https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106624
--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Martin Liska <mar...@gcc.gnu.org>: https://gcc.gnu.org/g:193f7e62815b4089dfaed4c2bd34fd4f10209e27 commit r12-9061-g193f7e62815b4089dfaed4c2bd34fd4f10209e27 Author: Sergei Trofimovich <siarh...@google.com> Date: Tue Aug 16 12:35:07 2022 +0100 driver: fix environ corruption after putenv() [PR106624] The bug appeared afte r13-2010-g1270ccda70ca09 "Factor out jobserver_active_p" slightly changed `putenv()` use from allocating to non-allocating: -xputenv (concat ("MAKEFLAGS=", dup, NULL)); +xputenv (jinfo.skipped_makeflags.c_str ()); `xputenv()` (and `putenv()`) don't copy strings and only store the pointer in the `environ` global table. As a result `environ` got corrupted as soon as `jinfo.skipped_makeflags` store got deallocated. This started causing bootstrap crashes in `execv()` calls: xgcc: fatal error: cannot execute '/build/build/./prev-gcc/collect2': execv: Bad address The change restores memory allocation for `xputenv()` argument. gcc/ PR driver/106624 * gcc.cc (driver::detect_jobserver): Allocate storage xputenv() argument using xstrdup(). (cherry picked from commit 2b403297b111c990c331b5bbb6165b061ad2259b)
