[PATCH v3 06/21] http: refactor code to clarify memory ownership
- From
Patrick Steinhardt <ps@pks.im>
- Date
- May 27, 2024, 11:46 UTC
- Message-ID
- <fa91a3942edd2c26389a25bb2a5c1737151e7c12.1716810168.git.ps@pks.im>
- In-Reply-To
- <cover.1716810168.git.ps@pks.im>
There are various variables assigned via `git_config_string()` and `git_config_pathname()` which are never free'd. This bug is relatable because the out parameter of those functions are a `const char **`, even though memory ownership is transferred to the caller.
We're about to adapt the functions to instead use `char **`. Prepare the code accordingly. Note that the `(const char **)` casts will go away once we have adapted the functions.
Signed-off-by: Patrick Steinhardt <ps@pks.im> --- http.c | 62 ++++++++++++++++++++++++++++++---------------------------- 1 file changed, 32 insertions(+), 30 deletions(-)
diff --git a/http.c b/http.c index 752c879c1f..db2e2f1d39 100644 --- a/http.c +++ b/http.c @@ -39,8 +39,8 @@ char curl_errorstr[CURL_ERROR_SIZE]; static int curl_ssl_verify = -1; static int curl_ssl_try; static const char *curl_http_version = NULL; -static const char *ssl_cert; -static const char *ssl_cert_type; +static char *ssl_cert; +static char *ssl_cert_type; static const char *ssl_cipherlist; static const char *ssl_version; static struct { @@ -59,23 +59,23 @@ static struct { { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 }, #endif }; -static const char *ssl_key; -static const char *ssl_key_type; -static const char *ssl_capath; -static const char *curl_no_proxy; +static char *ssl_key; +static char *ssl_key_type; +static char *ssl_capath; +static char *curl_no_proxy; #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY static const char *ssl_pinnedkey; #endif -static const char *ssl_cainfo; +static char *ssl_cainfo; static long curl_low_speed_limit = -1; static long curl_low_speed_time = -1; static int curl_ftp_no_epsv; -static const char *curl_http_proxy; -static const char *http_proxy_authmethod; +static char *curl_http_proxy; +static char *http_proxy_authmethod; -static const char *http_proxy_ssl_cert; -static const char *http_proxy_ssl_key; -static const char *http_proxy_ssl_ca_info; +static char *http_proxy_ssl_cert; +static char *http_proxy_ssl_key; +static char *http_proxy_ssl_ca_info; static struct credential proxy_cert_auth = CREDENTIAL_INIT; static int proxy_ssl_cert_password_required; @@ -112,7 +112,7 @@ static const char *curl_cookie_file; static int curl_save_cookies; struct credential http_auth = CREDENTIAL_INIT; static int http_proactive_auth; -static const char *user_agent; +static char *user_agent; static int curl_empty_auth = -1; enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL; @@ -381,17 +381,17 @@ static int http_options(const char *var, const char *value, if (!strcmp("http.sslversion", var)) return git_config_string(&ssl_version, var, value); if (!strcmp("http.sslcert", var)) - return git_config_pathname(&ssl_cert, var, value); + return git_config_pathname((const char **)&ssl_cert, var, value); if (!strcmp("http.sslcerttype", var)) - return git_config_string(&ssl_cert_type, var, value); + return git_config_string((const char **)&ssl_cert_type, var, value); if (!strcmp("http.sslkey", var)) - return git_config_pathname(&ssl_key, var, value); + return git_config_pathname((const char **)&ssl_key, var, value); if (!strcmp("http.sslkeytype", var)) - return git_config_string(&ssl_key_type, var, value); + return git_config_string((const char **)&ssl_key_type, var, value); if (!strcmp("http.sslcapath", var)) - return git_config_pathname(&ssl_capath, var, value); + return git_config_pathname((const char **)&ssl_capath, var, value); if (!strcmp("http.sslcainfo", var)) - return git_config_pathname(&ssl_cainfo, var, value); + return git_config_pathname((const char **)&ssl_cainfo, var, value); if (!strcmp("http.sslcertpasswordprotected", var)) { ssl_cert_password_required = git_config_bool(var, value); return 0; @@ -440,19 +440,19 @@ static int http_options(const char *var, const char *value, return 0; } if (!strcmp("http.proxy", var)) - return git_config_string(&curl_http_proxy, var, value); + return git_config_string((const char **)&curl_http_proxy, var, value); if (!strcmp("http.proxyauthmethod", var)) - return git_config_string(&http_proxy_authmethod, var, value); + return git_config_string((const char **)&http_proxy_authmethod, var, value); if (!strcmp("http.proxysslcert", var)) - return git_config_string(&http_proxy_ssl_cert, var, value); + return git_config_string((const char **)&http_proxy_ssl_cert, var, value); if (!strcmp("http.proxysslkey", var)) - return git_config_string(&http_proxy_ssl_key, var, value); + return git_config_string((const char **)&http_proxy_ssl_key, var, value); if (!strcmp("http.proxysslcainfo", var)) - return git_config_string(&http_proxy_ssl_ca_info, var, value); + return git_config_string((const char **)&http_proxy_ssl_ca_info, var, value); if (!strcmp("http.proxysslcertpasswordprotected", var)) { proxy_ssl_cert_password_required = git_config_bool(var, value); @@ -476,7 +476,7 @@ static int http_options(const char *var, const char *value, } if (!strcmp("http.useragent", var)) - return git_config_string(&user_agent, var, value); + return git_config_string((const char **)&user_agent, var, value); if (!strcmp("http.emptyauth", var)) { if (value && !strcmp("auto", value)) @@ -592,10 +592,10 @@ static void init_curl_http_auth(CURL *result) } /* *var must be free-able */ -static void var_override(const char **var, char *value) +static void var_override(char **var, char *value) { if (value) { - free((void *)*var); + free(*var); *var = xstrdup(value); } } @@ -1233,11 +1233,13 @@ static CURL *get_curl_handle(void) return result; } -static void set_from_env(const char **var, const char *envname) +static void set_from_env(char **var, const char *envname) { const char *val = getenv(envname); - if (val) - *var = val; + if (val) { + FREE_AND_NULL(*var); + *var = xstrdup(val); + } } void http_init(struct remote *remote, const char *url, int proactive_auth)
-- 2.45.1.246.gb9cfe4845c.dirty