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protect buffer size from overflow.

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This commit is contained in:
christos 2007-02-03 00:23:01 +00:00
parent 12287894d6
commit cca9be70a3
1 changed files with 7 additions and 3 deletions
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10
lib/libc/stdio/vsnprintf_ss.c
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@ -1,4 +1,4 @@
/* $NetBSD: vsnprintf_ss.c,v 1.3 2007/02/02 23:00:28 christos Exp $ */
/* $NetBSD: vsnprintf_ss.c,v 1.4 2007/02/03 00:23:01 christos Exp $ */
/*-
* Copyright (c) 1990, 1993
@ -37,7 +37,7 @@
#if 0
static char sccsid[] = "@(#)vsnprintf.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: vsnprintf_ss.c,v 1.3 2007/02/02 23:00:28 christos Exp $");
__RCSID("$NetBSD: vsnprintf_ss.c,v 1.4 2007/02/03 00:23:01 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
@ -140,10 +140,14 @@ vsnprintf_ss(char *sbuf, size_t slen, const char *fmt0, _BSD_VA_LIST_ ap)
static const char xdigs_lower[16] = "0123456789abcdef";
static const char xdigs_upper[16] = "0123456789ABCDEF";
_DIAGASSERT(n == 0 || sbuf != NULL);
_DIAGASSERT(fmt != NULL);
if ((int)n < 0) {
errno = EINVAL;
return (-1);
}
tailp = sbuf + slen;
cp = NULL; /* XXX: shutup gcc */