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To: glibc-bugs@sources.redhat.com
Subject: [Bug dynamic-link/14370] SIGFPE in 'ldd -r'
Date: Sun, 02 Sep 2012 22:57:00 -0000
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http://sourceware.org/bugzilla/show_bug.cgi?id=14370

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> 2012-09-02 22:57:15 UTC ---
We can add check like:

diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 33847f0..e09b413 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -388,6 +388,11 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel
*reloc,
           {
 # ifndef RTLD_BOOTSTRAP
 #  ifndef SHARED
+        if (__builtin_expect (ELFW(ST_TYPE) (sym->st_info) != STT_NOTYPE,
+                      1)
+            && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) != STT_TLS,
+                     1))
+          goto non_tls;
         CHECK_STATIC_TLS (map, sym_map);
 #  else
         if (!TRY_STATIC_TLS (map, sym_map))
@@ -418,6 +423,11 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel
*reloc,
          block we subtract the offset from that of the TLS block.  */
       if (sym != NULL)
         {
+          if (__builtin_expect (ELFW(ST_TYPE) (sym->st_info) != STT_NOTYPE,
+                    1)
+          && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) != STT_TLS,
+                       1))
+        goto non_tls;
           CHECK_STATIC_TLS (map, sym_map);
           *reloc_addr += sym_map->l_tls_offset - sym->st_value;
         }
@@ -433,6 +443,11 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel
*reloc,
          thread pointer.  */
       if (sym != NULL)
         {
+          if (__builtin_expect (ELFW(ST_TYPE) (sym->st_info) != STT_NOTYPE,
+                    1)
+          && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) != STT_TLS,
+                    1))
+        goto non_tls;
           CHECK_STATIC_TLS (map, sym_map);
           *reloc_addr += sym->st_value - sym_map->l_tls_offset;
         }
@@ -476,6 +491,20 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel
*reloc,
       break;
 # endif    /* !RTLD_BOOTSTRAP */
     }
+
+# ifndef RTLD_BOOTSTRAP
+      return;
+
+non_tls:
+    {
+      const char *strtab;
+      strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]);
+      _dl_error_printf ("\
+                reloc type 0x%x against non-TLS symbol `%s' in %s\n",
+                r_type, strtab + refsym->st_name,
+                rtld_progname ?: "<program name unknown>");
+    }
+# endif
     }
 }

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