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| author | Gabriel Krisman Bertazi <krisman@suse.de> | 2023-08-11 14:38:12 -0400 |
|---|---|---|
| committer | Gabriel Krisman Bertazi <krisman@suse.de> | 2024-01-08 16:34:43 -0300 |
| commit | cd72c7ef5fed44272272a105b1da22810c91be69 (patch) | |
| tree | a31e76b07ca7f33ba09b9ffce111bbf8bc2f1001 /fs/ecryptfs/inode.c | |
| parent | b85ea95d086471afb4ad062012a4d73cd328fa86 (diff) | |
| download | linux-stable-cd72c7ef5fed44272272a105b1da22810c91be69.tar.gz linux-stable-cd72c7ef5fed44272272a105b1da22810c91be69.tar.bz2 linux-stable-cd72c7ef5fed44272272a105b1da22810c91be69.zip | |
ecryptfs: Reject casefold directory inodes
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: Gabriel Krisman Bertazi <krisman@suse.de>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/ecryptfs/inode.c')
| -rw-r--r-- | fs/ecryptfs/inode.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index a25dd3d20008..00d8de9a448d 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -78,6 +78,14 @@ 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, |