[....] Starting enhanced syslogd: rsyslogd[   11.939269] audit: type=1400 audit(1515561783.429:5): avc:  denied  { syslog } for  pid=3341 comm="rsyslogd" capability=34  scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1
[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
Starting mcstransd: 
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   16.439279] audit: type=1400 audit(1515561787.930:6): avc:  denied  { map } for  pid=3480 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 '10.128.0.32' (ECDSA) to the list of known hosts.
[   22.705727] audit: type=1400 audit(1515561794.196:7): avc:  denied  { map } for  pid=3495 comm="syzkaller357056" path="/root/syzkaller357056623" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
executing program
[   22.890240] audit: type=1400 audit(1515561794.381:8): avc:  denied  { map } for  pid=3496 comm="syzkaller357056" path="/dev/ashmem" dev="devtmpfs" ino=1166 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1
[   22.890635] 
[   22.890637] ======================================================
[   22.890639] WARNING: possible circular locking dependency detected
[   22.890643] 4.15.0-rc7+ #165 Not tainted
[   22.890644] ------------------------------------------------------
[   22.890647] syzkaller357056/3496 is trying to acquire lock:
[   22.890649]  (&sb->s_type->i_mutex_key#11){++++}, at: [<00000000be3ef2f3>] shmem_file_llseek+0xef/0x240
[   22.890668] 
[   22.890668] but task is already holding lock:
[   22.890669]  (ashmem_mutex){+.+.}, at: [<0000000052bb7af2>] ashmem_llseek+0x56/0x1f0
[   22.890687] 
[   22.890687] which lock already depends on the new lock.
[   22.890687] 
[   22.890689] 
[   22.890689] the existing dependency chain (in reverse order) is:
[   22.890690] 
[   22.890690] -> #2 (ashmem_mutex){+.+.}:
[   22.890702]        __mutex_lock+0x16f/0x1a80
[   22.890707]        mutex_lock_nested+0x16/0x20
[   22.890711]        ashmem_mmap+0x53/0x410
[   22.890719]        mmap_region+0xa99/0x15a0
[   22.890724]        do_mmap+0x6c0/0xe00
[   22.890729]        vm_mmap_pgoff+0x1de/0x280
[   22.890734]        SyS_mmap_pgoff+0x462/0x5f0
[   22.890741]        do_fast_syscall_32+0x3ee/0xf9d
[   22.890746]        entry_SYSENTER_compat+0x54/0x63
[   22.890747] 
[   22.890747] -> #1 (&mm->mmap_sem){++++}:
[   22.890756]        __might_fault+0x13a/0x1d0
[   22.890762]        _copy_to_user+0x2c/0xc0
[   22.890769]        filldir+0x1a7/0x320
[   22.890774]        dcache_readdir+0x12d/0x5e0
[   22.890779]        iterate_dir+0x1ca/0x530
[   22.890783]        SyS_getdents+0x225/0x450
[   22.890789]        entry_SYSCALL_64_fastpath+0x23/0x9a
[   22.890790] 
[   22.890790] -> #0 (&sb->s_type->i_mutex_key#11){++++}:
[   22.890803]        lock_acquire+0x1d5/0x580
[   22.890807]        down_write+0x87/0x120
[   22.890812]        shmem_file_llseek+0xef/0x240
[   22.890817]        vfs_llseek+0xa2/0xd0
[   22.890821]        ashmem_llseek+0xe7/0x1f0
[   22.890826]        compat_SyS_lseek+0xeb/0x170
[   22.890831]        do_fast_syscall_32+0x3ee/0xf9d
[   22.890836]        entry_SYSENTER_compat+0x54/0x63
[   22.890837] 
[   22.890837] other info that might help us debug this:
[   22.890837] 
[   22.890838] Chain exists of:
[   22.890838]   &sb->s_type->i_mutex_key#11 --> &mm->mmap_sem --> ashmem_mutex
[   22.890838] 
[   22.890848]  Possible unsafe locking scenario:
[   22.890848] 
[   22.890849]        CPU0                    CPU1
[   22.890850]        ----                    ----
[   22.890851]   lock(ashmem_mutex);
[   22.890855]                                lock(&mm->mmap_sem);
[   22.890858]                                lock(ashmem_mutex);
[   22.890861]   lock(&sb->s_type->i_mutex_key#11);
[   22.890866] 
[   22.890866]  *** DEADLOCK ***
[   22.890866] 
[   22.890869] 1 lock held by syzkaller357056/3496:
[   22.890871]  #0:  (ashmem_mutex){+.+.}, at: [<0000000052bb7af2>] ashmem_llseek+0x56/0x1f0
[   22.890881] 
[   22.890881] stack backtrace:
[   22.890887] CPU: 0 PID: 3496 Comm: syzkaller357056 N