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ntdll: Fix IOCTL_DVD_READ_STRUCTURE expected output size.

This commit is contained in:
Erich E. Hoover 2015-06-14 15:13:40 -06:00 committed by Alexandre Julliard
parent 4e91fa5f6b
commit cdefae9ef2
1 changed files with 23 additions and 1 deletions
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24
dlls/ntdll/cdrom.c
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@ -2491,6 +2491,28 @@ static NTSTATUS DVD_GetRegion(int fd, PDVD_REGION region)
#endif
}
static DWORD DVD_ReadStructureSize(const DVD_READ_STRUCTURE *structure, DWORD size)
{
if (!structure || size != sizeof(DVD_READ_STRUCTURE))
return 0;
switch (structure->Format)
{
case DvdPhysicalDescriptor:
return sizeof(DVD_LAYER_DESCRIPTOR);
case DvdCopyrightDescriptor:
return sizeof(DVD_COPYRIGHT_DESCRIPTOR);
case DvdDiskKeyDescriptor:
return sizeof(DVD_DISK_KEY_DESCRIPTOR);
case DvdBCADescriptor:
return sizeof(DVD_BCA_DESCRIPTOR);
case DvdManufacturerDescriptor:
return sizeof(DVD_MANUFACTURER_DESCRIPTOR);
default:
return 0;
}
}
/******************************************************************
* DVD_ReadStructure
*
@ -3097,7 +3119,7 @@ NTSTATUS CDROM_DeviceIoControl(HANDLE hDevice,
}
break;
case IOCTL_DVD_READ_STRUCTURE:
sz = sizeof(DVD_LAYER_DESCRIPTOR);
sz = DVD_ReadStructureSize(lpInBuffer, nInBufferSize);
if (lpInBuffer == NULL || nInBufferSize != sizeof(DVD_READ_STRUCTURE)) status = STATUS_INVALID_PARAMETER;
else if (nOutBufferSize < sz || !lpOutBuffer) status = STATUS_BUFFER_TOO_SMALL;
else