------------[ cut here ]------------
memory commitment underflow
WARNING: CPU: 0 PID: 8172 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: 8172 Comm: syz-executor6 Not tainted 4.16.0-rc3+ #338
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+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+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:__vm_enough_memory+0x5a6/0x810 mm/util.c:626
RSP: 0018:ffff8801d2257000 EFLAGS: 00010282
RAX: dffffc0000000008 RBX: 1ffff1003a44ae05 RCX: ffffffff815aab7e
RDX: 0000000000000000 RSI: 1ffff1003a44adb0 RDI: 1ffff1003a44ad85
RBP: ffff8801d22571b0 R08: 1ffff1003a44ad47 R09: 0000000000000000
R10: ffff8801c1979948 R11: 0000000000000000 R12: ffff8801d2257188
R13: ffffffff86fba0a0 R14: 0000000000000013 R15: dffffc0000000000
 security_vm_enough_memory_mm+0x90/0xb0 security/security.c:327
 dup_mmap kernel/fork.c:447 [inline]
 dup_mm kernel/fork.c:1233 [inline]
 copy_mm+0x8b9/0x131f kernel/fork.c:1287
 copy_process.part.38+0x1f56/0x4b60 kernel/fork.c:1793
 copy_process kernel/fork.c:1606 [inline]
 _do_fork+0x1f7/0xf70 kernel/fork.c:2087
 SYSC_clone kernel/fork.c:2194 [inline]
 SyS_clone+0x37/0x50 kernel/fork.c:2188
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45245a
RSP: 002b:0000000000a3eb00 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000a3eb00 RCX: 000000000045245a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000a3eb40 R08: 0000000000000001 R09: 0000000001b36940
R10: 0000000001b36c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..