------------[ cut here ]------------
WARNING: CPU: 0 PID: 3738 at mm/util.c:546 __vm_enough_memory+0x38b/0x470 mm/util.c:544
memory commitment underflow[   44.354616] Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3738 Comm: syz-executor3 Not tainted 4.9.88-g71df7bb #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801b5a8f998 ffffffff81d95f19 ffffffff83a482a0 ffff8801b5a8fa70
 ffffffff83aad000 ffffffff8149959b 0000000000000009 ffff8801b5a8fa60
 ffffffff8142fa71 0000000041b58ab3 ffffffff8418bc48 ffffffff8142f8b5
Call Trace:
 [<ffffffff81d95f19>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95f19>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142fa71>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff811317b4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff81131894>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff8149959b>] __vm_enough_memory+0x38b/0x470 mm/util.c:544
 [<ffffffff81bd1720>] security_vm_enough_memory_mm+0x90/0xb0 security/security.c:238
 [<ffffffff8112bb80>] dup_mmap kernel/fork.c:609 [inline]
 [<ffffffff8112bb80>] dup_mm kernel/fork.c:1150 [inline]
 [<ffffffff8112bb80>] copy_mm kernel/fork.c:1204 [inline]
 [<ffffffff8112bb80>] copy_process.part.50+0x2630/0x5cc0 kernel/fork.c:1670
 [<ffffffff8112f6a0>] copy_process kernel/fork.c:1497 [inline]
 [<ffffffff8112f6a0>] _do_fork+0x1c0/0xd70 kernel/fork.c:1955
 [<ffffffff81130327>] SYSC_clone kernel/fork.c:2065 [inline]
 [<ffffffff81130327>] SyS_clone+0x37/0x50 kernel/fork.c:2059
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b7a53>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..