From: Derrick Stolee Date: Wed, 8 Sep 2021 01:42:27 +0000 (+0000) Subject: unpack-trees: fix nested sparse-dir search X-Git-Tag: v2.34.0-rc0~145^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=72d84ea347249c525712987b85ab16fdbb5e38c1;p=thirdparty%2Fgit.git unpack-trees: fix nested sparse-dir search The iterated search in find_cache_entry() was recently modified to include a loop that searches backwards for a sparse directory entry that matches the given traverse_info and name_entry. However, the string comparison failed to actually concatenate those two strings, so this failed to find a sparse directory when it was not a top-level directory. This caused some errors in rare cases where a 'git checkout' spanned a diff that modified files within the sparse directory entry, but we could not correctly find the entry. Helped-by: Johannes Schindelin Helped-by: René Scharfe Signed-off-by: Derrick Stolee Reviewed-by: Elijah Newren Signed-off-by: Junio C Hamano --- diff --git a/unpack-trees.c b/unpack-trees.c index 5786645f31..b78d7ee6c0 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -1255,7 +1255,7 @@ static int sparse_dir_matches_path(const struct cache_entry *ce, static struct cache_entry *find_cache_entry(struct traverse_info *info, const struct name_entry *p) { - struct cache_entry *ce; + const char *path; int pos = find_cache_pos(info, p->path, p->pathlen); struct unpack_trees_options *o = info->data; @@ -1281,9 +1281,11 @@ static struct cache_entry *find_cache_entry(struct traverse_info *info, * paths (e.g. "subdir-"). */ while (pos >= 0) { - ce = o->src_index->cache[pos]; + struct cache_entry *ce = o->src_index->cache[pos]; - if (strncmp(ce->name, p->path, p->pathlen)) + if (!skip_prefix(ce->name, info->traverse_path, &path) || + strncmp(path, p->path, p->pathlen) || + path[p->pathlen] != '/') return NULL; if (S_ISSPARSEDIR(ce->ce_mode) &&