diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/overlayfs/namei.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index 881caa385a36..7f27ec5999ea 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -9,6 +9,7 @@ #include <linux/fs.h> #include <linux/cred.h> +#include <linux/ctype.h> #include <linux/namei.h> #include <linux/xattr.h> #include <linux/ratelimit.h> @@ -467,6 +468,12 @@ static struct dentry *ovl_index_upper(struct ovl_fs *ofs, struct dentry *index) return upper; } +/* Is this a leftover from create/whiteout of directory index entry? */ +static bool ovl_is_temp_index(struct dentry *index) +{ + return index->d_name.name[0] == '#'; +} + /* * Verify that an index entry name matches the origin file handle stored in * OVL_XATTR_ORIGIN and that origin file handle can be decoded to lower path. @@ -484,6 +491,11 @@ int ovl_verify_index(struct ovl_fs *ofs, struct dentry *index) if (!d_inode(index)) return 0; + /* Cleanup leftover from index create/cleanup attempt */ + err = -ESTALE; + if (ovl_is_temp_index(index)) + goto fail; + err = -EINVAL; if (index->d_name.len < sizeof(struct ovl_fh)*2) goto fail; |
