cifs: Increase size of tmp_buf in cifs_readdir to avoid potential overflows

Increase size of tmp_buf to possible maximum to avoid potential
overflows.

Pointed-out-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 1a8be6228333..ebd0da7ecb3d 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -1074,7 +1074,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
                 with the rare long characters alloc more to account for
                 such multibyte target UTF-8 characters. cifs_unicode.c,
                 which actually does the conversion, has the same limit */
-                tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
+                tmp_buf = kmalloc((4 * NAME_MAX) + 2, GFP_KERNEL);
                 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
                         if (current_entry == NULL) {
                                 /* evaluate whether this case is an error */