------------[ cut here ]------------
memory commitment underflow
WARNING: CPU: 0 PID: 13395 at mm/util.c:640 __vm_enough_memory+0x738/0x960 mm/util.c:638
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 13395 Comm: syz-executor7 Not tainted 4.16.0+ #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 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:991
RIP: 0010:__vm_enough_memory+0x738/0x960 mm/util.c:638
RSP: 0018:ffff8801a9f07750 EFLAGS: 00010286
RAX: 000000000000001b RBX: 1ffff100353e0eee RCX: ffffffff815f5b3d
RDX: 0000000000000000 RSI: ffffffff815fa7f1 RDI: 0000000000000001
RBP: ffff8801a9f07938 R08: ffff8801b5896480 R09: 0000000000000006
R10: ffff8801b5896480 R11: 0000000000000000 R12: ffff8801a9f07910
R13: 0000000000000c68 R14: ffffffff88c07a40 R15: 0000000000000021
 security_vm_enough_memory_mm+0x9d/0xc0 security/security.c:333
 mmap_region+0x37b/0x1820 mm/mmap.c:1673
 do_mmap+0xc79/0x11d0 mm/mmap.c:1494
 do_mmap_pgoff include/linux/mm.h:2237 [inline]
 vm_mmap_pgoff+0x1fb/0x2a0 mm/util.c:357
 ksys_mmap_pgoff+0x26e/0x640 mm/mmap.c:1544
 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+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45536a
RSP: 002b:0000000000a3e778 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045536a
RDX: 0000000000000003 RSI: 0000000000021000 RDI: 0000000000000000
RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000020022 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000021000 R14: 0000000000020022 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..