From: Patrick Steinhardt Date: Mon, 21 Oct 2024 09:29:07 GMT Subject: [PATCH v2 21/22] builtin/merge: release outbut buffer after performing merge Message-ID: <5e243f9ee530da417beda9230f65ccf18ae21a9e.1729502824.git.ps@pks.im> In-Reply-To: The `obuf` member of `struct merge_options` is used to buffer output in some cases. In order to not discard its allocated memory we only release its contents in `merge_finalize()` when we're not currently recursing into a subtree. This results in some situations where we seemingly do not release the buffer reliably. We thus have calls to `strbuf_release()` for this buffer scattered across the codebase. But we're missing one callsite in git-merge(1), which causes a memory leak. We should ideally refactor this interface so that callers don't have to know about any such internals. But for now, paper over the issue by adding one more `strbuf_release()` call. Signed-off-by: Patrick Steinhardt --- builtin/merge.c | 1 + t/t6424-merge-unrelated-index-changes.sh | 1 + 2 files changed, 2 insertions(+) diff --git a/builtin/merge.c b/builtin/merge.c index 84d0f3604bc..51038eaca84 100644 --- a/builtin/merge.c +++ b/builtin/merge.c @@ -754,6 +754,7 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common, clean = merge_recursive(&o, head, remoteheads->item, reversed, &result); free_commit_list(reversed); + strbuf_release(&o.obuf); if (clean < 0) { rollback_lock_file(&lock); diff --git a/t/t6424-merge-unrelated-index-changes.sh b/t/t6424-merge-unrelated-index-changes.sh index 7677c5f08d0..a7ea8acb845 100755 --- a/t/t6424-merge-unrelated-index-changes.sh +++ b/t/t6424-merge-unrelated-index-changes.sh @@ -2,6 +2,7 @@ test_description="merges with unrelated index changes" +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # Testcase for some simple merges -- 2.47.0.72.gef8ce8f3d4.dirty