glibc/elf/tst-dlopen-auditdup.c
Florian Weimer 43db5e2c06 elf: Signal RT_CONSISTENT after relocation processing in dlopen (bug 31986)
Previously, a la_activity audit event was generated before
relocation processing completed.  This does did not match what
happened during initial startup in elf/rtld.c (towards the end
of dl_main).  It also caused various problems if an auditor
tried to open the same shared object again using dlmopen:
If it was the directly loaded object, it had a search scope
associated with it, so the early exit in dl_open_worker_begin
was taken even though the object was unrelocated.  This caused
the r_state == RT_CONSISTENT assert to fail.  Avoidance of the
assert also depends on reversing the order of r_state update
and auditor event (already implemented in a previous commit).

At the later point, args->map can be NULL due to failure,
so use the assigned namespace ID instead if that is available.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2024-10-25 16:54:22 +02:00

37 lines
1.3 KiB
C

/* Test that recursive dlopen from auditor works (bug 31986).
Copyright (C) 2024 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
<https://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <support/check.h>
#include <support/xdlfcn.h>
static int
do_test (void)
{
puts ("info: about to dlopen tst-dlopen-auditdupmod.so");
fflush (stdout);
void *handle = xdlopen ("tst-dlopen-auditdupmod.so", RTLD_NOW);
int *status = xdlsym (handle, "auditdupmod_status");
printf ("info: auditdupmod_status == %d (from main)\n", *status);
TEST_COMPARE (*status, 2);
xdlclose (handle);
return 0;
}
#include <support/test-driver.c>