From: Johannes Schindelin <johannes.schindelin@xxxxxx> In 93b980e58f5 (http: use xmalloc with cURL, 2019-08-15), we started to ask cURL to use `xmalloc()`, and if compiled with nedmalloc, that means implicitly a different allocator than the system one. Which means that all of cURL's allocations and releases now _need_ to use that allocator. However, the `http_options()` function used `slist_append()` to add any configured extra HTTP header(s) _before_ asking cURL to use `xmalloc()`, and `http_cleanup()` would release them _afterwards_, i.e. in the presence of custom allocators, cURL would attempt to use the wrong allocator to release the memory. A naïve attempt at fixing this would move the call to `curl_global_init()` _before_ the config is parsed (i.e. before that call to `slist_append()`). However, that does work, as we _also_ parse the config setting `http.sslbackend` and if found, call `curl_global_sslset()` which *must* be called before `curl_global_init()`, for details see: https://curl.haxx.se/libcurl/c/curl_global_sslset.html So let's instead make the config parsing entirely independent from cURL's data structures. Incidentally, this deletes two more lines than it introduces, which is nice. Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx> --- http.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/http.c b/http.c index 27aa0a3192..82f493c7fd 100644 --- a/http.c +++ b/http.c @@ -150,7 +150,7 @@ static unsigned long empty_auth_useless = static struct curl_slist *pragma_header; static struct curl_slist *no_pragma_header; -static struct curl_slist *extra_http_headers; +static struct string_list extra_http_headers = STRING_LIST_INIT_DUP; static struct active_request_slot *active_queue_head; @@ -414,11 +414,9 @@ static int http_options(const char *var, const char *value, void *cb) if (!value) { return config_error_nonbool(var); } else if (!*value) { - curl_slist_free_all(extra_http_headers); - extra_http_headers = NULL; + string_list_clear(&extra_http_headers, 0); } else { - extra_http_headers = - curl_slist_append(extra_http_headers, value); + string_list_append(&extra_http_headers, value); } return 0; } @@ -1199,8 +1197,7 @@ void http_cleanup(void) #endif curl_global_cleanup(); - curl_slist_free_all(extra_http_headers); - extra_http_headers = NULL; + string_list_clear(&extra_http_headers, 0); curl_slist_free_all(pragma_header); pragma_header = NULL; @@ -1624,10 +1621,11 @@ int run_one_slot(struct active_request_slot *slot, struct curl_slist *http_copy_default_headers(void) { - struct curl_slist *headers = NULL, *h; + struct curl_slist *headers = NULL; + const struct string_list_item *item; - for (h = extra_http_headers; h; h = h->next) - headers = curl_slist_append(headers, h->data); + for_each_string_list_item(item, &extra_http_headers) + headers = curl_slist_append(headers, item->string); return headers; } -- gitgitgadget
