out_es: create space for header before use

graphaelli · edsiper · commit 912b7d783a32 · 2025-10-08T07:42:21.000-06:00
Signed-off-by: Gil Raphaelli &lt;graphaelli@gmail.com&gt;
diff --git a/plugins/out_es/es.c b/plugins/out_es/es.c
@@ -890,11 +890,13 @@ static void cb_es_flush(struct flb_event_chunk *event_chunk,
         flb_http_basic_auth(c, ctx->cloud_user, ctx->cloud_passwd);
     }
     else if (ctx->http_api_key) {
-        header_line = flb_sds_printf(NULL, "ApiKey %s", ctx->http_api_key);
+        /* 7 for ApiKey + space */
+        header_line = flb_sds_create_size(strlen(ctx->http_api_key)+7);
         if (header_line == NULL) {
             flb_plg_error(ctx->ins, "failed to format API key auth header");
             goto retry;
         }
+        header_line = flb_sds_printf(&header_line, "ApiKey %s", ctx->http_api_key);
 
         if (flb_http_add_header(c,
                                 FLB_HTTP_HEADER_AUTH, strlen(FLB_HTTP_HEADER_AUTH),

Original file line number	Diff line number	Diff line change
`@@ -890,11 +890,13 @@ static void cb_es_flush(struct flb_event_chunk *event_chunk,`
`890`	`890`	`flb_http_basic_auth(c, ctx->cloud_user, ctx->cloud_passwd);`
`891`	`891`	`}`
`892`	`892`	`else if (ctx->http_api_key) {`
`893`		`- header_line = flb_sds_printf(NULL, "ApiKey %s", ctx->http_api_key);`
	`893`	`+ /* 7 for ApiKey + space */`
	`894`	`+ header_line = flb_sds_create_size(strlen(ctx->http_api_key)+7);`
`894`	`895`	`if (header_line == NULL) {`
`895`	`896`	`flb_plg_error(ctx->ins, "failed to format API key auth header");`
`896`	`897`	`goto retry;`
`897`	`898`	`}`
	`899`	`+ header_line = flb_sds_printf(&header_line, "ApiKey %s", ctx->http_api_key);`
`898`	`900`
`899`	`901`	`if (flb_http_add_header(c,`
`900`	`902`	`FLB_HTTP_HEADER_AUTH, strlen(FLB_HTTP_HEADER_AUTH),`