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| author | Hao Wu <hao.a.wu@intel.com> | 2017-05-23 09:47:26 +0800 |
|---|---|---|
| committer | Hao Wu <hao.a.wu@intel.com> | 2017-05-24 13:17:51 +0800 |
| commit | d727614c913449a59e8333c4d75cff4ebf1f9779 (patch) | |
| tree | f45a699d21e8ce4b4e077f9baa61e89e52989d5a /ShellPkg | |
| parent | 2d499388452cf8215265a0757395e7dbcdb32ea8 (diff) | |
| download | edk2-d727614c913449a59e8333c4d75cff4ebf1f9779.tar.gz edk2-d727614c913449a59e8333c4d75cff4ebf1f9779.tar.bz2 edk2-d727614c913449a59e8333c4d75cff4ebf1f9779.zip | |
ShellPkg/UefiShellLib: Avoid reading undefined content before string
https://bugzilla.tianocore.org/show_bug.cgi?id=566
In function InternalShellPrintWorker(), if the string in variable
'mPostReplaceFormat2' starts with character L'%', the following
expression:
*(ResumeLocation-1) == L'^' at line 2831
will read an undefined value before the starting of string
'mPostReplaceFormat2'.
This commit adds additional logic to avoid reading undefined content.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
Diffstat (limited to 'ShellPkg')
| -rw-r--r-- | ShellPkg/Library/UefiShellLib/UefiShellLib.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c index 55e8a67ac4..25706e9bc3 100644 --- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c +++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c @@ -2828,7 +2828,7 @@ InternalShellPrintWorker( // update the attribute
//
if (ResumeLocation != NULL) {
- if (*(ResumeLocation-1) == L'^') {
+ if ((ResumeLocation != mPostReplaceFormat2) && (*(ResumeLocation-1) == L'^')) {
//
// Move cursor back 1 position to overwrite the ^
//
|