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[MOUNTMGR] Fix buffer length checking

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Found by Vadim Galiant.

CORE-15549
This commit is contained in:
Pierre Schweitzer 2019-01-03 23:10:31 +01:00
parent 6d89d19f39
commit d84ab9ec7c
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GPG key ID: 7545556C3D585B0B
1 changed files with 1 additions and 1 deletions
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2
drivers/filters/mountmgr/device.c
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@ -265,7 +265,7 @@ MountMgrCreatePoint(IN PDEVICE_EXTENSION DeviceExtension,
MaxLength = MAX((Point->DeviceNameOffset + Point->DeviceNameLength),
(Point->SymbolicLinkNameLength + Point->SymbolicLinkNameOffset));
if (MaxLength >= Stack->Parameters.DeviceIoControl.InputBufferLength)
if (MaxLength > Stack->Parameters.DeviceIoControl.InputBufferLength)
{
return STATUS_INVALID_PARAMETER;
}