[ 45.323977] audit: type=1800 audit(1582408237.151:29): pid=8035 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 45.368900] audit: type=1800 audit(1582408237.151:30): pid=8035 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
Starting mcstransd:
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 53.493108] kauditd_printk_skb: 5 callbacks suppressed
[ 53.493125] audit: type=1400 audit(1582408245.321:36): avc: denied { map } for pid=8221 comm="syz-executor244" path="/root/syz-executor244109383" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[ 53.512443] IPVS: ftp: loaded support on port[0] = 21
[ 53.592875]
[ 53.594573] ================================
[ 53.599006] WARNING: inconsistent lock state
[ 53.603403] 4.19.105-syzkaller #0 Not tainted
[ 53.607902] --------------------------------
[ 53.612306] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 53.618439] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[ 53.623792] 000000001d181535 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20
[ 53.634376] {SOFTIRQ-ON-W} state was registered at:
[ 53.639389] lock_acquire+0x16f/0x3f0
[ 53.643270] _raw_spin_lock+0x2f/0x40
[ 53.647302] rxrpc_connect_call+0x351/0x4920
[ 53.651815] rxrpc_new_client_call+0x8e7/0x1880
[ 53.656630] rxrpc_do_sendmsg+0xfc3/0x1ca3
[ 53.660939] rxrpc_sendmsg+0x4a0/0x5b0
[ 53.664922] sock_sendmsg+0xd7/0x130
[ 53.668726] ___sys_sendmsg+0x3e2/0x920
[ 53.672783] __sys_sendmmsg+0x1bf/0x4e0
[ 53.677087] __x64_sys_sendmmsg+0x9d/0x100
[ 53.681413] do_syscall_64+0xfd/0x620
[ 53.685409] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 53.690761] irq event stamp: 139448
[ 53.694554] hardirqs last enabled at (139448): [<ffffffff87549a3b>] _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 53.704351] hardirqs last disabled at (139447): [<ffffffff87549ccf>] _raw_spin_lock_irqsave+0x6f/0xcd
[ 53.713895] softirqs last enabled at (139340): [<ffffffff813fdc3c>] _local_bh_enable+0x1c/0x30
[ 53.722866] softirqs last disabled at (139341): [<ffffffff814007c0>] irq_exit+0x180/0x1d0
[ 53.731215]
[ 53.731215] other info that might help us debug this:
[ 53.737870] Possible unsafe locking scenario:
[ 53.737870]
[ 53.743915] CPU0
[ 53.746502] ----
[ 53.752591] lock(&(&local->client_conns_lock)->rlock);
[ 53.758034] <Interrupt>
[ 53.760772] lock(&(&local->client_conns_lock)->rlock);
[ 53.766384]
[ 53.766384] *** DEADLOCK ***
[ 53.766384]
[ 53.772435] 1 lock held by swapper/1/0:
[ 53.776525] #0: 00000000005b0313 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30
[ 53.785333]
[ 53.785333] stack backtrace:
[ 53.789828] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.105-syzkaller #0
[ 53.796910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 53.806374] Call Trace:
[ 53.808943] <IRQ>
[ 53.811092] dump_stack+0x197/0x210
[ 53.814719] print_usage_bug.cold+0x330/0x42a
[ 53.819272] ? save_stack_trace+0x1a/0x20
[ 53.823429] mark_lock+0xd1b/0x1370
[ 53.827046] ? check_usage_backwards+0x340/0x340
[ 53.831930] __lock_acquire+0xc62/0x49c0
[ 53.836069] ? mark_held_locks+0x100/0x100
[ 53.840299] ? __kasan_slab_free+0x102/0x150
[ 53.844692] ? kasan_slab_free+0xe/0x10
[ 53.848658] ? kmem_cache_free+0x86/0x260
[ 53.852800] ? put_cred_rcu+0x2b6/0x4b0
[ 53.856875] ? mark_held_locks+0x100/0x100
[ 53.861095] ? find_held_lock+0x35/0x130
[ 53.865142] ? debug_object_deactivate+0x1e4/0x360
[ 53.870085] ? mark_held_locks+0x100/0x100
[ 53.874313] ? debug_object_deactivate+0x1e4/0x360
[ 53.879245] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 53.884356] ? lockdep_hardirqs_on+0x19b/0x5d0
[ 53.888985] lock_acquire+0x16f/0x3f0
[ 53.892900] ? rxrpc_put_client_conn+0x683/0xc20
[ 53.898003] _raw_spin_lock+0x2f/0x40
[ 53.901798] ? rxrpc_put_client_conn+0x683/0xc20
[ 53.906550] rxrpc_put_client_conn+0x683/0xc20
[ 53.911174] ? rxrpc_rcu_destroy_call+0xbd/0x200
[ 53.916036] ? rxrpc_process_call.cold+0x20/0x20
[ 53.920855] rxrpc_rcu_destroy_call+0xbd/0x200
[ 53.925546] rcu_process_callbacks+0xba0/0x1a30
[ 53.930206] ? __rcu_read_unlock+0x170/0x170
[ 53.934650] __do_softirq+0x25c/0x921
[ 53.938474] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 53.944004] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 53.949628] irq_exit+0x180/0x1d0
[ 53.953090] smp_apic_timer_interrupt+0x13b/0x550
[ 53.957921] apic_timer_interrupt+0xf/0x20
[ 53.962136] </IRQ>
[ 53.964368] RIP: 0010:native_safe_halt+0xe/0x10
[ 53.969032] Code: ff ff 48 89 df e8 92 f8 4d fa eb 82 e9 07 00 00 00 0f 00 2d 74 61 53 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 64 61 53 00 fb f4 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be cc 04 fa e8 d9
[ 53.988036] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 53.996254] RAX: 1ffffffff11e4ad4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000
[ 54.003512] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c
[ 54.010823] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000
[ 54.018203] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[ 54.025463] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffff8880aa3a43c0
[ 54.032755] ? default_idle+0x4e/0x320
[ 54.036631] arch_cpu_idle+0xa/0x10
[ 54.040251] default_idle_call+0x36/0x90
[ 54.044320] do_idle+0x30c/0x4d0
[ 54.047683] ? trace_hardirqs_on+0x67/0x220
[ 54.052630] ? arch_cpu_idle_exit+0x80/0x80
[ 54.056939] ? _raw_spin_unlock_irqrestore+0xa4/0xe0
[ 54.062039] ? complete+0x61/0x80
[ 54.065517] cpu_startup_entry+0xc8/0xe0
[ 54.069564] ? cpu_in_idle+0x20/0x20
[ 54.073274] ? setup_APIC_timer+0x1aa/0x200
[ 54.077593] start_secondary+0x3e8/0x5b0
[ 54.081689] ? set_cpu_sibling_map+0x1860/0x1860
[ 54.086511] secondary_startup_64+0xa4/0xb0