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* symbols.c (scm_gensym): Fix buffer overrun (try `(gensym

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(make-string 2000 #\!))' in an older version).

	Change strncpy to memcpy to allow embedded NUL characters in
	symbol prefix.
This commit is contained in:
Martin Grabmüller 2001-05-28 18:42:57 +00:00
parent 24ecf16c0c
commit 8d09eb0449
2 changed files with 10 additions and 2 deletions
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8
libguile/ChangeLog
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@ -1,3 +1,11 @@
2001-05-28 Martin Grabmueller <mgrabmue@cs.tu-berlin.de>
* symbols.c (scm_gensym): Fix buffer overrun (try `(gensym
(make-string 2000 #\!))' in an older version).
Change strncpy to memcpy to allow embedded NUL characters in
symbol prefix.
2001-05-28 Michael Livshin <mlivshin@bigfoot.com>
* hooks.c (scm_create_hook): deprecated.

4
libguile/symbols.c
View file

@ -247,8 +247,8 @@ SCM_DEFINE (scm_gensym, "gensym", 0, 1, 0,
SCM_VALIDATE_STRING (1, prefix);
len = SCM_STRING_LENGTH (prefix);
if (len > MAX_PREFIX_LENGTH)
name = SCM_MUST_MALLOC (MAX_PREFIX_LENGTH + SCM_INTBUFLEN);
strncpy (name, SCM_STRING_CHARS (prefix), len);
name = SCM_MUST_MALLOC (len + SCM_INTBUFLEN);
memcpy (name, SCM_STRING_CHARS (prefix), len);
}
{
int n_digits = scm_iint2str (gensym_counter++, 10, &name[len]);