diff options
Diffstat (limited to 'builtin/submodule--helper.c')
-rw-r--r-- | builtin/submodule--helper.c | 114 |
1 files changed, 99 insertions, 15 deletions
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c index e4e18adb57..e604cb5ddb 100644 --- a/builtin/submodule--helper.c +++ b/builtin/submodule--helper.c @@ -1,4 +1,3 @@ -#define USE_THE_INDEX_VARIABLE #include "builtin.h" #include "abspath.h" #include "environment.h" @@ -207,18 +206,18 @@ static int module_list_compute(const char **argv, if (repo_read_index(the_repository) < 0) die(_("index file corrupt")); - for (i = 0; i < the_index.cache_nr; i++) { - const struct cache_entry *ce = the_index.cache[i]; + for (i = 0; i < the_repository->index->cache_nr; i++) { + const struct cache_entry *ce = the_repository->index->cache[i]; - if (!match_pathspec(&the_index, pathspec, ce->name, ce_namelen(ce), + if (!match_pathspec(the_repository->index, pathspec, ce->name, ce_namelen(ce), 0, ps_matched, 1) || !S_ISGITLINK(ce->ce_mode)) continue; ALLOC_GROW(list->entries, list->nr + 1, list->alloc); list->entries[list->nr++] = ce; - while (i + 1 < the_index.cache_nr && - !strcmp(ce->name, the_index.cache[i + 1]->name)) + while (i + 1 < the_repository->index->cache_nr && + !strcmp(ce->name, the_repository->index->cache[i + 1]->name)) /* * Skip entries with the same name in different stages * to make sure an entry is returned only once. @@ -303,6 +302,9 @@ static void runcommand_in_submodule_cb(const struct cache_entry *list_item, struct child_process cp = CHILD_PROCESS_INIT; char *displaypath; + if (validate_submodule_path(path) < 0) + exit(128); + displaypath = get_submodule_displaypath(path, info->prefix, info->super_prefix); @@ -634,6 +636,9 @@ static void status_submodule(const char *path, const struct object_id *ce_oid, .free_removed_argv_elements = 1, }; + if (validate_submodule_path(path) < 0) + exit(128); + if (!submodule_from_path(the_repository, null_oid(), path)) die(_("no submodule mapping found in .gitmodules for path '%s'"), path); @@ -907,7 +912,7 @@ static void generate_submodule_summary(struct summary_cb *info, int fd = open(p->sm_path, O_RDONLY); if (fd < 0 || fstat(fd, &st) < 0 || - index_fd(&the_index, &p->oid_dst, fd, &st, OBJ_BLOB, + index_fd(the_repository->index, &p->oid_dst, fd, &st, OBJ_BLOB, p->sm_path, 0)) error(_("couldn't hash object from '%s'"), p->sm_path); } else { @@ -1238,6 +1243,9 @@ static void sync_submodule(const char *path, const char *prefix, if (!is_submodule_active(the_repository, path)) return; + if (validate_submodule_path(path) < 0) + exit(128); + sub = submodule_from_path(the_repository, null_oid(), path); if (sub && sub->url) { @@ -1381,6 +1389,9 @@ static void deinit_submodule(const char *path, const char *prefix, struct strbuf sb_config = STRBUF_INIT; char *sub_git_dir = xstrfmt("%s/.git", path); + if (validate_submodule_path(path) < 0) + exit(128); + sub = submodule_from_path(the_repository, null_oid(), path); if (!sub || !sub->name) @@ -1662,16 +1673,42 @@ static char *clone_submodule_sm_gitdir(const char *name) return sm_gitdir; } +static int dir_contains_only_dotgit(const char *path) +{ + DIR *dir = opendir(path); + struct dirent *e; + int ret = 1; + + if (!dir) + return 0; + + e = readdir_skip_dot_and_dotdot(dir); + if (!e) + ret = 0; + else if (strcmp(DEFAULT_GIT_DIR_ENVIRONMENT, e->d_name) || + (e = readdir_skip_dot_and_dotdot(dir))) { + error("unexpected item '%s' in '%s'", e->d_name, path); + ret = 0; + } + + closedir(dir); + return ret; +} + static int clone_submodule(const struct module_clone_data *clone_data, struct string_list *reference) { char *p; char *sm_gitdir = clone_submodule_sm_gitdir(clone_data->name); char *sm_alternate = NULL, *error_strategy = NULL; + struct stat st; struct child_process cp = CHILD_PROCESS_INIT; const char *clone_data_path = clone_data->path; char *to_free = NULL; + if (validate_submodule_path(clone_data_path) < 0) + exit(128); + if (!is_absolute_path(clone_data->path)) clone_data_path = to_free = xstrfmt("%s/%s", get_git_work_tree(), clone_data->path); @@ -1681,6 +1718,10 @@ static int clone_submodule(const struct module_clone_data *clone_data, "git dir"), sm_gitdir); if (!file_exists(sm_gitdir)) { + if (clone_data->require_init && !stat(clone_data_path, &st) && + !is_empty_dir(clone_data_path)) + die(_("directory not empty: '%s'"), clone_data_path); + if (safe_create_leading_directories_const(sm_gitdir) < 0) die(_("could not create directory '%s'"), sm_gitdir); @@ -1725,10 +1766,18 @@ static int clone_submodule(const struct