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| author | Gabriel Krisman Bertazi <krisman@suse.de> | 2023-08-11 21:38:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-05 23:14:17 +0300 |
| commit | d08534ebc3470b8075924431afc514386daab599 (patch) | |
| tree | c76088e38ef19287a197d1e8ff3596d4403a69a1 /fs | |
| parent | 8c944f8a4139e9448dd10083fa0c6d5211378db8 (diff) | |
| download | linux-d08534ebc3470b8075924431afc514386daab599.tar.xz | |
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: Gabriel Krisman Bertazi <krisman@suse.de>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -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 5ab4b87888a7..795e9fe2f721 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, |