Re: [PATCH v2 3/4] SANITIZE tests: fix memory leaks in t5701*, add to whitelist

Fix a memory leak in a2ba162cda (object-info: support for retrieving
object info, 2021-04-20) which appears to have been based on a
misunderstanding of how the pkt-line.c API works, there is no need to
strdup() input to, it's just a printf()-like format function.

This fixes a potentially large memory leak, since the number of OID
lines the "object-info" call can be arbitrarily large (or a small one
if the request is small).

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
  protocol-caps.c      | 5 +++--
  t/t5701-git-serve.sh | 1 +
  2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/protocol-caps.c b/protocol-caps.c
index 13a9e63a04..901b6795e4 100644
--- a/protocol-caps.c
+++ b/protocol-caps.c

@@ -69,9 +69,10 @@ static void send_info(struct repository *r, struct packet_writer *writer,
  			}
  		}
  
-		packet_writer_write(writer, "%s",
-				    strbuf_detach(&send_buffer, NULL));
+		packet_writer_write(writer, "%s", send_buffer.buf);
+		strbuf_reset(&send_buffer);
  	}
+	strbuf_release(&send_buffer);
  }