From 187b623eeff215b56d8e45ebab1de899e974383a Mon Sep 17 00:00:00 2001 From: Patrick Steinhardt Date: Wed, 14 Aug 2024 08:52:20 +0200 Subject: builtin/notes: fix leaking `struct notes_tree` when merging notes We allocate a `struct notes_tree` in `merge_commit()` which we then initialize via `init_notes()`. It's not really necessary to allocate the structure though given that we never pass ownership to the caller. Furthermore, the allocation leads to a memory leak because despite its name, `free_notes()` doesn't free the `notes_tree` but only clears it. Fix this issue by converting the code to use an on-stack variable. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano --- builtin/notes.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'builtin/notes.c') diff --git a/builtin/notes.c b/builtin/notes.c index d9c356e354..81cbaeec6b 100644 --- a/builtin/notes.c +++ b/builtin/notes.c @@ -807,7 +807,7 @@ static int merge_commit(struct notes_merge_options *o) { struct strbuf msg = STRBUF_INIT; struct object_id oid, parent_oid; - struct notes_tree *t; + struct notes_tree t = {0}; struct commit *partial; struct pretty_print_context pretty_ctx; void *local_ref_to_free; @@ -830,8 +830,7 @@ static int merge_commit(struct notes_merge_options *o) else oidclr(&parent_oid, the_repository->hash_algo); - CALLOC_ARRAY(t, 1); - init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0); + init_notes(&t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0); o->local_ref = local_ref_to_free = refs_resolve_refdup(get_main_ref_store(the_repository), @@ -839,7 +838,7 @@ static int merge_commit(struct notes_merge_options *o) if (!o->local_ref) die(_("failed to resolve NOTES_MERGE_REF")); - if (notes_merge_commit(o, t, partial, &oid)) + if (notes_merge_commit(o, &t, partial, &oid)) die(_("failed to finalize notes merge")); /* Reuse existing commit message in reflog message */ @@ -853,7 +852,7 @@ static int merge_commit(struct notes_merge_options *o) is_null_oid(&parent_oid) ? NULL : &parent_oid, 0, UPDATE_REFS_DIE_ON_ERR); - free_notes(t); + free_notes(&t); strbuf_release(&msg); ret = merge_abort(o); free(local_ref_to_free); -- cgit v1.2.3