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f57140990f
It didn't take long for oss-fuzz to find double frees due to a bug in the cleanup logic. It's seen when reading in any alpha-vms object file except when alpha_vms_vec is the default. But alpha_vms_vec is of course the default when building for --target=alpha-dec-vms (and naturally what I used to test the cleanup support since that is the only target with a cleanup that does anything currently). Anyway, the bug is that if bfd_check_format_matches is to preserve a match the cleanup for that match can't be run. Quite obviously that would destroy part of the match state. * format.c (struct bfd_preserve): Add cleanup field. (bfd_preserve_save): Add cleanup param and save. (bfd_preserve_restore): Return cleanup. (bfd_preserve_finish): Call the cleanup for the discarded match. (bfd_check_format_matches): Pass cleanup to bfd_preserve_save, and clear when preserving a match. Restore cleanup too when restoring that match.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.