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glibc/SOURCES/glibc-rh1817513-48.patch

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commit 8f7a75d700af809eeb4363895078fabfb3a9d7c3
Author: Florian Weimer <fweimer@redhat.com>
Date: Mon Feb 17 16:49:40 2020 +0100
elf: Implement DT_AUDIT, DT_DEPAUDIT support [BZ #24943]
binutils ld has supported --audit, --depaudit for a long time,
only support in glibc has been missing.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Conflicts:
elf/Makefile
(Test backport differences.)
diff --git a/elf/Makefile b/elf/Makefile
index 5b0aeccb0a53c182..a6601ba84c8f4017 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -195,7 +195,8 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
tst-sonamemove-link tst-sonamemove-dlopen \
tst-auditmany tst-initfinilazyfail \
tst-dlopenfail tst-dlopenfail-2 \
- tst-filterobj tst-filterobj-dlopen tst-auxobj tst-auxobj-dlopen
+ tst-filterobj tst-filterobj-dlopen tst-auxobj tst-auxobj-dlopen \
+ tst-audit14 tst-audit15 tst-audit16
# reldep9
tests-internal += loadtest unload unload2 circleload1 \
neededtest neededtest2 neededtest3 neededtest4 \
@@ -310,7 +311,8 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
tst-initlazyfailmod tst-finilazyfailmod \
tst-dlopenfailmod1 tst-dlopenfaillinkmod tst-dlopenfailmod2 \
tst-dlopenfailmod3 \
- tst-filterobj-flt tst-filterobj-aux tst-filterobj-filtee
+ tst-filterobj-flt tst-filterobj-aux tst-filterobj-filtee \
+ tst-auditlogmod-1 tst-auditlogmod-2 tst-auditlogmod-3
# Most modules build with _ISOMAC defined, but those filtered out
# depend on internal headers.
@@ -1453,6 +1455,22 @@ $(objpfx)tst-auditmany.out: $(objpfx)tst-auditmanymod1.so \
tst-auditmany-ENV = \
LD_AUDIT=tst-auditmanymod1.so:tst-auditmanymod2.so:tst-auditmanymod3.so:tst-auditmanymod4.so:tst-auditmanymod5.so:tst-auditmanymod6.so:tst-auditmanymod7.so:tst-auditmanymod8.so:tst-auditmanymod9.so
+LDFLAGS-tst-audit14 = -Wl,--audit=tst-auditlogmod-1.so
+$(objpfx)tst-auditlogmod-1.so: $(libsupport)
+$(objpfx)tst-audit14.out: $(objpfx)tst-auditlogmod-1.so
+LDFLAGS-tst-audit15 = \
+ -Wl,--audit=tst-auditlogmod-1.so,--depaudit=tst-auditlogmod-2.so
+$(objpfx)tst-auditlogmod-2.so: $(libsupport)
+$(objpfx)tst-audit15.out: \
+ $(objpfx)tst-auditlogmod-1.so $(objpfx)tst-auditlogmod-2.so
+LDFLAGS-tst-audit16 = \
+ -Wl,--audit=tst-auditlogmod-1.so:tst-auditlogmod-2.so \
+ -Wl,--depaudit=tst-auditlogmod-3.so
+$(objpfx)tst-auditlogmod-3.so: $(libsupport)
+$(objpfx)tst-audit16.out: \
+ $(objpfx)tst-auditlogmod-1.so $(objpfx)tst-auditlogmod-2.so \
+ $(objpfx)tst-auditlogmod-3.so
+
# tst-sonamemove links against an older implementation of the library.
LDFLAGS-tst-sonamemove-linkmod1.so = \
-Wl,--version-script=tst-sonamemove-linkmod1.map \
diff --git a/elf/rtld.c b/elf/rtld.c
index c39cb8f2cd4bb1cc..d44facf5343b3301 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -151,9 +151,17 @@ static void audit_list_init (struct audit_list *);
not be called after audit_list_next. */
static void audit_list_add_string (struct audit_list *, const char *);
+/* Add the audit strings from the link map, found in the dynamic
+ segment at TG (either DT_AUDIT and DT_DEPAUDIT). Must be called
+ before audit_list_next. */
+static void audit_list_add_dynamic_tag (struct audit_list *,
+ struct link_map *,
+ unsigned int tag);
+
/* Extract the next audit module from the audit list. Only modules
for which dso_name_valid_for_suid is true are returned. Must be
- called after all the audit_list_add_string calls. */
+ called after all the audit_list_add_string,
+ audit_list_add_dynamic_tags calls. */
static const char *audit_list_next (struct audit_list *);
/* This is a list of all the modes the dynamic loader can be in. */
@@ -233,6 +241,16 @@ audit_list_add_string (struct audit_list *list, const char *string)
list->current_tail = string;
}
+static void
+audit_list_add_dynamic_tag (struct audit_list *list, struct link_map *main_map,
+ unsigned int tag)
+{
+ ElfW(Dyn) *info = main_map->l_info[ADDRIDX (tag)];
+ const char *strtab = (const char *) D_PTR (main_map, l_info[DT_STRTAB]);
+ if (info != NULL)
+ audit_list_add_string (list, strtab + info->d_un.d_val);
+}
+
static const char *
audit_list_next (struct audit_list *list)
{
@@ -1630,6 +1648,9 @@ ERROR: '%s': cannot process note segment.\n", _dl_argv[0]);
/* Assign a module ID. Do this before loading any audit modules. */
GL(dl_rtld_map).l_tls_modid = _dl_next_tls_modid ();
+ audit_list_add_dynamic_tag (&audit_list, main_map, DT_AUDIT);
+ audit_list_add_dynamic_tag (&audit_list, main_map, DT_DEPAUDIT);
+
/* If we have auditing DSOs to load, do it now. */
bool need_security_init = true;
if (audit_list.length > 0)
diff --git a/elf/tst-audit14.c b/elf/tst-audit14.c
new file mode 100644
index 0000000000000000..27ff8db9480a98cc
--- /dev/null
+++ b/elf/tst-audit14.c
@@ -0,0 +1,46 @@
+/* Main program with DT_AUDIT. One audit module.
