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* [PATCH] MdePkg/BaseLib: Add an additional check within AsciiStriCmp
@ 2018-08-03  3:40 Ruiyu Ni
  2018-08-03  5:08 ` Wu, Hao A
  0 siblings, 1 reply; 2+ messages in thread
From: Ruiyu Ni @ 2018-08-03  3:40 UTC (permalink / raw)
  To: edk2-devel; +Cc: Hao A Wu

This commit adds an addtional check in AsciiStriCmp. It
explicitly checks the end of the sting pointed by 'SecondString' to make
the code logic easier for reading and to prevent possible mis-reports by
static code checkers.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
---
 MdePkg/Library/BaseLib/String.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdePkg/Library/BaseLib/String.c b/MdePkg/Library/BaseLib/String.c
index e7fe513aec..cb90774c86 100644
--- a/MdePkg/Library/BaseLib/String.c
+++ b/MdePkg/Library/BaseLib/String.c
@@ -1262,7 +1262,7 @@ AsciiStriCmp (
 
   UpperFirstString  = InternalBaseLibAsciiToUpper (*FirstString);
   UpperSecondString = InternalBaseLibAsciiToUpper (*SecondString);
-  while ((*FirstString != '\0') && (UpperFirstString == UpperSecondString)) {
+  while ((*FirstString != '\0') && (*SecondString != '\0') && (UpperFirstString == UpperSecondString)) {
     FirstString++;
     SecondString++;
     UpperFirstString  = InternalBaseLibAsciiToUpper (*FirstString);
-- 
2.16.1.windows.1



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2018-08-03  3:40 [PATCH] MdePkg/BaseLib: Add an additional check within AsciiStriCmp Ruiyu Ni
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