diff options
| author |   millert <millert@openbsd.org> | 2017-03-17 16:06:33 +0000 |
|---|---|---|
| committer | millert <millert@openbsd.org> | 2017-03-17 16:06:33 +0000 |
| commit | 4af449f85a4862bfa80c9967859a5d52f49d6a13 (patch) | |
| tree | 046e34356160f77c7ccbec38990b097f83e0a482 /lib/libc/stdio/fvwrite.c | |
| parent | recallocarray() the string buffer, to avoid leaving such contents (diff) | |
| download | wireguard-openbsd-4af449f85a4862bfa80c9967859a5d52f49d6a13.tar.xz wireguard-openbsd-4af449f85a4862bfa80c9967859a5d52f49d6a13.zip | |
Use recallocarray() to avoid leaving detritus in memory when resizing
the string buffer used by asprintf() and vasprintf(). OK deraadt@
Diffstat (limited to 'lib/libc/stdio/fvwrite.c')
| -rw-r--r-- | lib/libc/stdio/fvwrite.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/libc/stdio/fvwrite.c b/lib/libc/stdio/fvwrite.c index d7b2ec69bdc..ba58f9de01d 100644 --- a/lib/libc/stdio/fvwrite.c +++ b/lib/libc/stdio/fvwrite.c @@ -1,4 +1,4 @@ -/* $OpenBSD: fvwrite.c,v 1.19 2017/03/16 14:26:18 millert Exp $ */ +/* $OpenBSD: fvwrite.c,v 1.20 2017/03/17 16:06:33 millert Exp $ */ /*- * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. @@ -112,7 +112,8 @@ __sfvwrite(FILE *fp, struct __suio *uio) /* Round up to nearest page. */ _size = ((blen + len + 1 + pgmsk) & ~pgmsk) - 1; - _base = realloc(fp->_bf._base, _size + 1); + _base = recallocarray(fp->_bf._base, + fp->_bf._size + 1, _size + 1, 1); if (_base == NULL) goto err; fp->_w += _size - fp->_bf._size; |