From f63b73814f74032c0e5d0a83300e3d864ef905e5 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Wed, 13 Nov 2019 15:44:56 +0100 Subject: Remove all loaded objects if dlopen fails, ignoring NODELETE [BZ #20839] MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This introduces a “pending NODELETE” state in the link map, which is flipped to the persistent NODELETE state late in dlopen, via activate_nodelete. During initial relocation, symbol binding records pending NODELETE state only. dlclose ignores pending NODELETE state. Taken together, this results that a partially completed dlopen is rolled back completely because new NODELETE mappings are unloaded. Tested on x86_64-linux-gnu and i386-linux-gnu. Change-Id: Ib2a3d86af6f92d75baca65431d74783ee0dbc292 --- elf/tst-dlopenfailmod2.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 elf/tst-dlopenfailmod2.c (limited to 'elf/tst-dlopenfailmod2.c') diff --git a/elf/tst-dlopenfailmod2.c b/elf/tst-dlopenfailmod2.c new file mode 100644 index 0000000000..7d600386c1 --- /dev/null +++ b/elf/tst-dlopenfailmod2.c @@ -0,0 +1,29 @@ +/* Module which depends on on a NODELETE module, and can be loaded. + Copyright (C) 2019 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, see + . */ + +#include +#include + +/* Force linking against libpthread. */ +void *pthread_create_reference = pthread_create; + +static void __attribute__ ((constructor)) +init (void) +{ + puts ("info: tst-dlopenfailmod2.so constructor invoked"); +} -- cgit 1.4.1