[ 97.018811][ T27] audit: type=1800 audit(1581202944.693:36): pid=10615 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 97.826969][ T27] audit: type=1400 audit(1581202945.623:37): avc: denied { watch } for pid=10709 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.195' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 106.565362][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 106.565380][ T27] audit: type=1400 audit(1581202954.363:42): avc: denied { map } for pid=10805 comm="syz-executor658" path="/root/syz-executor658788049" 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 [ 106.582326][T10806] IPVS: ftp: loaded support on port[0] = 21 [ 106.668921][ C0] [ 106.671356][ C0] ================================ [ 106.676610][ C0] WARNING: inconsistent lock state [ 106.681711][ C0] 5.5.0-syzkaller #0 Not tainted [ 106.686688][ C0] -------------------------------- [ 106.691876][ C0] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 106.698996][ C0] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 106.704967][ C0] ffff88808a67b9c8 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x6ed/0xc90 [ 106.716009][ C0] {SOFTIRQ-ON-W} state was registered at: [ 106.721730][ C0] lock_acquire+0x190/0x410 [ 106.726314][ C0] _raw_spin_lock+0x2f/0x40 [ 106.730896][ C0] rxrpc_connect_call+0x358/0x4e30 [ 106.736086][ C0] rxrpc_new_client_call+0x9c0/0x1ad0 [ 106.741539][ C0] rxrpc_do_sendmsg+0xffa/0x1d5f [ 106.746559][ C0] rxrpc_sendmsg+0x4d6/0x5f0 [ 106.751220][ C0] sock_sendmsg+0xd7/0x130 [ 106.755813][ C0] ____sys_sendmsg+0x358/0x880 [ 106.760709][ C0] ___sys_sendmsg+0x100/0x170 [ 106.765546][ C0] __sys_sendmmsg+0x1bf/0x4d0 [ 106.770564][ C0] __x64_sys_sendmmsg+0x9d/0x100 [ 106.775573][ C0] do_syscall_64+0xfa/0x790 [ 106.780162][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 106.786232][ C0] irq event stamp: 163422 [ 106.790551][ C0] hardirqs last enabled at (163422): [] _raw_spin_unlock_irqrestore+0x66/0xe0 [ 106.801492][ C0] hardirqs last disabled at (163421): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 106.811830][ C0] softirqs last enabled at (163346): [] _local_bh_enable+0x1c/0x30 [ 106.821363][ C0] softirqs last disabled at (163347): [] irq_exit+0x19b/0x1e0 [ 106.830366][ C0] [ 106.830366][ C0] other info that might help us debug this: [ 106.838430][ C0] Possible unsafe locking scenario: [ 106.838430][ C0] [ 106.845987][ C0] CPU0 [ 106.849340][ C0] ---- [ 106.852606][ C0] lock(&(&local->client_conns_lock)->rlock); [ 106.858918][ C0] [ 106.862372][ C0] lock(&(&local->client_conns_lock)->rlock); [ 106.868770][ C0] [ 106.868770][ C0] *** DEADLOCK *** [ 106.868770][ C0] [ 106.876923][ C0] 1 lock held by swapper/0/0: [ 106.881744][ C0] #0: ffffffff89bac140 (rcu_callback){....}, at: rcu_core+0x562/0x1390 [ 106.890353][ C0] [ 106.890353][ C0] stack backtrace: [ 106.896306][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-syzkaller #0 [ 106.904065][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.914115][ C0] Call Trace: [ 106.917552][ C0] [ 106.920409][ C0] dump_stack+0x197/0x210 [ 106.924800][ C0] print_usage_bug.cold+0x327/0x378 [ 106.929992][ C0] mark_lock+0xbb4/0x1220 [ 106.934555][ C0] ? kfree+0x10a/0x2c0 [ 106.938621][ C0] ? check_usage_backwards+0x330/0x330 [ 106.944077][ C0] ? __nf_hook_entries_free+0x31/0x40 [ 106.949443][ C0] __lock_acquire+0x1e8e/0x4a00 [ 106.954370][ C0] ? find_held_lock+0x35/0x130 [ 106.959143][ C0] ? __kasan_check_read+0x11/0x20 [ 106.964291][ C0] ? mark_lock+0xc2/0x1220 [ 106.968806][ C0] ? mark_held_locks+0xf0/0xf0 [ 106.973572][ C0] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 106.979489][ C0] lock_acquire+0x190/0x410 [ 106.984121][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 106.989750][ C0] _raw_spin_lock+0x2f/0x40 [ 106.994274][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 106.999727][ C0] rxrpc_put_client_conn+0x6ed/0xc90 [ 107.005032][ C0] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 107.010709][ C0] rxrpc_rcu_destroy_call+0xbd/0x200 [ 107.015995][ C0] rcu_core+0x5e1/0x1390 [ 107.020329][ C0] ? __rcu_read_unlock+0x700/0x700 [ 107.025453][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 107.030986][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 107.037085][ C0] ? run_rebalance_domains+0x227/0x2d0 [ 107.042641][ C0] rcu_core_si+0x9/0x10 [ 107.046938][ C0] __do_softirq+0x262/0x98c [ 107.051623][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 107.056462][ C0] irq_exit+0x19b/0x1e0 [ 107.060618][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 107.066161][ C0] apic_timer_interrupt+0xf/0x20 [ 107.071136][ C0] [ 107.074136][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 107.079495][ C0] 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 [ 107.099323][ C0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 107.108388][ C0] RAX: 1ffffffff1367612 RBX: ffffffff89a7a440 RCX: 0000000000000000 [ 107.116443][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff89a7acd4 [ 107.124519][ C0] RBP: ffffffff89a07d18 R08: ffffffff89a7a440 R09: 0000000000000000 [ 107.132475][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 107.140511][ C0] R13: ffffffff8aa58b80 R14: 0000000000000000 R15: 0000000000000000 [ 107.148493][ C0] ? default_idle+0x4e/0x360 [ 107.153185][ C0] arch_cpu_idle+0xa/0x10 [ 107.157536][ C0] default_idle_call+0x84/0xb0 [ 107.162908][ C0] do_idle+0x3c8/0x6e0 [ 107.167003][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 107.173224][ C0] ? trace_hardirqs_on+0x67/0x240 [ 107.178240][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 107.184494][ C0] ? debug_smp_processor_id+0x33/0x18a [ 107.189951][ C0] cpu_startup_entry+0x1b/0x20 [ 107.194787][ C0] rest_init+0x23b/0x371 [ 107.199019][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 107.205446][ C0] arch_call_rest_init+0xe/0x1b [ 107.210289][ C0] start_kernel+0x886/0x8c5 [ 107.214790][ C0] ? mem_encrypt_init+0xb/0xb [ 107.219811][