From 79fca845f0e420a8dbd1c9712d652a054f8dd5a3 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 11 Jan 2018 23:27:00 -0500 Subject: [PATCH] ubifs: free the encrypted symlink target commit 6b46d444146eb8d0b99562795cea8086639d7282 upstream. ubifs_symlink() forgot to free the kmalloc()'ed buffer holding the encrypted symlink target, creating a memory leak. Fix it. (UBIFS could actually encrypt directly into ui->data, removing the temporary buffer, but that is left for the patch that switches to use the symlink helper functions.) Fixes: ca7f85be8d6c ("ubifs: Add support for encrypted symlinks") Signed-off-by: Eric Biggers Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ubifs/dir.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index 417fe0b29f23..ef820f803176 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -1216,10 +1216,8 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, ostr.len = disk_link.len; err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); - if (err) { - kfree(sd); + if (err) goto out_inode; - } sd->len = cpu_to_le16(ostr.len); disk_link.name = (char *)sd; @@ -1251,11 +1249,10 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, goto out_cancel; mutex_unlock(&dir_ui->ui_mutex); - ubifs_release_budget(c, &req); insert_inode_hash(inode); d_instantiate(dentry, inode); - fscrypt_free_filename(&nm); - return 0; + err = 0; + goto out_fname; out_cancel: dir->i_size -= sz_change; @@ -1268,6 +1265,7 @@ out_fname: fscrypt_free_filename(&nm); out_budg: ubifs_release_budget(c, &req); + kfree(sd); return err; } -- 2.11.4.GIT