[ 42.409341] audit: type=1800 audit(1582210887.015:30): pid=7924 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
syzkaller login: [ 46.268844] kauditd_printk_skb: 4 callbacks suppressed
[ 46.268858] audit: type=1400 audit(1582210890.895:35): avc: denied { map } for pid=8096 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
Warning: Permanently added '10.128.0.238' (ECDSA) to the list of known hosts.
executing program
[ 53.007818] audit: type=1400 audit(1582210897.635:36): avc: denied { map } for pid=8108 comm="syz-executor662" path="/root/syz-executor662645861" 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
[ 53.021244] IPVS: ftp: loaded support on port[0] = 21
[ 53.112359]
[ 53.114014] ================================
[ 53.119267] WARNING: inconsistent lock state
[ 53.123709] 4.19.105-syzkaller #0 Not tainted
[ 53.128186] --------------------------------
[ 53.132720] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 53.138860] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[ 53.144143] 00000000727d0a00 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20
[ 53.154419] {SOFTIRQ-ON-W} state was registered at:
[ 53.159598] lock_acquire+0x16f/0x3f0
[ 53.163473] _raw_spin_lock+0x2f/0x40
[ 53.167359] rxrpc_connect_call+0x351/0x4920
[ 53.171858] rxrpc_new_client_call+0x8e7/0x1880
[ 53.176614] rxrpc_do_sendmsg+0xfc3/0x1ca3
[ 53.180922] rxrpc_sendmsg+0x4a0/0x5b0
[ 53.184928] sock_sendmsg+0xd7/0x130
[ 53.188737] ___sys_sendmsg+0x3e2/0x920
[ 53.192795] __sys_sendmmsg+0x1bf/0x4e0
[ 53.196839] __x64_sys_sendmmsg+0x9d/0x100
[ 53.201208] do_syscall_64+0xfd/0x620
[ 53.205153] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 53.210421] irq event stamp: 163788
[ 53.214048] hardirqs last enabled at (163788): [<ffffffff87549a3b>] _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 53.223844] hardirqs last disabled at (163787): [<ffffffff87549ccf>] _raw_spin_lock_irqsave+0x6f/0xcd
[ 53.233202] softirqs last enabled at (163772): [<ffffffff813fdc3c>] _local_bh_enable+0x1c/0x30
[ 53.242118] softirqs last disabled at (163773): [<ffffffff814007c0>] irq_exit+0x180/0x1d0
[ 53.251045]
[ 53.251045] other info that might help us debug this:
[ 53.257824] Possible unsafe locking scenario:
[ 53.257824]
[ 53.263915] CPU0
[ 53.266480] ----
[ 53.269060] lock(&(&local->client_conns_lock)->rlock);
[ 53.274499] <Interrupt>
[ 53.277388] lock(&(&local->client_conns_lock)->rlock);
[ 53.283015]
[ 53.283015] *** DEADLOCK ***
[ 53.283015]
[ 53.289072] 1 lock held by swapper/1/0:
[ 53.293026] #0: 0000000025b99283 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30
[ 53.301787]
[ 53.301787] stack backtrace:
[ 53.306334] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.105-syzkaller #0
[ 53.313488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 53.322849] Call Trace:
[ 53.325457] <IRQ>
[ 53.327604] dump_stack+0x197/0x210
[ 53.331283] print_usage_bug.cold+0x330/0x42a
[ 53.335779] ? save_stack_trace+0x1a/0x20
[ 53.339929] mark_lock+0xd1b/0x1370
[ 53.343591] ? check_usage_backwards+0x340/0x340
[ 53.348350] __lock_acquire+0xc62/0x49c0
[ 53.352425] ? mark_held_locks+0x100/0x100
[ 53.356659] ? __lock_acquire+0x6ee/0x49c0
[ 53.360897] ? mark_held_locks+0x100/0x100
[ 53.365163] ? find_held_lock+0x35/0x130
[ 53.369277] ? debug_object_deactivate+0x1e4/0x360
[ 53.374643] ? mark_held_locks+0x100/0x100
[ 53.379011] ? debug_object_deactivate+0x1e4/0x360
[ 53.383975] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 53.389084] ? lockdep_hardirqs_on+0x19b/0x5d0
[ 53.393666] lock_acquire+0x16f/0x3f0
[ 53.397464] ? rxrpc_put_client_conn+0x683/0xc20
[ 53.402311] _raw_spin_lock+0x2f/0x40
[ 53.406122] ? rxrpc_put_client_conn+0x683/0xc20
[ 53.410884] rxrpc_put_client_conn+0x683/0xc20
[ 53.415467] ? rxrpc_rcu_destroy_call+0xbd/0x200
[ 53.420281] ? rxrpc_process_call.cold+0x20/0x20
[ 53.425031] rxrpc_rcu_destroy_call+0xbd/0x200
[ 53.429612] rcu_process_callbacks+0xba0/0x1a30
[ 53.434608] ? __rcu_read_unlock+0x170/0x170
[ 53.439219] __do_softirq+0x25c/0x921
[ 53.443098] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 53.448646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 53.454348] irq_exit+0x180/0x1d0
[ 53.457796] smp_apic_timer_interrupt+0x13b/0x550
[ 53.462685] apic_timer_interrupt+0xf/0x20
[ 53.466905] </IRQ>
[ 53.469187] RIP: 0010:native_safe_halt+0xe/0x10
[ 53.473848] 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
[ 53.492740] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 53.500462] RAX: 1ffffffff11e4ad4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000
[ 53.507728] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c
[ 53.514989] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000
[ 53.522309] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[ 53.529588] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffff8880aa3a43c0
[ 53.536864] ? default_idle+0x4e/0x320
[ 53.540753] arch_cpu_idle+0xa/0x10
[ 53.544384] default_idle_call+0x36/0x90
[ 53.548461] do_idle+0x30c/0x4d0
[ 53.551809] ? trace_hardirqs_on+0x67/0x220
[ 53.556114] ? arch_cpu_idle_exit+0x80/0x80
[ 53.560419] ? _raw_spin_unlock_irqrestore+0xa4