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Commit ec107554 authored by Gabriel Krisman Bertazi's avatar Gabriel Krisman Bertazi Committed by Greg Kroah-Hartman
Browse files

ecryptfs: Reject casefold directory inodes 



[ Upstream commit cd72c7ef5fed44272272a105b1da22810c91be69 ]

Even though it seems to be able to resolve some names of
case-insensitive directories, the lack of d_hash and d_compare means we
end up with a broken state in the d_cache.  Considering it was never a
goal to support these two together, and we are preparing to use
d_revalidate in case-insensitive filesystems, which would make the
combination even more broken, reject any attempt to get a casefolded
inode from ecryptfs.

Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@suse.de>
Reviewed-by: default avatarEric Biggers <ebiggers@google.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 7a96d85b

fs/ecryptfs/inode.c

+8 −0
Original line number Diff line number Diff line
@@ -76,6 +76,14 @@ static struct inode *__ecryptfs_get_inode(struct inode *lower_inode, 


	if (lower_inode->i_sb != ecryptfs_superblock_to_lower(sb))

		return ERR_PTR(-EXDEV);



	/* Reject dealing with casefold directories. */

	if (IS_CASEFOLDED(lower_inode)) {

		pr_err_ratelimited("%s: Can't handle casefolded directory.\n",

				   __func__);

		return ERR_PTR(-EREMOTE);

	}



	if (!igrab(lower_inode))

		return ERR_PTR(-ESTALE);

	inode = iget5_locked(sb, (unsigned long)lower_inode,