4.13-stable review patch. If anyone has any objections, please let me know.
------------------ From: Amir Goldstein <[email protected]> commit 7937a56fdf0b064c2ffa33025210f725a4ebc822 upstream. Treat ENOENT from index entry lookup the same way as treating a returned negative dentry. Apparently, either could be returned if file is not found, depending on the underlying file system. Fixes: 359f392ca53e ("ovl: lookup index entry for copy up origin") Signed-off-by: Amir Goldstein <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/overlayfs/namei.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -507,6 +507,10 @@ static struct dentry *ovl_lookup_index(s index = lookup_one_len_unlocked(name.name, ofs->indexdir, name.len); if (IS_ERR(index)) { err = PTR_ERR(index); + if (err == -ENOENT) { + index = NULL; + goto out; + } pr_warn_ratelimited("overlayfs: failed inode index lookup (ino=%lu, key=%*s, err=%i);\n" "overlayfs: mount with '-o index=off' to disable inodes index.\n", d_inode(origin)->i_ino, name.len, name.name,
