ubifs: Fix directory size calculation for symlinks

commit 00ee8b60102862f4daf0814d12a2ea2744fc0b9b upstream.

We have to account the name of the symlink and not the target length.

Fixes: ca7f85be8d6c ("ubifs: Add support for encrypted symlinks")
Cc: <stable@vger.kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 9da224d4f2da1d7de9f2bf292e7afa504a9668f3..e8616040bffc6278fcf65b0bb91ce752b2f02c1f 100644 (file)
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -1123,8 +1123,7 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
        struct ubifs_inode *ui;
        struct ubifs_inode *dir_ui = ubifs_inode(dir);
        struct ubifs_info *c = dir->i_sb->s_fs_info;
-       int err, len = strlen(symname);
-       int sz_change = CALC_DENT_SIZE(len);
+       int err, sz_change, len = strlen(symname);
        struct fscrypt_str disk_link;
        struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
                                        .new_ino_d = ALIGN(len, 8),
@@ -1151,6 +1150,8 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
        if (err)
                goto out_budg;
 
+       sz_change = CALC_DENT_SIZE(fname_len(&nm));
+
        inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
        if (IS_ERR(inode)) {
                err = PTR_ERR(inode);