audit: type=1400 audit(1521167210.651:7): avc:  denied  { map } for  pid=4211 comm="syzkaller117497" path="/root/syzkaller117497471" 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
IPVS: ftp: loaded support on port[0] = 21
audit: type=1400 audit(1521167210.701:8): avc:  denied  { map } for  pid=4212 comm="syzkaller117497" path="/dev/ashmem" dev="devtmpfs" ino=1080 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1
------------[ cut here ]------------
memory commitment underflow
WARNING: CPU: 0 PID: 4212 at mm/util.c:628 __vm_enough_memory+0x5a6/0x810 mm/util.c:626
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4212 Comm: syzkaller117497 Not tainted 4.16.0-rc5+ #355
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x24d lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x1f4/0x2b0 lib/bug.c:186
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:__vm_enough_memory+0x5a6/0x810 mm/util.c:626
RSP: 0018:ffff8801b6747638 EFLAGS: 00010286
RAX: dffffc0000000008 RBX: 1ffff10036ce8ecc RCX: ffffffff815acd3e
RDX: 0000000000000000 RSI: 1ffff10036ce8e77 RDI: 1ffff10036ce8e4c
RBP: ffff8801b67477e8 R08: 1ffff10036ce8e0e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801b67477c0
R13: ffffffff86fba560 R14: fff8000000000000 R15: dffffc0000000000
 security_vm_enough_memory_mm+0x90/0xb0 security/security.c:327
 shmem_acct_size mm/shmem.c:149 [inline]
 __shmem_file_setup+0x29c/0x6a0 mm/shmem.c:4203
 shmem_file_setup+0x2f/0x40 mm/shmem.c:4267
 ashmem_mmap+0x2da/0x410 drivers/staging/android/ashmem.c:385
 call_mmap include/linux/fs.h:1786 [inline]
 mmap_region+0xa99/0x15a0 mm/mmap.c:1705
 do_mmap+0x6c0/0xe00 mm/mmap.c:1483
 do_mmap_pgoff include/linux/mm.h:2223 [inline]
 vm_mmap_pgoff+0x1de/0x280 mm/util.c:355
 SYSC_mmap_pgoff mm/mmap.c:1533 [inline]
 SyS_mmap_pgoff+0x462/0x5f0 mm/mmap.c:1491
 SYSC_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
 SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:91
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4406f9
RSP: 002b:00007fffbe095358 EFLAGS: 00000212 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 6873612f7665642f RCX: 00000000004406f9
RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000020447000
RBP: 00000000006cb018 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000013 R11: 0000000000000212 R12: 0000000000401b80
R13: 0000000000401c10 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..