[   40.586596] audit: type=1800 audit(1581980070.962:31): pid=7870 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[   40.623214] audit: type=1800 audit(1581980070.962:32): pid=7870 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=2450 res=0
Starting mcstransd: 
[....] 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[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   52.477052] kauditd_printk_skb: 3 callbacks suppressed
[   52.477068] audit: type=1400 audit(1581980082.912:36): avc:  denied  { map } for  pid=8058 comm="syz-executor818" path="/root/syz-executor818895941" 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
[   52.492195] IPVS: ftp: loaded support on port[0] = 21
[   52.583671] 
[   52.585489] ================================
[   52.590140] WARNING: inconsistent lock state
[   52.594621] 4.19.104-syzkaller #0 Not tainted
[   52.599143] --------------------------------
[   52.603884] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[   52.610061] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[   52.615458] 00000000329728e0 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20
[   52.625724] {SOFTIRQ-ON-W} state was registered at:
[   52.630731]   lock_acquire+0x16f/0x3f0
[   52.634674]   _raw_spin_lock+0x2f/0x40
[   52.638869]   rxrpc_connect_call+0x351/0x4920
[   52.643400]   rxrpc_new_client_call+0x8e7/0x1880
[   52.648146]   rxrpc_do_sendmsg+0xfc3/0x1ca3
[   52.652477]   rxrpc_sendmsg+0x4a0/0x5b0
[   52.656463]   sock_sendmsg+0xd7/0x130
[   52.660245]   ___sys_sendmsg+0x3e2/0x920
[   52.664494]   __sys_sendmmsg+0x1bf/0x4e0
[   52.668547]   __x64_sys_sendmmsg+0x9d/0x100
[   52.672852]   do_syscall_64+0xfd/0x620
[   52.676779]   entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.682206] irq event stamp: 172194
[   52.685912] hardirqs last  enabled at (172194): [<ffffffff87553a3b>] _raw_spin_unlock_irqrestore+0x6b/0xe0
[   52.695692] hardirqs last disabled at (172193): [<ffffffff87553ccf>] _raw_spin_lock_irqsave+0x6f/0xcd
[   52.705043] softirqs last  enabled at (172078): [<ffffffff81402cdc>] _local_bh_enable+0x1c/0x30
[   52.714702] softirqs last disabled at (172079): [<ffffffff81405860>] irq_exit+0x180/0x1d0
[   52.723363] 
[   52.723363] other info that might help us debug this:
[   52.730017]  Possible unsafe locking scenario:
[   52.730017] 
[   52.736488]        CPU0
[   52.739049]        ----
[   52.741610]   lock(&(&local->client_conns_lock)->rlock);
[   52.747065]   <Interrupt>
[   52.750088]     lock(&(&local->client_conns_lock)->rlock);
[   52.755695] 
[   52.755695]  *** DEADLOCK ***
[   52.755695] 
[   52.761857] 1 lock held by swapper/0/0:
[   52.765810]  #0: 000000007a2471e7 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30
[   52.774888] 
[   52.774888] stack backtrace:
[   52.779406] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.104-syzkaller #0
[   52.786551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.797063] Call Trace:
[   52.799630]  <IRQ>
[   52.801771]  dump_stack+0x197/0x210
[   52.805406]  print_usage_bug.cold+0x330/0x42a
[   52.809936]  ? save_stack_trace+0x1a/0x20
[   52.814078]  mark_lock+0xd1b/0x1370
[   52.817693]  ? check_usage_backwards+0x340/0x340
[   52.822437]  __lock_acquire+0xc62/0x49c0
[   52.826500]  ? mark_held_locks+0x100/0x100
[   52.830726]  ? save_stack+0x45/0xd0
[   52.834343]  ? __kasan_slab_free+0x102/0x150
[   52.838749]  ? kasan_slab_free+0xe/0x10
[   52.843138]  ? kfree+0xcf/0x220
[   52.846681]  ? mark_held_locks+0x100/0x100
[   52.850911]  ? find_held_lock+0x35/0x130
[   52.854959]  ? debug_object_deactivate+0x1e4/0x360
[   52.859932]  ? mark_held_locks+0x100/0x100
[   52.864159]  ? debug_object_deactivate+0x1e4/0x360
[   52.869446]  ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[   52.874567]  ? lockdep_hardirqs_on+0x19b/0x5d0
[   52.879159]  lock_acquire+0x16f/0x3f0
[   52.882953]  ? rxrpc_put_client_conn+0x683/0xc20
[   52.887770]  _raw_spin_lock+0x2f/0x40
[   52.891583]  ? rxrpc_put_client_conn+0x683/0xc20
[   52.896447]  rxrpc_put_client_conn+0x683/0xc20
[   52.902325]  ? rxrpc_rcu_destroy_call+0xbd/0x200
[   52.907081]  ? rxrpc_process_call.cold+0x20/0x20
[   52.911841]  rxrpc_rcu_destroy_call+0xbd/0x200
[   52.916501]  rcu_process_callbacks+0xba0/0x1a30
[   52.921254]  ? __rcu_read_unlock+0x170/0x170
[   52.925698]  __do_softirq+0x25c/0x921
[   52.930006]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   52.935528]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   52.941065]  irq_exit+0x180/0x1d0
[   52.944618]  smp_apic_timer_interrupt+0x13b/0x550
[   52.949459]  apic_timer_interrupt+0xf/0x20
[   52.953727]  </IRQ>
[   52.955957] RIP: 0010:native_safe_halt+0xe/0x10
[   52.960616] Code: ff ff 48 89 df e8 62 aa 4d fa eb 82 e9 07 00 00 00 0f 00 2d 74 c2 52 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 64 c2 52 00 fb f4 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 6e 7e 04 fa e8 f9
[   52.980080] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[   52.987895] RAX: 1ffffffff11e4aec RBX: ffffffff88e79ec0 RCX: 0000000000000000
[   52.995156] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c
[   53.002522] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000
[   53.009823] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   53.017080] R13: ffffffff88f25750 R14: 0000000000000000 R15: ffffffff88e79ec0
[   53.027561]  ? default_idle+0x4e/0x320
[   53.031436]  arch_cpu_idle+0xa/0x10
[   53.035110]  default_idle_call+0x36/0x90
[   53.039157]  do_idle+0x30c/0x4d0
[   53.042768]  ? arch_cpu_idle_exit+0x80/0x80
[   53.047212]  ? check_preemption_disabled+0x48/0x290
[   53.052877]  cpu_startup_entry+0xc8/0xe0
[   53.056933]  ? cpu_in_idle+0x20/0x20
[   53.060632]  rest_init+0x219/0x222
[   53.064212]  ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[   53.070696]  start_kernel+0x7ec/0x825
[   53.075492]  ? mem_encrypt_init+0xb/0xb
[   53.079496]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   53.0850