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From fe4a28ccbfd33cae9e1f56b174d46b4eb2329efd Mon Sep 17 00:00:00 2001
From: Dandan Bi <dandan.bi@intel.com>
Date: Sat, 1 Apr 2017 10:31:14 +0800
Subject: [PATCH] MdeModulePkg/UefiHiiLib:Fix incorrect comparison expression
Fix the incorrect comparison between pointer and constant zero character.
https://bugzilla.tianocore.org/show_bug.cgi?id=416
V2: The pointer StringPtr points to a string returned
by ExtractConfig/ExportConfig, if it is NULL, function
InternalHiiIfrValueAction will return FALSE. So in
current usage model, the StringPtr can not be NULL before
using it, so we can add ASSERT here.
Cc: Eric Dong <eric.dong@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
---
MdeModulePkg/Library/UefiHiiLib/HiiLib.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/MdeModulePkg/Library/UefiHiiLib/HiiLib.c b/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
index a2abf26980b..cd0cd35a0f3 100644
--- a/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
+++ b/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
@@ -2201,8 +2201,9 @@ InternalHiiIfrValueAction (
}
StringPtr = ConfigAltResp;
-
- while (StringPtr != L'\0') {
+ ASSERT (StringPtr != NULL);
+
+ while (*StringPtr != L'\0') {
//
// 1. Find <ConfigHdr> GUID=...&NAME=...&PATH=...
//
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