[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   40.501854] random: sshd: uninitialized urandom read (32 bytes read)
[   40.878758] kauditd_printk_skb: 9 callbacks suppressed
[   40.878766] audit: type=1400 audit(1555436517.209:35): avc:  denied  { map } for  pid=6827 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
[   40.931882] random: sshd: uninitialized urandom read (32 bytes read)
[   41.437961] random: sshd: uninitialized urandom read (32 bytes read)
[   41.610194] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts.
[   47.180780] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   47.297500] audit: type=1400 audit(1555436523.629:36): avc:  denied  { map } for  pid=6839 comm="syz-executor505" path="/root/syz-executor505751706" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[   47.302300] kasan: CONFIG_KASAN_INLINE enabled
[   47.328395] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   47.335869] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   47.342075] Modules linked in:
[   47.345242] CPU: 1 PID: 6839 Comm: syz-executor505 Not tainted 4.14.111 #1
[   47.352226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.361552] task: ffff88808a9ea240 task.stack: ffff888081e68000
[   47.367586] RIP: 0010:refcount_sub_and_test+0x2b/0xf0
[   47.372747] RSP: 0018:ffff888081e6fa68 EFLAGS: 00010202
[   47.378084] RAX: dffffc0000000000 RBX: ffff888092859a40 RCX: ffffffff842582d0
[   47.385327] RDX: 0000000000000004 RSI: 0000000000000020 RDI: 0000000000000001
[   47.392574] RBP: ffff888081e6fa90 R08: 000000004f3c8ce9 R09: ffff88808a9eab08
[   47.399816] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000020
[   47.407066] R13: 0000000000000001 R14: ffff888092859a54 R15: 0000000000000000
[   47.414311] FS:  0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
[   47.422508] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.428361] CR2: 000055bee90fb190 CR3: 000000000766a000 CR4: 00000000001406e0
[   47.435609] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.442852] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.450096] Call Trace:
[   47.452663]  refcount_dec_and_test+0x1b/0x20
[   47.457045]  vb2_vmalloc_put+0x18/0x70
[   47.460909]  __vb2_buf_mem_free+0x106/0x1e0
[   47.465215]  ? vb2_vmalloc_dmabuf_ops_attach+0x3f0/0x3f0
[   47.470636]  __vb2_queue_free+0x63a/0x7e0
[   47.474760]  vb2_core_queue_release+0x64/0x80
[   47.479225]  _vb2_fop_release+0x1cf/0x2a0
[   47.483347]  vb2_fop_release+0x75/0xc0
[   47.487207]  vivid_fop_release+0x180/0x3f0
[   47.491412]  ? vivid_remove+0x3d0/0x3d0
[   47.495357]  ? dev_debug_store+0xe0/0xe0
[   47.499390]  v4l2_release+0xfb/0x190
[   47.503077]  __fput+0x277/0x7a0
[   47.506336]  ____fput+0x16/0x20
[   47.509762]  task_work_run+0x119/0x190
[   47.513623]  do_exit+0x7df/0x2c10
[   47.517050]  ? do_vfs_ioctl+0xef/0x1070
[   47.520999]  ? ioctl_preallocate+0x1c0/0x1c0
[   47.525379]  ? putname+0x51/0x120
[   47.528804]  ? mm_update_next_owner+0x5d0/0x5d0
[   47.533451]  ? do_sys_open+0x221/0x430
[   47.537310]  do_group_exit+0x111/0x330
[   47.541175]  SyS_exit_group+0x1d/0x20
[   47.544948]  ? do_group_exit+0x330/0x330
[   47.548982]  do_syscall_64+0x1eb/0x630
[   47.552846]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   47.557663]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   47.562833] RIP: 0033:0x442cc8
[   47.565999] RSP: 002b:00007ffe9e9455c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   47.573679] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442cc8
[   47.580923] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   47.588167] RBP: 00000000004c25e8 R08: 00000000000000e7 R09: ffffffffffffffd0
[   47.595410] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   47.602652] R13: 00000000006d4180 R14: 0000000000000000 R15: 0000000000000000
[   47.609898] Code: 55 48 89 e5 41 56 41 55 41 89 fd 41 54 49 89 f4 53 48 83 ec 08 e8 96 e1 85 fe 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
[   47.628967] RIP: refcount_sub_and_test+0x2b/0xf0 RSP: ffff888081e6fa68
[   47.635938] ---[ end trace 6833091c11894b6e ]---
[   47.641095] Kernel panic - not syncing: Fatal exception
[   47.647119] Kernel Offset: disabled
[   47.650730] Rebooting in 86400 seconds..