module_clone_data *clone_data, if(run_command(&cp)) die(_("clone of '%s' into submodule path '%s' failed"), clone_data->url, clone_data_path); + + if (clone_data->require_init && !stat(clone_data_path, &st) && + !dir_contains_only_dotgit(clone_data_path)) { + char *dot_git = xstrfmt("%s/.git", clone_data_path); + unlink(dot_git); + free(dot_git); + die(_("directory not empty: '%s'"), clone_data_path); + } } else { char *path; - if (clone_data->require_init && !access(clone_data_path, X_OK) && + if (clone_data->require_init && !stat(clone_data_path, &st) && !is_empty_dir(clone_data_path)) die(_("directory not empty: '%s'"), clone_data_path); if (safe_create_leading_directories_const(clone_data_path) < 0) @@ -1738,6 +1787,23 @@ static int clone_submodule(const struct module_clone_data *clone_data, free(path); } + /* + * We already performed this check at the beginning of this function, + * before cloning the objects. This tries to detect racy behavior e.g. + * in parallel clones, where another process could easily have made the + * gitdir nested _after_ it was created. + * + * To prevent further harm coming from this unintentionally-nested + * gitdir, let's disable it by deleting the `HEAD` file. + */ + if (validate_submodule_git_dir(sm_gitdir, clone_data->name) < 0) { + char *head = xstrfmt("%s/HEAD", sm_gitdir); + unlink(head); + free(head); + die(_("refusing to create/use '%s' in another submodule's " + "git dir"), sm_gitdir); + } + connect_work_tree_and_git_dir(clone_data_path, sm_gitdir, 0); p = git_pathdup_submodule(clone_data_path, "config"); @@ -2390,7 +2456,9 @@ static int remote_submodule_branch(const char *path, const char **branch) } if (!strcmp(*branch, ".")) { - const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL); + const char *refname = refs_resolve_ref_unsafe(get_main_ref_store(the_repository), + "HEAD", 0, NULL, + NULL); if (!refname) return die_message(_("No such ref: %s"), "HEAD"); @@ -2517,6 +2585,9 @@ static int update_submodule(struct update_data *update_data) { int ret; + if (validate_submodule_path(update_data->sm_path) < 0) + return -1; + ret = determine_submodule_update_strategy(the_repository, update_data->just_cloned, update_data->sm_path, @@ -2624,12 +2695,21 @@ static int update_submodules(struct update_data *update_data) for (i = 0; i < suc.update_clone_nr; i++) { struct update_clone_data ucd = suc.update_clone[i]; - int code; + int code = 128; oidcpy(&update_data->oid, &ucd.oid); update_data->just_cloned = ucd.just_cloned; update_data->sm_path = ucd.sub->path; + /* + * Verify that the submodule path does not contain any + * symlinks; if it does, it might have been tampered with. + * TODO: allow exempting it via + * `safe.submodule.path` or something + */ + if (validate_submodule_path(update_data->sm_path) < 0) + goto fail; + code = ensure_core_worktree(update_data->sm_path); if (code) goto fail; @@ -2796,7 +2876,8 @@ static int push_check(int argc, const char **argv, const char *prefix UNUSED) argv++; argc--; /* Get the submodule's head ref and determine if it is detached */ - head = resolve_refdup("HEAD", 0, &head_oid, NULL); + head = refs_resolve_refdup(get_main_ref_store(the_repository), "HEAD", + 0, &head_oid, NULL); if (!head) die(_("Failed to resolve HEAD as a valid ref.")); if (!strcmp(head, "HEAD")) @@ -3243,21 +3324,21 @@ static void die_on_index_match(const char *path, int force) char *ps_matched = xcalloc(ps.nr, 1); /* TODO: audit for interaction with sparse-index. */ - ensure_full_index(&the_index); + ensure_full_index(the_repository->index); /* * Since there is only one pathspec, we just need to * check ps_matched[0] to know if a cache entry matched. */ - for (i = 0; i < the_index.cache_nr; i++) { - ce_path_match(&the_index, the_index.cache[i], &ps, + for (i = 0; i < the_repository->index->cache_nr; i++) { + ce_path_match(the_repository->index, the_repository->index->cache[i], &ps, ps_matched); if (ps_matched[0]) { if (!force) die(_("'%s' already exists in the index"), path); - if (!S_ISGITLINK(the_index.cache[i]->ce_mode)) + if (!S_ISGITLINK(the_repository->index->cache[i]->ce_mode)) die(_("'%s' already exists in the index " "and is not a submodule"), path); break; @@ -3356,6 +3437,9 @@ static int module_add(int argc, const char **argv, const char *prefix) normalize_path_copy(add_data.sm_path, add_data.sm_path); strip_dir_trailing_slashes(add_data.sm_path); + if (validate_submodule_path(add_data.sm_path) < 0) + exit(128); + die_on_index_match(add_data.sm_path, force); die_on_repo_without_commits(add_data.sm_path); |