[edk2-devel] [PATCH v2 1/2] MdeModulePkg/Bus/Ata/AtaAtapiPassThru: Fix SIGN_EXTENSION Coverity issue

[Wu, Hao A]

Reviewed-by: Hao A Wu <hao.a.wu at intel.com>

Best Regards,
Hao Wu

> -----Original Message-----
> From: Ranbir Singh <rsingh at ventanamicro.com>
> Sent: Friday, June 9, 2023 8:33 PM
> To: devel at edk2.groups.io; rsingh at ventanamicro.com
> Cc: Wu, Hao A <hao.a.wu at intel.com>; Ni, Ray <ray.ni at intel.com>
> Subject: [PATCH v2 1/2] MdeModulePkg/Bus/Ata/AtaAtapiPassThru: Fix
> SIGN_EXTENSION Coverity issue
> 
> From: Ranbir Singh <Ranbir.Singh3 at Dell.com>
> 
> Line number 1348 does contain a typecast with UINT32, but it is after
> all the operations (16-bit left shift followed by OR'ing) are over.
> To avoid any SIGN_EXTENSION, typecast the intermediate result after
> 16-bit left shift operation immediately with UINT32.
> 
> Cc: Hao A Wu <hao.a.wu at intel.com>
> Cc: Ray Ni <ray.ni at intel.com>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4204
> Signed-off-by: Ranbir Singh <Ranbir.Singh3 at Dell.com>
> Signed-off-by: Ranbir Singh <rsingh at ventanamicro.com>
> ---
> 
> Notes:
>     Retain outer cast
> 
>  MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
> b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
> index 50406fe0270d..f39c909d0631 100644
> --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
> +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
> @@ -1345,7 +1345,7 @@ AtaPassThruPassThru (
>      // Check logical block size
> 
>      //
> 
>      if ((IdentifyData->AtaData.phy_logic_sector_support & BIT12) != 0) {
> 
> -      BlockSize = (UINT32)(((IdentifyData->AtaData.logic_sector_size_hi << 16)
> | IdentifyData->AtaData.logic_sector_size_lo) * sizeof (UINT16));
> 
> +      BlockSize = (UINT32)(((UINT32)(IdentifyData-
> >AtaData.logic_sector_size_hi << 16) | IdentifyData-
> >AtaData.logic_sector_size_lo) * sizeof (UINT16));
> 
>      }
> 
>    }
> 
> 
> 
> --
> 2.34.1



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