fetch_pack() can call remove_duplicates() on its input array and
this will possibly overwrite an earlier entry with a later one if
there are any duplicates in the input array. In such a case the
caller here might then attempt to free an item multiple times as
it goes through its cleanup.
I also forgot to free the heads array we pass down into fetch_pack()
when I introduced the allocation of it in this function during my
builtin-fetch cleanup series. Better free it while we are here
working on related memory management fixes.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
transport.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/transport.c b/transport.c
index 0882edd..0338ed4 100644
--- a/transport.c
+++ b/transport.c
@@ -311,6 +311,7 @@ static int fetch_refs_via_pack(struct transport *transport,
{
struct git_transport_data *data = transport->data;
char **heads = xmalloc(nr_heads * sizeof(*heads));
+ char **origh = xmalloc(nr_heads * sizeof(*origh));
struct ref *refs;
char *dest = xstrdup(transport->url);
struct fetch_pack_args args;
@@ -329,11 +330,13 @@ static int fetch_refs_via_pack(struct transport *transport,
setup_fetch_pack(&args);
for (i = 0; i < nr_heads; i++)
- heads[i] = xstrdup(to_fetch[i]->name);
+ origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
refs = fetch_pack(dest, nr_heads, heads, &transport->pack_lockfile);
for (i = 0; i < nr_heads; i++)
- free(heads[i]);
+ free(origh[i]);
+ free(origh);
+ free(heads);
free_refs(refs);
free(dest);
return 0;
--
1.5.3.1.921.g8c3b
-
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