From 1e6937643577e1fb5ea8696c2f583e20bcd29279 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 3 Sep 2011 20:19:51 -0400 Subject: [PATCH] fix some length calculations in memory streams --- src/stdio/open_memstream.c | 2 +- src/stdio/open_wmemstream.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/src/stdio/open_memstream.c b/src/stdio/open_memstream.c index dedc3d51..2f3569f1 100644 --- a/src/stdio/open_memstream.c +++ b/src/stdio/open_memstream.c @@ -41,7 +41,7 @@ static size_t ms_write(FILE *f, const unsigned char *buf, size_t len) f->wpos = f->wbase; if (ms_write(f, f->wbase, len2) < len2) return 0; } - if (len > c->space - c->pos) { + if (len >= c->space - c->pos) { len2 = 2*c->space+1 | c->space+len+1; newbuf = realloc(c->buf, len2); if (!newbuf) return 0; diff --git a/src/stdio/open_wmemstream.c b/src/stdio/open_wmemstream.c index 5402ca1a..3bc0f254 100644 --- a/src/stdio/open_wmemstream.c +++ b/src/stdio/open_wmemstream.c @@ -39,13 +39,13 @@ static size_t wms_write(FILE *f, const unsigned char *buf, size_t len) struct cookie *c = f->cookie; size_t len2; wchar_t *newbuf; - if (len > c->space - c->pos) { + if (len >= c->space - c->pos) { len2 = 2*c->space+1 | c->space+len+1; if (len2 > SSIZE_MAX/4) return 0; newbuf = realloc(c->buf, len2*4); if (!newbuf) return 0; *c->bufp = c->buf = newbuf; - memset(c->buf + c->space, 0, len2 - c->space); + memset(c->buf + c->space, 0, 4*(len2 - c->space)); c->space = len2; } -- 2.25.1