More fixes for corrupt binaries crashing the binutils.

	PR binutils/17512
	* elf.c (bfd_section_from_shdr): Allocate and free the recursion
	detection table on a per-bfd basis.
	* peXXigen.c (pe_print_edata): Handle binaries with a truncated
	export table.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 0a4d0b10bbb70b431a52f31621b47b1acef1e480..d8e99993cdadd3b93b8a16f57d383aa4e78606c0 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,11 @@
+2014-10-28  Nick Clifton  <nickc@redhat.com>
+
+       PR binutils/17512
+       * elf.c (bfd_section_from_shdr): Allocate and free the recursion
+       detection table on a per-bfd basis.
+       * peXXigen.c (pe_print_edata): Handle binaries with a truncated
+       export table.
+
 2014-10-28  Andreas Schwab  <schwab@suse.de>
            Nick Clifton  <nickc@redhat.com>
 

diff --git a/bfd/elf.c b/bfd/elf.c
index 949221f96fb4d3d5114ad78f9bac52fdcf737315..b5fc84b81f1a543fd44edf3015fa7ea849f05c63 100644 (file)
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -1580,6 +1580,7 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
   const char *name;
   bfd_boolean ret = TRUE;
   static bfd_boolean * sections_being_created = NULL;
+  static bfd * sections_being_created_abfd = NULL;
   static unsigned int nesting = 0;
 
   if (shindex >= elf_numsections (abfd))
@@ -1592,13 +1593,19 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
         loop.  Detect this here, by refusing to load a section that we are
         already in the process of loading.  We only trigger this test if
         we have nested at least three sections deep as normal ELF binaries
-        can expect to recurse at least once.  */
-      
+        can expect to recurse at least once.
+
+        FIXME: It would be better if this array was attached to the bfd,
+        rather than being held in a static pointer.  */
+
+      if (sections_being_created_abfd != abfd)
+       sections_being_created = NULL;
       if (sections_being_created == NULL)
        {
          /* FIXME: It would be more efficient to attach this array to the bfd somehow.  */
          sections_being_created = (bfd_boolean *)
            bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
+         sections_being_created_abfd = abfd;
        }
       if (sections_being_created [shindex])
        {
@@ -2102,7 +2109,10 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
   if (sections_being_created)
     sections_being_created [shindex] = FALSE;
   if (-- nesting == 0)
-    sections_being_created = NULL;
+    {
+      sections_being_created = NULL;
+      sections_being_created_abfd = abfd;
+    }
   return ret;
 }
 

diff --git a/bfd/peXXigen.c b/bfd/peXXigen.c
index 61290852ab13d25401fc0126ff40b3cc24e86a88..1a5cb3135d59dee12999997169ca507989c05da6 100644 (file)
--- a/bfd/peXXigen.c
+++ b/bfd/peXXigen.c
@@ -1611,6 +1611,15 @@ pe_print_edata (bfd * abfd, void * vfile)
        }
     }
 
+  /* PR 17512: Handle corrupt PE binaries.  */
+  if (datasize < 36)
+    {
+      fprintf (file,
+              _("\nThere is an export table in %s, but it is too small (%d)\n"),
+              section->name, (int) datasize);
+      return TRUE;
+    }
+
   fprintf (file, _("\nThere is an export table in %s at 0x%lx\n"),
           section->name, (unsigned long) addr);