pack-objects: Fix segfault when object count is less than thread count

diff --git a/transport.c b/transport.c
index 50db9807d003162c81f391e08f247bac7ce410c9..babaa21398522939076151f1c240a4f18f9a90a1 100644 (file)
--- a/transport.c
+++ b/transport.c
@@ -118,7 +118,7 @@ static void insert_packed_refs(const char *packed_refs, struct ref **list)
                if (hexval(buffer[0]) > 0xf)
                        continue;
                len = strlen(buffer);
-               if (buffer[len - 1] == '\n')
+               if (len && buffer[len - 1] == '\n')
                        buffer[--len] = '\0';
                if (len < 41)
                        continue;
@@ -426,22 +426,9 @@ static int curl_transport_push(struct transport *transport, int refspec_nr, cons
        return !!err;
 }
 
-static int missing__target(int code, int result)
-{
-       return  /* file:// URL -- do we ever use one??? */
-               (result == CURLE_FILE_COULDNT_READ_FILE) ||
-               /* http:// and https:// URL */
-               (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
-               /* ftp:// URL */
-               (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
-               ;
-}
-
-#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
-
 static struct ref *get_refs_via_curl(struct transport *transport)
 {
-       struct buffer buffer;
+       struct strbuf buffer = STRBUF_INIT;
        char *data, *start, *mid;
        char *ref_name;
        char *refs_url;
@@ -454,11 +441,6 @@ static struct ref *get_refs_via_curl(struct transport *transport)
        struct ref *ref = NULL;
        struct ref *last_ref = NULL;
 
-       data = xmalloc(4096);
-       buffer.size = 4096;
-       buffer.posn = 0;
-       buffer.buffer = data;
-
        refs_url = xmalloc(strlen(transport->url) + 11);
        sprintf(refs_url, "%s/info/refs", transport->url);
 
@@ -470,30 +452,33 @@ static struct ref *get_refs_via_curl(struct transport *transport)
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
+       if (transport->remote->http_proxy)
+               curl_easy_setopt(slot->curl, CURLOPT_PROXY,
+                                transport->remote->http_proxy);
+
        if (start_active_slot(slot)) {
                run_active_slot(slot);
                if (results.curl_result != CURLE_OK) {
+                       strbuf_release(&buffer);
                        if (missing_target(&results)) {
-                               free(buffer.buffer);
                                return NULL;
                        } else {
-                               free(buffer.buffer);
                                error("%s", curl_errorstr);
                                return NULL;
                        }
                }
        } else {
-               free(buffer.buffer);
+               strbuf_release(&buffer);
                error("Unable to start request");
                return NULL;
        }
 
        http_cleanup();
 
-       data = buffer.buffer;
+       data = buffer.buf;
        start = NULL;
        mid = data;
-       while (i < buffer.posn) {
+       while (i < buffer.len) {
                if (!start)
                        start = &data[i];
                if (data[i] == '\t')
@@ -516,7 +501,7 @@ static struct ref *get_refs_via_curl(struct transport *transport)
                i++;
        }
 
-       free(buffer.buffer);
+       strbuf_release(&buffer);
 
        return refs;
 }
@@ -655,7 +640,7 @@ static int fetch_refs_via_pack(struct transport *transport,
        free(heads);
        free_refs(refs);
        free(dest);
-       return 0;
+       return (refs ? 0 : -1);
 }
 
 static int git_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)