CHeck names in verdef auxiliary data exist.

diff --git a/src/elflint.c b/src/elflint.c
index df6e7bb778b5cdce4ae6a12276a5de8aea46ac72..aee3e71d94c33afd836d9a46ffdfa4d7cbf2494b 100644 (file)
--- a/src/elflint.c
+++ b/src/elflint.c
@@ -2412,10 +2412,18 @@ section [%2d] '%s': entry %d has duplicate version name '%s'\n"),
          if (aux == NULL)
            goto no_data;
 
-         newname = alloca (sizeof (*newname));
-         newname->name = elf_strptr (ebl->elf, shdr->sh_link, aux->vda_name);
-         newname->next = refnamelist;
-         refnamelist = newname;
+         name = elf_strptr (ebl->elf, shdr->sh_link, aux->vda_name);
+         if (name == NULL)
+           ERROR (gettext ("\
+section [%2d] '%s': entry %d has invalid name reference in auxiliary data\n"),
+                  idx, section_name (ebl, idx), cnt);
+         else
+           {
+             newname = alloca (sizeof (*newname));
+             newname->name = name;
+             newname->next = refnamelist;
+             refnamelist = newname;
+           }
 
          if ((aux->vda_next != 0 || cnt2 + 1 < def->vd_cnt)
              && aux->vda_next < gelf_fsize (ebl->elf, ELF_T_VDAUX, 1,