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* string.c (str_make_independent_expand): fix buffer overflow

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while shrinking.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28863 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2010-08-05 03:39:19 +00:00
parent a2ebc53ec4
commit ae82480705
2 changed files with 7 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Thu Aug 5 12:39:14 2010 Nobuyoshi Nakada <nobu@ruby-lang.org>
* string.c (str_make_independent_expand): fix buffer overflow
while shrinking.
Thu Aug 5 06:42:31 2010 Tanaka Akira <akr@fsij.org>
* file.c (realpath_rec): call rb_str_modify before rb_str_set_len.

3
string.c
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@ -1271,8 +1271,9 @@ str_make_independent_expand(VALUE str, long expand)
ptr = ALLOC_N(char, len+expand+1);
if (RSTRING_PTR(str)) {
memcpy(ptr, RSTRING_PTR(str), len);
memcpy(ptr, RSTRING_PTR(str), expand < 0 ? len + expand : len);
}
len += expand;
STR_SET_NOEMBED(str);
ptr[len] = 0;
RSTRING(str)->as.heap.ptr = ptr;