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WARNING: CPU: 1 PID: 16523 at mm/util.c:546 __vm_enough_memory+0x38b/0x470 mm/util.c:544
memory commitment underflow
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 16523 Comm: syz-executor5 Not tainted 4.9.86-g00db063 #52
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d38479d8 ffffffff81d956f9 ffffffff83a480c0 ffff8801d3847ab0
 ffffffff83aacf00 ffffffff8149905b 0000000000000009 ffff8801d3847aa0
 ffffffff8142f531 0000000041b58ab3 ffffffff8418b470 ffffffff8142f375
Call Trace:
 [<ffffffff81d956f9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d956f9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142f531>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff811311c4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff811312a4>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff8149905b>] __vm_enough_memory+0x38b/0x470 mm/util.c:544
 [<ffffffff81bd0f00>] security_vm_enough_memory_mm+0x90/0xb0 security/security.c:238
 [<ffffffff814e74fb>] mmap_region+0x93b/0xfd0 mm/mmap.c:1644
 [<ffffffff814e810b>] do_mmap+0x57b/0xbe0 mm/mmap.c:1473
 [<ffffffff8149892b>] do_mmap_pgoff include/linux/mm.h:2032 [inline]
 [<ffffffff8149892b>] vm_mmap_pgoff+0x16b/0x1b0 mm/util.c:329
 [<ffffffff814e21a0>] SYSC_mmap_pgoff mm/mmap.c:1523 [inline]
 [<ffffffff814e21a0>] SyS_mmap_pgoff+0xd0/0x560 mm/mmap.c:1481
 [<ffffffff8105f2f6>] SYSC_mmap arch/x86/kernel/sys_x86_64.c:95 [inline]
 [<ffffffff8105f2f6>] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:86
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b5613>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..