audit: type=1400 audit(1515712404.616:8): avc:  denied  { map } for  pid=3512 comm="syzkaller034859" path="/dev/ashmem" dev="devtmpfs" ino=1178 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: 1 PID: 3512 at mm/util.c:606 __vm_enough_memory+0x5a6/0x810 mm/util.c:604
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3512 Comm: syzkaller034859 Not tainted 4.15.0-rc7-mm1+ #53
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+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 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+0x22/0x40 arch/x86/entry/entry_64.S:1102
RIP: 0010:__vm_enough_memory+0x5a6/0x810 mm/util.c:604
RSP: 0018:ffff8801bf6d78e0 EFLAGS: 00010282
RAX: dffffc0000000008 RBX: 1ffff10037edaf21 RCX: ffffffff815a254e
RDX: 0000000000000000 RSI: 1ffff10037ead53b RDI: 0000000000000293
RBP: ffff8801bf6d7a90 R08: 1ffff10037edaeaf R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801bf6d7a68
R13: ffffffff869b9080 R14: 0000000000000fff R15: dffffc0000000000
 security_vm_enough_memory_mm+0x90/0xb0 security/security.c:327
 mmap_region+0x321/0x15a0 mm/mmap.c:1666
 do_mmap+0x73c/0xf70 mm/mmap.c:1494
 do_mmap_pgoff include/linux/mm.h:2224 [inline]
 vm_mmap_pgoff+0x1de/0x280 mm/util.c:333
 SYSC_mmap_pgoff mm/mmap.c:1544 [inline]
 SyS_mmap_pgoff+0x23b/0x5f0 mm/mmap.c:1502
 SYSC_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
 SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:91
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x444a89
RSP: 002b:00007fff4790c038 EFLAGS: 00000216 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000444a89
RDX: 0000000000000003 RSI: 0000000000fff000 RDI: 0000000020000000
RBP: 7fffffffffffffff R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000032 R11: 0000000000000216 R12: 6873612f7665642f
R13: 0000000000401ff0 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..