[ldv-project] [PATCH] ecryptfs: remove unneeded buggy code in ecryptfs_do_create()

Fri Oct 10 02:26:12 MSK 2014

Hi Alexey - thanks for the patch.
On 2014年09月23日 00:39:31, Alexey Khoroshilov wrote:
> There is a bug in error handling of lock_parent() in ecryptfs_do_create():
> lock_parent() acquries mutex even if dget_parent() fails, so mutex should be unlocked anyway.
>> But dget_parent() does not fail, so the patch just removes unneeded buggy code.
>> Found by Linux Driver Verification project (linuxtesting.org).
>> Signed-off-by: Alexey Khoroshilov <khoroshilov at ispras.ru>

This looks good to me and I've included it in the pull request that I
just sent to Linus. Thanks!
Tyler
> ---
> fs/ecryptfs/inode.c | 7 -------
> 1 file changed, 7 deletions(-)
>> diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
> index d4a9431ec73c..97735c75085f 100644
> --- a/fs/ecryptfs/inode.c
> +++ b/fs/ecryptfs/inode.c
> @@ -192,12 +192,6 @@ ecryptfs_do_create(struct inode *directory_inode,
>> 	lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
> 	lower_dir_dentry = lock_parent(lower_dentry);
> -	if (IS_ERR(lower_dir_dentry)) {
> -		ecryptfs_printk(KERN_ERR, "Error locking directory of "
> -				"dentry\n");
> -		inode = ERR_CAST(lower_dir_dentry);
> -		goto out;
> -	}
> 	rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, true);
> 	if (rc) {
> 		printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
> @@ -215,7 +209,6 @@ ecryptfs_do_create(struct inode *directory_inode,
> 	fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode);
> out_lock:
> 	unlock_dir(lower_dir_dentry);
> -out:
> 	return inode;
> }
>> -- 
> 1.9.1
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