diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | generic/tkTextBTree.c | 12 |
2 files changed, 12 insertions, 5 deletions
@@ -1,3 +1,8 @@ +2011-03-28 Jan Nijtmans <nijtmans@users.sf.net> + + * generic/tkTextBTree.c: [Bug 3129527]: Fix buffer overflow w/ GCC 4.5 and + -D_FORTIFY_SOURCE=2. One more place where this problem could appear. + 2011-03-24 Jan Nijtmans <nijtmans@users.sf.net> * win/tkWinMenu.c: [Bug #3239768] tk8.4.19 (and later) WIN32 diff --git a/generic/tkTextBTree.c b/generic/tkTextBTree.c index b714546..e464cc6 100644 --- a/generic/tkTextBTree.c +++ b/generic/tkTextBTree.c @@ -1076,7 +1076,7 @@ TkBTreeInsertChars( curPtr->nextPtr = segPtr; } segPtr->size = chunkSize; - strncpy(segPtr->body.chars, string, (size_t) chunkSize); + memcpy(segPtr->body.chars, string, (size_t) chunkSize); segPtr->body.chars[chunkSize] = 0; if (eol[-1] != '\n') { @@ -4550,12 +4550,13 @@ CharSplitProc( newPtr1->typePtr = &tkTextCharType; newPtr1->nextPtr = newPtr2; newPtr1->size = index; - strncpy(newPtr1->body.chars, segPtr->body.chars, (size_t) index); + memcpy(newPtr1->body.chars, segPtr->body.chars, (size_t) index); newPtr1->body.chars[index] = 0; newPtr2->typePtr = &tkTextCharType; newPtr2->nextPtr = segPtr->nextPtr; newPtr2->size = segPtr->size - index; - strcpy(newPtr2->body.chars, segPtr->body.chars + index); + memcpy(newPtr2->body.chars, segPtr->body.chars + index, newPtr2->size); + newPtr2->body.chars[newPtr2->size] = 0; ckfree((char *) segPtr); return newPtr1; } @@ -4596,8 +4597,9 @@ CharCleanupProc( newPtr->typePtr = &tkTextCharType; newPtr->nextPtr = segPtr2->nextPtr; newPtr->size = segPtr->size + segPtr2->size; - strcpy(newPtr->body.chars, segPtr->body.chars); - strcpy(newPtr->body.chars + segPtr->size, segPtr2->body.chars); + memcpy(newPtr->body.chars, segPtr->body.chars, segPtr->size); + memcpy(newPtr->body.chars + segPtr->size, segPtr2->body.chars, segPtr2->size); + newPtr->body.chars[newPtr->size] = 0; ckfree((char *) segPtr); ckfree((char *) segPtr2); return newPtr; |