[PATCH] exec: allow > 2GB executables to run on 64-bit systems

[Dave Anderson <anderson@redhat.com>]

When a executable that is greater than 2GB in size is attempted on a 64-bit
system on a file system that calls, or uses generic_file_open() as its
open handler, it fails with an EOVERFLOW erro.  This patch adds a call
to force_o_largefile() call in open_exec(), as done in sys_open() and
sys_openat().

Signed-off-by: anderson@redhat.com
---

--- linux-2.6.24-rc3/fs/exec.c.orig
+++ linux-2.6.24-rc3/fs/exec.c
@@ -658,7 +658,8 @@ struct file *open_exec(const char *name)
 			int err = vfs_permission(&nd, MAY_EXEC);
 			file = ERR_PTR(err);
 			if (!err) {
-				file = nameidata_to_filp(&nd, O_RDONLY);
+				file = nameidata_to_filp(&nd, force_o_largefile() ?
+					O_RDONLY|O_LARGEFILE : O_RDONLY);
 				if (!IS_ERR(file)) {
 					err = deny_write_access(file);
 					if (err) {