Re: [PATCH v2 0/2] Fix error in PrintLib

["Kinney, Michael D" <michael.d.kinney@intel.com>]

Jian,

This change breaks GCC5 builds.

/home/mdkinney/tianocore/edk2/MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c: In function 'InternalPrintLibSPrintMarker':
/home/mdkinney/tianocore/edk2/MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c:2054:71: error: suggest parentheses around '&&' within '||' [-Werror=parentheses]
             ArgumentString[Count * BytesPerArgumentCharacter] != '\0' &&
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
             Count < Precision || ((Flags & PRECISION) == 0);
             ~~~~~~~~~~~~~~~~~

Mike

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-
> bounces@lists.01.org] On Behalf Of Jian J Wang
> Sent: Wednesday, December 27, 2017 6:38 PM
> To: edk2-devel@lists.01.org
> Subject: [edk2] [PATCH v2 0/2] Fix error in PrintLib
> 
> > v2:
> >    a. Correct incorrect description in commit log
> >    b. Fix another similar issue in the same function
> >    c. Fix similar issues in
> MdeModulePkg/DxePrintLibPrint2Protocol
> 
> Due to a potential hole in the stop condition of the
> loop, the two continuous
> access to ArgumentString (index, index+1) inside the
> loop might cause the
> string ending character ('\0') and the byte after it to
> be read.
> 
> Jian J Wang (2):
>   MdePkg/BasePrintLib: Fix error in Precision position
> calculation
>   MdeModulePkg/DxePrintLibPrint2Protocol: Fix potential
> string over read
> 
> 
> MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib
> .c | 7 +++++--
>  MdePkg/Library/BasePrintLib/PrintLibInternal.c
> | 7 +++++--
>  2 files changed, 10 insertions(+), 4 deletions(-)
> 
> --
> 2.15.1.windows.2
> 
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