[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[ 113.069528][ T27] audit: type=1400 audit(1581137025.157:37): avc: denied { watch } for pid=10973 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 [ 113.093490][ T27] audit: type=1400 audit(1581137025.157:38): avc: denied { watch } for pid=10973 comm="restorecond" path="/etc/selinux/restorecond.conf" dev="sda1" ino=2232 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [ 113.233939][ T27] audit: type=1800 audit(1581137025.327:39): pid=10878 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 121.313751][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 121.313769][ T27] audit: type=1400 audit(1581137033.407:42): avc: denied { map } for pid=11070 comm="syz-executor027" path="/root/syz-executor027548484" 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 [ 121.329077][T11071] IPVS: ftp: loaded support on port[0] = 21 [ 121.432626][ C0] [ 121.434971][ C0] ================================ [ 121.440053][ C0] WARNING: inconsistent lock state [ 121.445139][ C0] 5.5.0-syzkaller #0 Not tainted [ 121.450049][ C0] -------------------------------- [ 121.455132][ C0] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 121.462022][ C0] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 121.467982][ C0] ffff8880975621c8 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x6ed/0xc90 [ 121.478904][ C0] {SOFTIRQ-ON-W} state was registered at: [ 121.484609][ C0] lock_acquire+0x190/0x410 [ 121.489189][ C0] _raw_spin_lock+0x2f/0x40 [ 121.493755][ C0] rxrpc_connect_call+0x358/0x4e30 [ 121.498924][ C0] rxrpc_new_client_call+0x9c0/0x1ad0 [ 121.504372][ C0] rxrpc_do_sendmsg+0xffa/0x1d5f [ 121.509385][ C0] rxrpc_sendmsg+0x4d6/0x5f0 [ 121.514085][ C0] sock_sendmsg+0xd7/0x130 [ 121.518571][ C0] ____sys_sendmsg+0x358/0x880 [ 121.523437][ C0] ___sys_sendmsg+0x100/0x170 [ 121.528174][ C0] __sys_sendmmsg+0x1bf/0x4d0 [ 121.532912][ C0] __x64_sys_sendmmsg+0x9d/0x100 [ 121.537914][ C0] do_syscall_64+0xfa/0x790 [ 121.542488][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 121.548447][ C0] irq event stamp: 199504 [ 121.552757][ C0] hardirqs last enabled at (199504): [] _raw_spin_unlock_irqrestore+0x66/0xe0 [ 121.563230][ C0] hardirqs last disabled at (199503): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 121.573288][ C0] softirqs last enabled at (199424): [] _local_bh_enable+0x1c/0x30 [ 121.582815][ C0] softirqs last disabled at (199425): [] irq_exit+0x19b/0x1e0 [ 121.591801][ C0] [ 121.591801][ C0] other info that might help us debug this: [ 121.599857][ C0] Possible unsafe locking scenario: [ 121.599857][ C0] [ 121.607286][ C0] CPU0 [ 121.610658][ C0] ---- [ 121.613916][ C0] lock(&(&local->client_conns_lock)->rlock); [ 121.620050][ C0] [ 121.623534][ C0] lock(&(&local->client_conns_lock)->rlock); [ 121.629847][ C0] [ 121.629847][ C0] *** DEADLOCK *** [ 121.629847][ C0] [ 121.637977][ C0] 1 lock held by swapper/0/0: [ 121.642633][ C0] #0: ffffffff89bac140 (rcu_callback){....}, at: rcu_core+0x562/0x1390 [ 121.650957][ C0] [ 121.650957][ C0] stack backtrace: [ 121.656931][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-syzkaller #0 [ 121.664458][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.674491][ C0] Call Trace: [ 121.677753][ C0] [ 121.680587][ C0] dump_stack+0x197/0x210 [ 121.684895][ C0] print_usage_bug.cold+0x327/0x378 [ 121.690068][ C0] mark_lock+0xbb4/0x1220 [ 121.694431][ C0] ? kfree+0x10a/0x2c0 [ 121.698517][ C0] ? check_usage_backwards+0x330/0x330 [ 121.703994][ C0] ? __nf_hook_entries_free+0x31/0x40 [ 121.709347][ C0] __lock_acquire+0x1e8e/0x4a00 [ 121.714171][ C0] ? find_held_lock+0x35/0x130 [ 121.718912][ C0] ? __kasan_check_read+0x11/0x20 [ 121.723925][ C0] ? mark_lock+0xc2/0x1220 [ 121.728317][ C0] ? mark_held_locks+0xf0/0xf0 [ 121.733074][ C0] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 121.738862][ C0] lock_acquire+0x190/0x410 [ 121.743342][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 121.748780][ C0] _raw_spin_lock+0x2f/0x40 [ 121.753259][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 121.758708][ C0] rxrpc_put_client_conn+0x6ed/0xc90 [ 121.763985][ C0] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 121.769487][ C0] rxrpc_rcu_destroy_call+0xbd/0x200 [ 121.774879][ C0] rcu_core+0x5e1/0x1390 [ 121.779159][ C0] ? __rcu_read_unlock+0x700/0x700 [ 121.784260][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 121.789844][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 121.795823][ C0] ? run_rebalance_domains+0x227/0x2d0 [ 121.801267][ C0] rcu_core_si+0x9/0x10 [ 121.805409][ C0] __do_softirq+0x262/0x98c [ 121.809901][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 121.814740][ C0] irq_exit+0x19b/0x1e0 [ 121.818875][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 121.824410][ C0] apic_timer_interrupt+0xf/0x20 [ 121.829382][ C0] [ 121.832361][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 121.837717][ C0] Code: 48 70 c7 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 44 d3 5b 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 34 d3 5b 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 7e 2f 76 f9 e8 19 [ 121.857307][ C0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 121.865870][ C0] RAX: 1ffffffff1367612 RBX: ffffffff89a7a440 RCX: 0000000000000000 [ 121.873873][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff89a7acd4 [ 121.881830][ C0] RBP: ffffffff89a07d18 R08: ffffffff89a7a440 R09: 0000000000000000 [ 121.889788][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 121.897741][ C0] R13: ffffffff8aa52400 R14: 0000000000000000 R15: 0000000000000000 [ 121.905718][ C0] ? default_idle+0x4e/0x360 [ 121.910314][ C0] arch_cpu_idle+0xa/0x10 [ 121.914647][ C0] default_idle_call+0x84/0xb0 [ 121.919390][ C0] do_idle+0x3c8/0x6e0 [ 121.923497][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 121.928511][ C0] ? trace_hardirqs_on+0x67/0x240 [ 121.933529][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.939803][ C0] ? debug_smp_processor_id+0x33/0x18a [ 121.945256][ C0] cpu_startup_entry+0x1b/0x20 [ 121.950011][ C0] rest_init+0x23b/0x371 [ 121.954235][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 121.960451][ C0] arch_call_rest_init+0xe/0x1b [ 121.965285][ C0] start_kernel+0x886/0x8c5 [ 121.969782][ C0] ? mem_encrypt_init+0xb/0xb [ 121.974439][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.980656][ C0] ? x86_family+0x41/0x50 [