* bfdwin.c (bfd_get_file_window): Fix memory leak.

2 files changed, 29 insertions, 16 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 523fe17..d3c38e7 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,7 @@
+2011-09-08  Bernd Jendrissek  <bernd.jendrissek@gmail.com>
+
+	* bfdwin.c (bfd_get_file_window): Fix memory leak.
+
 2011-09-07  Alan Modra  <amodra@gmail.com>
 
 	PR ld/13131
diff --git a/bfd/bfdwin.c b/bfd/bfdwin.c
index 63ad5ed..4103e9c 100644
--- a/bfd/bfdwin.c
+++ b/bfd/bfdwin.c
@@ -1,5 +1,5 @@
 /* Support for memory-mapped windows into a BFD.
-   Copyright 1995, 1996, 2001, 2002, 2003, 2005, 2007, 2008, 2009
+   Copyright 1995, 1996, 2001, 2002, 2003, 2005, 2007, 2008, 2009, 2011
    Free Software Foundation, Inc.
    Written by Cygnus Support.
 
@@ -128,17 +128,16 @@ bfd_get_file_window (bfd *abfd,
   if (pagesize == 0)
     abort ();
 
-  if (i == 0)
+  if (i == NULL)
     {
       i = bfd_zmalloc (sizeof (bfd_window_internal));
-      windowp->i = i;
-      if (i == 0)
+      if (i == NULL)
 	return FALSE;
-      i->data = 0;
+      i->data = NULL;
     }
 #ifdef HAVE_MMAP
   if (ok_to_map
-      && (i->data == 0 || i->mapped == 1)
+      && (i->data == NULL || i->mapped == 1)
       && (abfd->flags & BFD_IN_MEMORY) == 0)
     {
       file_ptr file_offset, offset2;
@@ -156,9 +155,9 @@ bfd_get_file_window (bfd *abfd,
       if (abfd->iostream == NULL
 	  && (abfd->iovec == NULL
 	      || abfd->iovec->bseek (abfd, offset, SEEK_SET) != 0))
-	return FALSE;
-      fd = fileno ((FILE *) abfd->iostream);
+	goto free_and_fail;
 
+      fd = fileno ((FILE *) abfd->iostream);
       /* Compute offsets and size for mmap and for the user's data.  */
       offset2 = offset % pagesize;
       if (offset2 < 0)
@@ -169,10 +168,10 @@ bfd_get_file_window (bfd *abfd,
       real_size -= real_size % pagesize;
 
       /* If we're re-using a memory region, make sure it's big enough.  */
-      if (i->data && i->size < size)
+      if (i->data != NULL && i->size < size)
 	{
 	  munmap (i->data, i->size);
-	  i->data = 0;
+	  i->data = NULL;
 	}
       i->data = mmap (i->data, real_size,
 		      writable ? PROT_WRITE | PROT_READ : PROT_READ,
@@ -185,11 +184,10 @@ bfd_get_file_window (bfd *abfd,
 	  /* An error happened.  Report it, or try using malloc, or
 	     something.  */
 	  bfd_set_error (bfd_error_system_call);
-	  i->data = 0;
 	  windowp->data = 0;
 	  if (debug_windows)
 	    fprintf (stderr, "\t\tmmap failed!\n");
-	  return FALSE;
+	  goto free_and_fail;
 	}
       if (debug_windows)
 	fprintf (stderr, "\n\tmapped %ld at %p, offset is %ld\n",
@@ -198,6 +196,8 @@ bfd_get_file_window (bfd *abfd,
       windowp->data = (bfd_byte *) i->data + offset2;
       windowp->size = size;
       i->mapped = 1;
+      i->refcount = 1;
+      windowp->i = i;
       return TRUE;
     }
   else if (debug_windows)
@@ -228,15 +228,18 @@ bfd_get_file_window (bfd *abfd,
   if (i->data == NULL)
     {
       if (size_to_alloc == 0)
-	return TRUE;
-      return FALSE;
+	{
+	  windowp->i = i;
+	  return TRUE;
+	}
+      goto free_and_fail;
     }
   i->refcount = 1;
   if (bfd_seek (abfd, offset, SEEK_SET) != 0)
-    return FALSE;
+    goto free_and_fail;
   i->size = bfd_bread (i->data, size, abfd);
   if (i->size != size)
-    return FALSE;
+    goto free_and_fail;
   i->mapped = 0;
 #ifdef HAVE_MPROTECT
   if (!writable)
@@ -249,7 +252,13 @@ bfd_get_file_window (bfd *abfd,
 #endif
   windowp->data = i->data;
   windowp->size = i->size;
+  windowp->i = i;
   return TRUE;
+
+ free_and_fail:
+  /* We have a bfd_window_internal, but an error occurred.  Free it. */
+  free (i);
+  return FALSE;
 }
 
 #endif /* USE_MMAP */