 95.205539][ C1] print_usage_bug.cold+0x327/0x378 [ 95.210736][ C1] mark_lock+0xbb4/0x1220 [ 95.215045][ C1] ? check_usage_backwards+0x330/0x330 [ 95.220510][ C1] __lock_acquire+0x1e8e/0x4a00 [ 95.225386][ C1] ? find_held_lock+0x35/0x130 [ 95.230170][ C1] ? __kasan_check_read+0x11/0x20 [ 95.235203][ C1] ? mark_lock+0xc2/0x1220 [ 95.239616][ C1] ? mark_held_locks+0xf0/0xf0 [ 95.244478][ C1] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 95.250268][ C1] lock_acquire+0x190/0x410 [ 95.254774][ C1] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 95.260486][ C1] _raw_spin_lock+0x2f/0x40 [ 95.264988][ C1] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 95.270430][ C1] rxrpc_put_client_conn+0x6ed/0xc90 [ 95.275721][ C1] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 95.281175][ C1] rxrpc_rcu_destroy_call+0xbd/0x200 [ 95.286461][ C1] rcu_core+0x5e1/0x1390 [ 95.290692][ C1] ? __rcu_read_unlock+0x700/0x700 [ 95.295785][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 95.301320][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 95.307291][ C1] ? run_rebalance_domains+0x227/0x2d0 [ 95.312853][ C1] rcu_core_si+0x9/0x10 [ 95.317055][ C1] __do_softirq+0x262/0x98c [ 95.321732][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 95.326566][ C1] irq_exit+0x19b/0x1e0 [ 95.330716][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 95.336247][ C1] apic_timer_interrupt+0xf/0x20 [ 95.341168][ C1] [ 95.344096][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 95.349451][ C1] Code: b8 43 cb f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 24 bf 5f 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 bf 5f 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 4e 19 7a f9 e8 e9 [ 95.369049][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 95.377463][ C1] RAX: 1ffffffff13675b2 RBX: ffff8880a99fc340 RCX: 0000000000000000 [ 95.385563][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fcbd4 [ 95.393527][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fc340 R09: 0000000000000000 [ 95.401587][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 95.409552][ C1] R13: ffffffff8aa3e080 R14: 0000000000000000 R15: 0000000000000001 [ 95.417535][ C1] ? default_idle+0x4e/0x360 [ 95.422146][ C1] arch_cpu_idle+0xa/0x10 [ 95.426826][ C1] default_idle_call+0x84/0xb0 [ 95.431741][ C1] do_idle+0x3c8/0x6e0 [ 95.435851][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 95.440861][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 95.446673][ C1] ? complete+0x61/0x80 [ 95.450811][