------------[ cut here ]------------
WARNING: CPU: 1 PID: 3891 at mm/util.c:546 __vm_enough_memory+0x37f/0x470 mm/util.c:544
memory commitment underflow[  176.757652] Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3891 Comm: syz-executor6 Not tainted 4.9.98-gf5a861c #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a059f9a8 ffffffff81eb0fc9 ffffffff83c484a0 00000000ffffffff
 0000000000000000 0000000000000001 0000000000000222 ffff8801a059fa68
 ffffffff8141f975 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f7b6
Call Trace:
 [<ffffffff81eb0fc9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb0fc9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8141f975>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff8141fc61>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff811344b2>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff8149609f>] __vm_enough_memory+0x37f/0x470 mm/util.c:544
 [<ffffffff81ceae06>] security_vm_enough_memory_mm+0x96/0xb0 security/security.c:238
 [<ffffffff8112fae7>] dup_mmap kernel/fork.c:609 [inline]
 [<ffffffff8112fae7>] dup_mm kernel/fork.c:1150 [inline]
 [<ffffffff8112fae7>] copy_mm kernel/fork.c:1204 [inline]
 [<ffffffff8112fae7>] copy_process.part.51+0x3ec7/0x6330 kernel/fork.c:1670
 [<ffffffff811323d0>] copy_process kernel/fork.c:1497 [inline]
 [<ffffffff811323d0>] _do_fork+0x1b0/0xdc0 kernel/fork.c:1955
 [<ffffffff811330b7>] SYSC_clone kernel/fork.c:2065 [inline]
 [<ffffffff811330b7>] SyS_clone+0x37/0x50 kernel/fork.c:2059
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f4653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..