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Issue #655 - Fix unsafe use of output buffer as input param

This commit is contained in:
Geoff McLane 2017-12-16 21:10:04 +01:00
parent f0438bd4b8
commit 629843401d
1 changed files with 11 additions and 2 deletions
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13
src/messageobj.c
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@ -158,8 +158,17 @@ static TidyMessageImpl *tidyMessageCreateInitV( TidyDocImpl *doc,
if ( ( cfgBool(doc, TidyMuteShow) == yes ) && level <= TidyFatal )
{
TY_(tmbsnprintf)(result->messageOutputDefault, sizeMessageBuf, "%s (%s)", result->messageOutputDefault, TY_(tidyErrorCodeAsKey)(code) );
TY_(tmbsnprintf)(result->messageOutput, sizeMessageBuf, "%s (%s)", result->messageOutput, TY_(tidyErrorCodeAsKey)(code) );
/*\ Issue #655 - Unsafe to use output buffer as one of the va_list
* input parameters in some snprintf implmentations.
\*/
ctmbstr pc = TY_(tidyErrorCodeAsKey)(code);
i = TY_(tmbstrlen)(result->messageOutputDefault);
if (i < sizeMessageBuf)
TY_(tmbsnprintf)(result->messageOutputDefault + i, sizeMessageBuf - i, " (%s)", pc );
i = TY_(tmbstrlen)(result->messageOutput);
if (i < sizeMessageBuf)
TY_(tmbsnprintf)(result->messageOutput + i, sizeMessageBuf - i, " (%s)", pc );
i = 0;
}
result->allowMessage = yes;