flat: fix unmap len in load error path

The data chunk is mmaped with 'len' which remains unchanged, so use that
when unmapping in the error path rather than trying to recalculate (and
incorrectly so) the value used originally.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: David McCullough <davidm@snapgear.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index b8656225b34b91fcc40dece1983fc4df5d36a922..b6ab27ccf214fc8c406a9ef70e91d7930af0eaec 100644 (file)
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -596,7 +596,7 @@ static int load_flat_file(struct linux_binprm * bprm,
                if (IS_ERR_VALUE(result)) {
                        printk("Unable to read data+bss, errno %d\n", (int)-result);
                        do_munmap(current->mm, textpos, text_len);
-                       do_munmap(current->mm, realdatastart, data_len + extra);
+                       do_munmap(current->mm, realdatastart, len);
                        ret = result;
                        goto err;
                }