Re: [Patch] BaseTools: Add parameter check for the AsciiStringToUint64

["Gao, Liming" <liming.gao@intel.com>]

Bob:
  This function is used to convert string to UINT64. So, the string len should not be too long. I think UINT8 max value 255 is enough for its usage.

Thanks
Liming
> -----Original Message-----
> From: Feng, Bob C
> Sent: Friday, February 22, 2019 6:05 PM
> To: edk2-devel@lists.01.org
> Cc: Feng, Bob C <bob.c.feng@intel.com>; Gao, Liming <liming.gao@intel.com>
> Subject: [Patch] BaseTools: Add parameter check for the AsciiStringToUint64
> 
> If the input parameter AsciiString length is greater
> than 255, the GenFv will hang.
> 
> This patch is to fix this issue.
> 
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Bob Feng <bob.c.feng@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> ---
>  BaseTools/Source/C/Common/ParseInf.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/BaseTools/Source/C/Common/ParseInf.c b/BaseTools/Source/C/Common/ParseInf.c
> index 3907f44331..b29f4c2f93 100644
> --- a/BaseTools/Source/C/Common/ParseInf.c
> +++ b/BaseTools/Source/C/Common/ParseInf.c
> @@ -493,11 +493,11 @@ Returns:
>    EFI_SUCCESS   Number successfully converted.
>    EFI_ABORTED   Invalid character encountered.
> 
>  --*/
>  {
> -  UINT8   Index;
> +  UINT32   Index;
>    UINT64  Value;
>    CHAR8   CurrentChar;
> 
>    //
>    // Initialize the result
> @@ -506,11 +506,11 @@ Returns:
>    Index = 0;
> 
>    //
>    // Check input parameter
>    //
> -  if (AsciiString == NULL || ReturnValue == NULL) {
> +  if (AsciiString == NULL || ReturnValue == NULL || strlen(AsciiString) > 0xFFFFFFFF) {
>      return EFI_INVALID_PARAMETER;
>    }
>    while (AsciiString[Index] == ' ') {
>      Index ++;
>    }
> --
> 2.20.1.windows.1