------------[ cut here ]------------
WARNING: CPU: 1 PID: 6702 at mm/util.c:522 __vm_enough_memory+0x38b/0x470 mm/util.c:520
memory commitment underflow[   35.453040] Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 6702 Comm: syz-executor0 Not tainted 4.9.76-g8e170a5 #11
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d0edfa30 ffffffff81d93149 ffffffff83a47180 ffff8801d0edfb08
 ffffffff83aabd00 ffffffff81497abb 0000000000000009 ffff8801d0edfaf8
 ffffffff8142e371 0000000041b58ab3 ffffffff84189678 ffffffff8142e1b5
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e371>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff811300f4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff811301d4>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff81497abb>] __vm_enough_memory+0x38b/0x470 mm/util.c:520
 [<ffffffff81bcf100>] security_vm_enough_memory_mm+0x90/0xb0 security/security.c:238
 [<ffffffff814e5fbb>] mmap_region+0x93b/0xfd0 mm/mmap.c:1644
 [<ffffffff814e6bcb>] do_mmap+0x57b/0xbe0 mm/mmap.c:1473
 [<ffffffff8149738b>] do_mmap_pgoff include/linux/mm.h:2019 [inline]
 [<ffffffff8149738b>] vm_mmap_pgoff+0x16b/0x1b0 mm/util.c:305
 [<ffffffff814e0c70>] SYSC_mmap_pgoff mm/mmap.c:1523 [inline]
 [<ffffffff814e0c70>] SyS_mmap_pgoff+0xd0/0x560 mm/mmap.c:1481
 [<ffffffff8105f306>] SYSC_mmap arch/x86/kernel/sys_x86_64.c:95 [inline]
 [<ffffffff8105f306>] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:86
 [<ffffffff838b0aa8>] entry_SYSCALL_64_fastpath+0x23/0xe2
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..