From: Patrick Steinhardt Date: Mon, 27 May 2024 11:47:23 +0000 (+0200) Subject: builtin/mv: fix leaks for submodule gitfile paths X-Git-Tag: v2.46.0-rc0~76^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ebdbefa4fe9f618347124b37d44e517e0c6a3e4c;p=thirdparty%2Fgit.git builtin/mv: fix leaks for submodule gitfile paths Similar to the preceding commit, we have effectively given tracking memory ownership of submodule gitfile paths. Refactor the code to start tracking allocated strings in a separate `struct strvec` such that we can easily plug those leaks. Mark now-passing tests as leak free. Note that ideally, we wouldn't require two separate data structures to track those paths. But we do need to store `NULL` pointers for the gitfile paths such that we can indicate that its corresponding entries in the other arrays do not have such a path at all. And given that `struct strvec`s cannot store `NULL` pointers we cannot use them to store this information. There is another small gotcha that is easy to miss: you may be wondering why we don't want to store `SUBMODULE_WITH_GITDIR` in the strvec. This is because this is a mere sentinel value and not actually a string at all. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano --- diff --git a/builtin/mv.c b/builtin/mv.c index e461d29ca1..81ca910de6 100644 --- a/builtin/mv.c +++ b/builtin/mv.c @@ -82,21 +82,23 @@ static char *add_slash(const char *path) #define SUBMODULE_WITH_GITDIR ((const char *)1) -static void prepare_move_submodule(const char *src, int first, - const char **submodule_gitfile) +static const char *submodule_gitfile_path(const char *src, int first) { struct strbuf submodule_dotgit = STRBUF_INIT; + const char *path; + if (!S_ISGITLINK(the_repository->index->cache[first]->ce_mode)) die(_("Directory %s is in index and no submodule?"), src); if (!is_staging_gitmodules_ok(the_repository->index)) die(_("Please stage your changes to .gitmodules or stash them to proceed")); + strbuf_addf(&submodule_dotgit, "%s/.git", src); - *submodule_gitfile = read_gitfile(submodule_dotgit.buf); - if (*submodule_gitfile) - *submodule_gitfile = xstrdup(*submodule_gitfile); - else - *submodule_gitfile = SUBMODULE_WITH_GITDIR; + + path = read_gitfile(submodule_dotgit.buf); strbuf_release(&submodule_dotgit); + if (path) + return path; + return SUBMODULE_WITH_GITDIR; } static int index_range_of_same_dir(const char *src, int length, @@ -170,7 +172,8 @@ int cmd_mv(int argc, const char **argv, const char *prefix) struct strvec sources = STRVEC_INIT; struct strvec dest_paths = STRVEC_INIT; struct strvec destinations = STRVEC_INIT; - const char **submodule_gitfile; + struct strvec submodule_gitfiles_to_free = STRVEC_INIT; + const char **submodule_gitfiles; char *dst_w_slash = NULL; const char **src_dir = NULL; int src_dir_nr = 0, src_dir_alloc = 0; @@ -208,7 +211,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix) flags = 0; internal_prefix_pathspec(&dest_paths, prefix, argv + argc, 1, flags); dst_w_slash = add_slash(dest_paths.v[0]); - submodule_gitfile = xcalloc(argc, sizeof(char *)); + submodule_gitfiles = xcalloc(argc, sizeof(char *)); if (dest_paths.v[0][0] == '\0') /* special case: "." was normalized to "" */ @@ -306,8 +309,10 @@ dir_check: int first = index_name_pos(the_repository->index, src, length), last; if (first >= 0) { - prepare_move_submodule(src, first, - submodule_gitfile + i); + const char *path = submodule_gitfile_path(src, first); + if (path != SUBMODULE_WITH_GITDIR) + path = strvec_push(&submodule_gitfiles_to_free, path); + submodule_gitfiles[i] = path; goto act_on_entry; } else if (index_range_of_same_dir(src, length, &first, &last) < 1) { @@ -323,7 +328,7 @@ dir_check: n = argc + last - first; REALLOC_ARRAY(modes, n); - REALLOC_ARRAY(submodule_gitfile, n); + REALLOC_ARRAY(submodule_gitfiles, n); dst_with_slash = add_slash(dst); dst_with_slash_len = strlen(dst_with_slash); @@ -338,7 +343,7 @@ dir_check: memset(modes + argc + j, 0, sizeof(enum update_mode)); modes[argc + j] |= ce_skip_worktree(ce) ? SPARSE : INDEX; - submodule_gitfile[argc + j] = NULL; + submodule_gitfiles[argc + j] = NULL; free(prefixed_path); } @@ -427,8 +432,8 @@ remove_entry: strvec_remove(&sources, i); strvec_remove(&destinations, i); MOVE_ARRAY(modes + i, modes + i + 1, n); - MOVE_ARRAY(submodule_gitfile + i, - submodule_gitfile + i + 1, n); + MOVE_ARRAY(submodule_gitfiles + i, + submodule_gitfiles + i + 1, n); i--; } } @@ -462,12 +467,12 @@ remove_entry: continue; die_errno(_("renaming '%s' failed"), src); } - if (submodule_gitfile[i]) { + if (submodule_gitfiles[i]) { if (!update_path_in_gitmodules(src, dst)) gitmodules_modified = 1; - if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR) + if (submodule_gitfiles[i] != SUBMODULE_WITH_GITDIR) connect_work_tree_and_git_dir(dst, - submodule_gitfile[i], + submodule_gitfiles[i], 1); } @@ -573,7 +578,8 @@ out: strvec_clear(&sources); strvec_clear(&dest_paths); strvec_clear(&destinations); - free(submodule_gitfile); + strvec_clear(&submodule_gitfiles_to_free); + free(submodule_gitfiles); free(modes); return ret; } diff --git a/t/t4059-diff-submodule-not-initialized.sh b/t/t4059-diff-submodule-not-initialized.sh index d489230df8..668f526303 100755 --- a/t/t4059-diff-submodule-not-initialized.sh +++ b/t/t4059-diff-submodule-not-initialized.sh @@ -9,6 +9,7 @@ This test tries to verify that add_submodule_odb works when the submodule was initialized previously but the checkout has since been removed. ' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # Tested non-UTF-8 encoding diff --git a/t/t7001-mv.sh b/t/t7001-mv.sh index 879a6dce60..86258f9f43 100755 --- a/t/t7001-mv.sh +++ b/t/t7001-mv.sh @@ -1,6 +1,8 @@ #!/bin/sh test_description='git mv in subdirs' + +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-diff-data.sh diff --git a/t/t7417-submodule-path-url.sh b/t/t7417-submodule-path-url.sh index 5e3051da8b..dbbb3853dc 100755 --- a/t/t7417-submodule-path-url.sh +++ b/t/t7417-submodule-path-url.sh @@ -4,6 +4,7 @@ test_description='check handling of .gitmodule path with dash' GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh test_expect_success 'setup' ' diff --git a/t/t7421-submodule-summary-add.sh b/t/t7421-submodule-summary-add.sh index ce64d8b137..479c8fdde1 100755 --- a/t/t7421-submodule-summary-add.sh +++ b/t/t7421-submodule-summary-add.sh @@ -10,6 +10,7 @@ while making sure to add submodules using `git submodule add` instead of `git add` as done in t7401. ' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh test_expect_success 'setup' '