Check corrupt input

	PR ld/17713
	* elflink.c (_bfd_elf_gc_mark_rsec): Check corrupt input.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 0ebd6d7..a4af0be 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,8 @@
+2014-12-15  H.J. Lu  <hongjiu.lu@intel.com>
+
+       PR ld/17713
+       * elflink.c (_bfd_elf_gc_mark_rsec): Check corrupt input.
+
 2014-12-13  H.J. Lu  <hongjiu.lu@intel.com>
 
        PR ld/17689

diff --git a/bfd/elflink.c b/bfd/elflink.c
index c964a98..94ab762 100644 (file)
--- a/bfd/elflink.c
+++ b/bfd/elflink.c
@@ -11683,6 +11683,12 @@ _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec,
       || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL)
     {
       h = cookie->sym_hashes[r_symndx - cookie->extsymoff];
+      if (h == NULL)
+       {
+         info->callbacks->einfo (_("%F%P: corrupt input: %B\n"),
+                                 sec->owner);
+         return NULL;
+       }
       while (h->root.type == bfd_link_hash_indirect
             || h->root.type == bfd_link_hash_warning)
        h = (struct elf_link_hash_entry *) h->root.u.i.link;