From a0f33f996f7986dbf37631a4577f8565b42df29e Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 8 Sep 2011 19:48:47 -0400 Subject: Add range checking for FD_SET, FD_CLR, and FD_ISSET --- debug/fdelt_chk.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 debug/fdelt_chk.c (limited to 'debug/fdelt_chk.c') diff --git a/debug/fdelt_chk.c b/debug/fdelt_chk.c new file mode 100644 index 0000000..7d9e4b9 --- /dev/null +++ b/debug/fdelt_chk.c @@ -0,0 +1,30 @@ +/* Copyright (C) 2011 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 + + +unsigned long int +__fdelt_chk (unsigned long int d) +{ + if (d >= FD_SETSIZE) + __chk_fail (); + + return d / __NFDBITS; +} +strong_alias (__fdelt_chk, __fdelt_warn) -- cgit v1.1