Warning: Permanently added '10.128.0.83' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 113.827003][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 113.827021][ T27] audit: type=1400 audit(1581194400.525:42): avc: denied { map } for pid=10656 comm="syz-executor978" path="/root/syz-executor978114247" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 113.843115][T10657] IPVS: ftp: loaded support on port[0] = 21 [ 113.937485][ C1] [ 113.939845][ C1] ================================ [ 113.944952][ C1] WARNING: inconsistent lock state [ 113.950157][ C1] 5.5.0-syzkaller #0 Not tainted [ 113.955200][ C1] -------------------------------- [ 113.960303][ C1] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 113.967134][ C1] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 113.973098][ C1] ffff88809a8529c8 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x6ed/0xc90 [ 113.984030][ C1] {SOFTIRQ-ON-W} state was registered at: [ 113.989844][ C1] lock_acquire+0x190/0x410 [ 113.994535][ C1] _raw_spin_lock+0x2f/0x40 [ 113.999119][ C1] rxrpc_connect_call+0x358/0x4e30 [ 114.004387][ C1] rxrpc_new_client_call+0x9c0/0x1ad0 [ 114.009846][ C1] rxrpc_do_sendmsg+0xffa/0x1d5f [ 114.014890][ C1] rxrpc_sendmsg+0x4d6/0x5f0 [ 114.019571][ C1] sock_sendmsg+0xd7/0x130 [ 114.024225][ C1] ____sys_sendmsg+0x358/0x880 [ 114.029069][ C1] ___sys_sendmsg+0x100/0x170 [ 114.033856][ C1] __sys_sendmmsg+0x1bf/0x4d0 [ 114.038611][ C1] __x64_sys_sendmmsg+0x9d/0x100 [ 114.043732][ C1] do_syscall_64+0xfa/0x790 [ 114.048307][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 114.054402][ C1] irq event stamp: 125008 [ 114.058729][ C1] hardirqs last enabled at (125008): [] _raw_spin_unlock_irqrestore+0x66/0xe0 [ 114.069999][ C1] hardirqs last disabled at (125007): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 114.080052][ C1] softirqs last enabled at (124976): [] _local_bh_enable+0x1c/0x30 [ 114.089589][ C1] softirqs last disabled at (124977): [] irq_exit+0x19b/0x1e0 [ 114.098695][ C1] [ 114.098695][ C1] other info that might help us debug this: [ 114.106742][ C1] Possible unsafe locking scenario: [ 114.106742][ C1] [ 114.115255][ C1] CPU0 [ 114.118713][ C1] ---- [ 114.122087][ C1] lock(&(&local->client_conns_lock)->rlock); [ 114.128366][ C1] [ 114.131800][ C1] lock(&(&local->client_conns_lock)->rlock); [ 114.138109][ C1] [ 114.138109][ C1] *** DEADLOCK *** [ 114.138109][ C1] [ 114.146243][ C1] 1 lock held by swapper/1/0: [ 114.151047][ C1] #0: ffffffff89bac140 (rcu_callback){....}, at: rcu_core+0x562/0x1390 [ 114.159416][ C1] [ 114.159416][ C1] stack backtrace: [ 114.165291][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-syzkaller #0 [ 114.172821][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.182919][ C1] Call Trace: [ 114.186191][ C1] [ 114.189091][ C1] dump_stack+0x197/0x210 [ 114.193429][ C1] print_usage_bug.cold+0x327/0x378 [ 114.198704][ C1] mark_lock+0xbb4/0x1220 [ 114.203026][ C1] ? put_cred_rcu+0x2b6/0x4b0 [ 114.207700][ C1] ? check_usage_backwards+0x330/0x330 [ 114.213150][ C1] ? rcu_core_si+0x9/0x10 [ 114.217484][ C1] __lock_acquire+0x1e8e/0x4a00 [ 114.222319][ C1] ? find_held_lock+0x35/0x130 [ 114.227067][ C1] ? __kasan_check_read+0x11/0x20 [ 114.232090][ C1] ? mark_lock+0xc2/0x1220 [ 114.236502][ C1] ? mark_held_locks+0xf0/0xf0 [ 114.241257][ C1] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 114.247057][ C1] lock_acquire+0x190/0x410 [ 114.251558][ C1] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 114.257150][ C1] _raw_spin_lock+0x2f/0x40 [ 114.261657][ C1] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 114.267275][ C1] rxrpc_put_client_conn+0x6ed/0xc90 [ 114.272585][ C1] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 114.278068][ C1] rxrpc_rcu_destroy_call+0xbd/0x200 [ 114.283473][ C1] rcu_core+0x5e1/0x1390 [ 114.287779][ C1] ? __rcu_read_unlock+0x700/0x700 [ 114.294179][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 114.299720][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 114.305716][ C1] ? run_rebalance_domains+0x227/0x2d0 [ 114.311199][ C1] rcu_core_si+0x9/0x10 [ 114.315406][ C1] __do_softirq+0x262/0x98c [ 114.319903][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 114.324747][ C1] irq_exit+0x19b/0x1e0 [ 114.328899][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 114.334450][ C1] apic_timer_interrupt+0xf/0x20 [ 114.339367][ C1] [ 114.342287][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 114.347644][ C1] Code: d8 66 c6 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d d4 c9 5a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d c4 c9 5a 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 0e 26 75 f9 e8 09 [ 114.367340][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 114.376007][ C1] RAX: 1ffffffff1367612 RBX: ffff8880a9a0a340 RCX: 0000000000000000 [ 114.383965][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a9a0abd4 [ 114.391934][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a9a0a340 R09: 0000000000000000 [ 114.399893][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 114.407852][ C1] R13: ffffffff8aa58b80 R14: 0000000000000000 R15: 0000000000000001 [ 114.415837][ C1] ? default_idle+0x4e/0x360 [ 114.420538][ C1] arch_cpu_idle+0xa/0x10 [ 114.424869][ C1] default_idle_call+0x84/0xb0 [ 114.430192][ C1] do_idle+0x3c8/0x6e0 [ 114.434293][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 114.439317][ C1]