sdlog2: Free log buffer on log stop

src/modules/sdlog2/logbuffer.c

@@ -143,3 +143,10 @@ void logbuffer_mark_read(struct logbuffer_s *lb, int n)
 {
 	lb->read_ptr = (lb->read_ptr + n) % lb->size;
 }
+
+void logbuffer_free(struct logbuffer_s *lb)
+{
+	if (lb->data) {
+		free(lb->data);
+	}
+}

src/modules/sdlog2/logbuffer.h

@@ -65,4 +65,6 @@ int logbuffer_get_ptr(struct logbuffer_s *lb, void **ptr, bool *is_part);
 
 void logbuffer_mark_read(struct logbuffer_s *lb, int n);
 
+void logbuffer_free(struct logbuffer_s *lb);
+
 #endif

src/modules/sdlog2/sdlog2.c

@@ -771,6 +771,9 @@ void sdlog2_stop_log()
 	/* free log writer performance counter */
 	perf_free(perf_write);
 
+	/* free log buffer */
+	logbuffer_free(&lb);
+
 	mavlink_and_console_log_info(mavlink_fd, "[blackbox] recording stopped");
 
 	sdlog2_status();