mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 21:23:52 +08:00
4bed549a22
* debug/getgroups_chk.c (__getgroups_chk): Return EINVAL error for negative sizees. * posix/bits/unistd.h (getgroups): Call __getgroups_chk for negative __size.
37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
/* Copyright (C) 2005, 2008 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
|
|
|
|
int
|
|
__getgroups_chk (int size, __gid_t list[], size_t listlen)
|
|
{
|
|
if (__builtin_expect (size < 0, 0))
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
if (__builtin_expect (size * sizeof (__gid_t) > listlen, 0))
|
|
__chk_fail ();
|
|
|
|
return __getgroups (size, list);
|
|
}
|