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view lwar/lwar.h @ 342:12e2453f8417
Fix potential memory access after free in lw_expr_simplify_go()
Thanks to Erik Gavriluk (erik@bombfactory.com) for spotting a missing "else"
when attempting to resolve a "special" reference. This could have led to
access to memory that had already been freed if a "special" resolved to an
expression that also referenced the same special (a circular reference).
Whether that can actually happen is questionable but the check must have
been added for a reason so it follows that it should be done correctly.
This also brings the code in line with similar code resolving symbol
references which makes a similar check.
author | William Astle <lost@l-w.ca> |
---|---|
date | Sat, 14 Mar 2015 14:06:13 -0600 |
parents | 2c24602be78f |
children | 45df37e81741 |
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/* lwar.h Copyright © 2009 William Astle This file is part of LWAR. LWAR is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. Contains the main defs used by the linker */ #define LWAR_OP_LIST 1 #define LWAR_OP_ADD 2 #define LWAR_OP_REMOVE 3 #define LWAR_OP_CREATE 4 #define LWAR_OP_EXTRACT 5 #define LWAR_OP_REPLACE 6 #ifndef __lwar_h_seen__ #define __lwar_h_seen__ #ifndef __lwar_c_seen__ extern char *archive_file; extern int debug_level; extern int operation; extern int nfiles; extern char **files; extern int mergeflag; //typedef void * ARHANDLE; #define AR_MODE_RD 1 #define AR_MODE_WR 2 #define AR_MODE_RW 3 #define AR_MODE_CREATE 4 #define __lwar_E__ extern #else #define __lwar_E__ #endif // __lwar_c_seen__ __lwar_E__ void add_file_name(char *fn); //__lwar_E__ ARHANDLE open_archive(char *fn, int mode); #undef __lwar_E__ #endif //__lwar_h_seen__