On Wed, Apr 15, 2015 at 02:30:17PM -0700, Junio C Hamano wrote:
> I spoke too soon. There are two error-exit paths in this function.
>
> -- >8 --
> A broken or badly formatted commit might not record author or
> committer lines or we may not find a valid name on them. The
> function record_person() returned after calling get_commit_buffer()
> without calling unuse_commit_buffer() on the memory it obtained in
> such cases, potentially leaking it.
Looks good. Thanks for cleaning my mess. I looked over the offending
bc6b8fc1, and the other changed spots all look OK.
I note that record_person does not seem to care about the commit at all,
so an alternative fix would be:
diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c
index 1d962dc..9f0e608 100644
--- a/builtin/fmt-merge-msg.c
+++ b/builtin/fmt-merge-msg.c
@@ -223,16 +223,14 @@ static void add_branch_desc(struct strbuf *out, const char *name)
#define util_as_integral(elem) ((intptr_t)((elem)->util))
-static void record_person(int which, struct string_list *people,
- struct commit *commit)
+static void record_person_from_buf(int which, struct string_list *people,
+ const char *buffer)
{
- const char *buffer;
char *name_buf, *name, *name_end;
struct string_list_item *elem;
const char *field;
field = (which == 'a') ? "\nauthor " : "\ncommitter ";
- buffer = get_commit_buffer(commit, NULL);
name = strstr(buffer, field);
if (!name)
return;
@@ -245,7 +243,6 @@ static void record_person(int which, struct string_list *people,
if (name_end < name)
return;
name_buf = xmemdupz(name, name_end - name + 1);
- unuse_commit_buffer(commit, buffer);
elem = string_list_lookup(people, name_buf);
if (!elem) {
@@ -256,6 +253,14 @@ static void record_person(int which, struct string_list *people,
free(name_buf);
}
+static void record_person(int which, struct string_list *people,
+ struct commit *commit)
+{
+ const char *buf = get_commit_buffer(commit, NULL);
+ record_person_from_buf(which, people, buf);
+ unuse_commit_buffer(commit, buf);
+}
+
static int cmp_string_list_util_as_integral(const void *a_, const void *b_)
{
const struct string_list_item *a = a_, *b = b_;
This has the slight advantage that it adapts naturally if record_person
grows more exits, but I don't think it is a big deal either way (it only
matters if the new exit fails to copy the surrounding code and use "goto
leave").
-Peff
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