glibc/SOURCES/glibc-rh1410154-15.patch

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2021-04-23 04:11:25 +00:00
commit 5177d85b0c050a2333a0c4165c938dd422013d05
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Thu Jan 16 06:45:36 2020 -0800
Clear GL(dl_initfirst) when freeing its link_map memory [BZ# 25396]
We should clear GL(dl_initfirst) when freeing its link_map memory.
Tested on Fedora 31/x86-64 with CET.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
diff --git a/elf/dl-close.c b/elf/dl-close.c
index fa7f3e8174576e46..a9ecdff62dba88fb 100644
--- a/elf/dl-close.c
+++ b/elf/dl-close.c
@@ -749,6 +749,10 @@ _dl_close_worker (struct link_map *map, bool force)
if (imap->l_runpath_dirs.dirs != (void *) -1)
free (imap->l_runpath_dirs.dirs);
+ /* Clear GL(dl_initfirst) when freeing its link_map memory. */
+ if (imap == GL(dl_initfirst))
+ GL(dl_initfirst) = NULL;
+
free (imap);
}
}