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Code Issues Releases Wiki Activity

Added bounds check

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This commit is contained in:
Bryan Roe
2020-10-29 14:45:14 -07:00
parent d529c5ec7c
commit cc975fdfae
1 changed files with 6 additions and 3 deletions
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7
microstack/ILibParsers.c
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@@ -8965,7 +8965,7 @@ char *ILibString_ToLower(const char *inString, size_t length)
int ILibReadFileFromDiskEx(char **Target, char *FileName) int ILibReadFileFromDiskEx(char **Target, char *FileName)
{ {
char *buffer; char *buffer;
int SourceFileLength; int SourceFileLength = 0;
FILE *SourceFile = NULL; FILE *SourceFile = NULL;
#ifdef WIN32 #ifdef WIN32
@@ -8976,12 +8976,15 @@ int ILibReadFileFromDiskEx(char **Target, char *FileName)
if (SourceFile == NULL) { *Target = NULL; return 0; } if (SourceFile == NULL) { *Target = NULL; return 0; }
fseek(SourceFile, 0, SEEK_END); fseek(SourceFile, 0, SEEK_END);
SourceFileLength = (int)ftell(SourceFile); if (ftell(SourceFile) < INT32_MAX) { SourceFileLength = (int)ftell(SourceFile); }
if (SourceFileLength >= 0) if (SourceFileLength >= 0)
{ {
fseek(SourceFile, 0, SEEK_SET); fseek(SourceFile, 0, SEEK_SET);
if ((buffer = (char*)malloc(SourceFileLength + 1)) == NULL) ILIBCRITICALEXIT(254); if ((buffer = (char*)malloc(SourceFileLength + 1)) == NULL) ILIBCRITICALEXIT(254);
if (SourceFileLength > 0)
{
SourceFileLength = (int)fread(buffer, sizeof(char), (size_t)SourceFileLength, SourceFile); SourceFileLength = (int)fread(buffer, sizeof(char), (size_t)SourceFileLength, SourceFile);
}
buffer[SourceFileLength] = 0; // To be nice, we allocated one more byte and put a zero at the end. buffer[SourceFileLength] = 0; // To be nice, we allocated one more byte and put a zero at the end.
fclose(SourceFile); fclose(SourceFile);