update to glibc-2.28-151.el8.src.rpm

Signed-off-by: Liwei Ge <geliwei@openanolis.org>

glibc-rh1882466-2.patch

@@ -0,0 +1,98 @@
+commit 9ffa50b26b0cb5d3043adf6d3d0b1ea735acc147
+Author: Florian Weimer <fweimer@redhat.com>
+Date:   Fri Dec 11 17:30:03 2020 +0100
+
+    elf: Include libc.so.6 as main program in dependency sort (bug 20972)
+    
+    _dl_map_object_deps always sorts the initially loaded object first
+    during dependency sorting.  This means it is relocated last in
+    dl_open_worker.  This results in crashes in IFUNC resolvers without
+    lazy bindings if libraries are preloaded that refer to IFUNCs in
+    libc.so.6: the resolvers are called when libc.so.6 has not been
+    relocated yet, so references to _rtld_global_ro etc. crash.
+    
+    The fix is to check against the libc.so.6 link map recorded by the
+    __libc_early_init framework, and let it participate in the dependency
+    sort.
+    
+    This fixes bug 20972.
+    
+    Reviewed-by: Carlos O'Donell <carlos@redhat.com>
+
+Conflicts:
+	elf/Makefile
+	  (Usual test backport differences.)
+
+diff --git a/elf/Makefile b/elf/Makefile
+index 67029930dd2cb461..fc9c685b9d23bb6c 100644
+--- a/elf/Makefile
++++ b/elf/Makefile
+@@ -215,7 +215,7 @@ tests-internal += loadtest unload unload2 circleload1 \
+ 	 tst-tls3 tst-tls6 tst-tls7 tst-tls8 tst-dlmopen2 \
+ 	 tst-ptrguard1 tst-stackguard1 tst-libc_dlvsym \
+ 	 tst-create_format1 tst-tls-surplus tst-dl-hwcaps_split
+-tests-container += tst-pldd
++tests-container += tst-pldd tst-preload-pthread-libc
+ ifeq ($(build-hardcoded-path-in-tests),yes)
+ tests += tst-dlopen-aout
+ tst-dlopen-aout-no-pie = yes
+diff --git a/elf/dl-deps.c b/elf/dl-deps.c
+index 50f053a1586efdc3..007069f670eced95 100644
+--- a/elf/dl-deps.c
++++ b/elf/dl-deps.c
+@@ -610,7 +610,12 @@ Filters not supported with LD_TRACE_PRELINKING"));
+     memcpy (l_initfini, map->l_searchlist.r_list,
+ 	    nlist * sizeof (struct link_map *));
+ 
+-  _dl_sort_maps (&l_initfini[1], nlist - 1, NULL, false);
++  /* If libc.so.6 is the main map, it participates in the sort, so
++     that the relocation order is correct regarding libc.so.6.  */
++  if (l_initfini[0] == GL (dl_ns)[l_initfini[0]->l_ns].libc_map)
++    _dl_sort_maps (l_initfini, nlist, NULL, false);
++  else
++    _dl_sort_maps (&l_initfini[1], nlist - 1, NULL, false);
+ 
+   /* Terminate the list of dependencies.  */
+   l_initfini[nlist] = NULL;
+diff --git a/elf/tst-preload-pthread-libc.c b/elf/tst-preload-pthread-libc.c
+new file mode 100644
+index 0000000000000000..48cb512a93f3da19
+--- /dev/null
++++ b/elf/tst-preload-pthread-libc.c
+@@ -0,0 +1,36 @@
++/* Test relocation ordering if the main executable is libc.so.6 (bug 20972).
++   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 <gnu/lib-names.h>
++#include <stdio.h>
++#include <support/support.h>
++#include <unistd.h>
++
++int
++main (void)
++{
++  char *libc = xasprintf ("%s/%s", support_slibdir_prefix, LIBC_SO);
++  char *argv[] = { libc, NULL };
++  char *envp[] = { (char *) "LD_PRELOAD=" LIBPTHREAD_SO,
++    /* Relocation ordering matters most without lazy binding.  */
++    (char *) "LD_BIND_NOW=1",
++    NULL };
++  execve (libc, argv, envp);
++  printf ("execve of %s failed: %m\n", libc);
++  return 1;
++}