[PATCH 12/14] range-diff: plug memory leak in common invocation
- From
Ævar Arnfjörð Bjarmason <avarab@gmail.com>
- Date
- Mar 2, 2022, 17:10 UTC
- Message-ID
- <patch-12.14-6d13c2530db-20220302T170718Z-avarab@gmail.com>
- In-Reply-To
- <cover-00.14-00000000000-20220302T170718Z-avarab@gmail.com>
Create a public release_patch() version of the private free_patch() function added in 13b5af22f39 (apply: move libified code from builtin/apply.c to apply.{c,h}, 2016-04-22). Unlike the existing function this one doesn't free() the "struct patch" itself, so we can use it for variables on the stack.
Use it in range-diff.c to fix a memory leak in common range-diff invocations, e.g.:
git -P range-diff origin/master origin/next origin/seen
Would emit several errors when compiled with SANITIZE=leak, but now runs cleanly.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> --- apply.c | 7 ++++++- apply.h | 2 ++ range-diff.c | 1 + 3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/apply.c b/apply.c index 0912307bd91..01f91816428 100644 --- a/apply.c +++ b/apply.c @@ -219,13 +219,18 @@ static void free_fragment_list(struct fragment *list) } } -static void free_patch(struct patch *patch) +void release_patch(struct patch *patch) { free_fragment_list(patch->fragments); free(patch->def_name); free(patch->old_name); free(patch->new_name); free(patch->result); +} + +static void free_patch(struct patch *patch) +{ + release_patch(patch); free(patch); } diff --git a/apply.h b/apply.h index 4052da50c06..b9f18ce87d1 100644 --- a/apply.h +++ b/apply.h @@ -173,6 +173,8 @@ int parse_git_diff_header(struct strbuf *root, unsigned int size, struct patch *patch); +void release_patch(struct patch *patch); + /* * Some aspects of the apply behavior are controlled by the following * bits in the "options" parameter passed to apply_all_patches(). diff --git a/range-diff.c b/range-diff.c index 30a4de5c2d8..b2a2961f521 100644 --- a/range-diff.c +++ b/range-diff.c @@ -165,6 +165,7 @@ static int read_patches(const char *range, struct string_list *list, patch.old_mode, patch.new_mode); strbuf_addstr(&buf, " ##"); + release_patch(&patch); } else if (in_header) { if (starts_with(line, "Author: ")) { strbuf_addstr(&buf, " ## Metadata ##\n");
-- 2.35.1.1228.g56895c6ee86