+ Copyright (C) 2020 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 <stdlib.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/xstdio.h>
+
+static int
+do_test (void)
+{
+ /* Verify what the audit module has written. This test assumes that
+ standard output has been redirected to a regular file. */
+ FILE *fp = xfopen ("/dev/stdout", "r");
+
+ char *buffer = NULL;
+ size_t buffer_length = 0;
+ size_t line_length = xgetline (&buffer, &buffer_length, fp);
+ const char *message = "info: tst-auditlogmod-1.so loaded\n";
+ TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+ /* No more audit module output. */
+ line_length = xgetline (&buffer, &buffer_length, fp);
+ TEST_COMPARE_BLOB ("", 0, buffer, line_length);
+
+ free (buffer);
+ xfclose (fp);
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/elf/tst-audit15.c b/elf/tst-audit15.c
new file mode 100644
index 0000000000000000..cbd1589ec40653d1
--- /dev/null
+++ b/elf/tst-audit15.c
@@ -0,0 +1,50 @@
+/* Main program with DT_AUDIT and DT_DEPAUDIT. Two audit modules.
+ Copyright (C) 2020 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 <stdlib.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/xstdio.h>
+
+static int
+do_test (void)
+{
+ /* Verify what the audit modules have written. This test assumes
+ that standard output has been redirected to a regular file. */
+ FILE *fp = xfopen ("/dev/stdout", "r");
+
+ char *buffer = NULL;
+ size_t buffer_length = 0;
+ size_t line_length = xgetline (&buffer, &buffer_length, fp);
+ const char *message = "info: tst-auditlogmod-1.so loaded\n";
+ TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+ line_length = xgetline (&buffer, &buffer_length, fp);
+ message = "info: tst-auditlogmod-2.so loaded\n";
+ TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+ /* No more audit module output. */
+ line_length = xgetline (&buffer, &buffer_length, fp);
+ TEST_COMPARE_BLOB ("", 0, buffer, line_length);
+
+ free (buffer);
+ xfclose (fp);
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/elf/tst-audit16.c b/elf/tst-audit16.c
new file mode 100644
index 0000000000000000..dd6ce189ea6fffa3
--- /dev/null
+++ b/elf/tst-audit16.c
@@ -0,0 +1,54 @@
+/* Main program with DT_AUDIT and DT_DEPAUDIT. Three audit modules.
+ Copyright (C) 2020 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 <stdlib.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/xstdio.h>
+
+static int
+do_test (void)
+{
+ /* Verify what the audit modules have written. This test assumes
+ that standard output has been redirected to a regular file. */
+ FILE *fp = xfopen ("/dev/stdout", "r");
+
+ char *buffer = NULL;
+ size_t buffer_length = 0;
+ size_t line_length = xgetline (&buffer, &buffer_length, fp);
+ const char *message = "info: tst-auditlogmod-1.so loaded\n";
+ TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+ line_length = xgetline (&buffer, &buffer_length, fp);
+ message = "info: tst-auditlogmod-2.so loaded\n";
+ TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+ line_length = xgetline (&buffer, &buffer_length, fp);
+ message = "info: tst-auditlogmod-3.so loaded\n";
+ TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+ /* No more audit module output. */
+ line_length = xgetline (&buffer, &buffer_length, fp);
+ TEST_COMPARE_BLOB ("", 0, buffer, line_length);
+
+ free (buffer);
+ xfclose (fp);
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/elf/tst-auditlogmod-1.c b/elf/tst-auditlogmod-1.c
new file mode 100644
index 0000000000000000..db9dac4c01a58dcd
--- /dev/null
+++ b/elf/tst-auditlogmod-1.c
@@ -0,0 +1,27 @@
+/* Audit module which logs that it was loaded. Variant 1.
+ Copyright (C) 2020 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 <link.h>
+#include <support/support.h>
+
+unsigned int
+la_version (unsigned int v)
+{
+ write_message ("info: tst-auditlogmod-1.so loaded\n");
+ return LAV_CURRENT;
+}
diff --git a/elf/tst-auditlogmod-2.c b/elf/tst-auditlogmod-2.c
new file mode 100644
index 0000000000000000..871c22641c47fed0
--- /dev/null
+++ b/elf/tst-auditlogmod-2.c
@@ -0,0 +1,27 @@
+/* Audit module which logs that it was loaded. Variant 2.
+ Copyright (C) 2020 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 <link.h>
+#include <support/support.h>
+
+unsigned int
+la_version (unsigned int v)
+{
+ write_message ("info: tst-auditlogmod-2.so loaded\n");
+ return LAV_CURRENT;
+}
diff --git a/elf/tst-auditlogmod-3.c b/elf/tst-auditlogmod-3.c
new file mode 100644
index 0000000000000000..da2ee19d4ab9e861
--- /dev/null
+++ b/elf/tst-auditlogmod-3.c
@@ -0,0 +1,27 @@
+/* Audit module which logs that it was loaded. Variant 3.
+ Copyright (C) 2020 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 <link.h>
+#include <support/support.h>
+
+unsigned int
+la_version (unsigned int v)
+{
+ write_message ("info: tst-auditlogmod-3.so loaded\n");
+ return LAV_CURRENT;
+}
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