------------[ cut here ]------------
WARNING: CPU: 0 PID: 25286 at mm/util.c:546 __vm_enough_memory+0x37f/0x470 mm/util.c:544
memory commitment underflow[ 1411.010695] Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 25286 Comm: syz-executor6 Not tainted 4.9.106-g54f1dc0 #47
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801be8379e8 ffffffff81eb4229 ffffffff83c48b40 00000000ffffffff
 0000000000000000 0000000000000000 0000000000000222 ffff8801be837aa8
 ffffffff81421de5 0000000041b58ab3 ffffffff843b9990 ffffffff81421c26
Call Trace:
 [<ffffffff81eb4229>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb4229>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81421de5>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff814220d1>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff81136662>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff8149872f>] __vm_enough_memory+0x37f/0x470 mm/util.c:544
 [<ffffffff81cee076>] security_vm_enough_memory_mm+0x96/0xb0 security/security.c:238
 [<ffffffff814e55d1>] mmap_region+0x5b1/0x1040 mm/mmap.c:1644
 [<ffffffff814e655a>] do_mmap+0x4fa/0xc30 mm/mmap.c:1473
 [<ffffffff81498018>] do_mmap_pgoff include/linux/mm.h:2032 [inline]
 [<ffffffff81498018>] vm_mmap_pgoff+0x168/0x1b0 mm/util.c:329
 [<ffffffff814e05c0>] SYSC_mmap_pgoff mm/mmap.c:1523 [inline]
 [<ffffffff814e05c0>] SyS_mmap_pgoff+0xd0/0x550 mm/mmap.c:1481
 [<ffffffff8105e0f6>] SYSC_mmap arch/x86/kernel/sys_x86_64.c:96 [inline]
 [<ffffffff8105e0f6>] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:87
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9b13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..