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After d1d5471579 ("Remove dead
DL_DST_REQ_STATIC code.") we always setup the link map l to make the
static and shared cases the same. The bug is that in elf/dl-load.c
(_dl_init_paths) we conditionally set l only in the #ifdef SHARED
case, but unconditionally use it later. The simple solution is to
remove the #ifdef SHARED conditional, because it's no longer needed,
and unconditionally setup l for both the static and shared cases. A
regression test is added to run a static binary with
LD_LIBRARY_PATH='$ORIGIN' which crashes before the fix and runs after
the fix.
Co-Authored-By: Florian Weimer <fweimer@redhat.com>
33 lines
1.3 KiB
C
33 lines
1.3 KiB
C
/* Test DST expansion for static binaries doesn't carsh. Bug 23462.
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* The purpose of this test is to exercise the code in elf/dl-loac.c
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(_dl_init_paths) or thereabout and ensure that static binaries
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don't crash when expanding DSTs.
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If the dynamic loader code linked into the static binary cannot
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handle expanding the DSTs e.g. null-deref on an incomplete link
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map, then it will crash before reaching main, so the test harness
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is unnecessary. */
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int
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main (void)
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{
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return 0;
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}
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