trace: free memory allocated by blobmsg_format_json_indent()

[project/procd.git] / trace / trace.c

diff --git a/trace/trace.c b/trace/trace.c
index 8d90b5ee7fa5e03c99e02e917edb82e15e7f94d0..87a98a632b5e42eb041357dce417022239006282 100644 (file)
--- a/trace/trace.c
+++ b/trace/trace.c
@@ -162,7 +162,12 @@ static void print_syscalls(int policy, const char *json)
        if (json) {
                FILE *fp = fopen(json, "w");
                if (fp) {
-                       fprintf(fp, "%s\n", blobmsg_format_json_indent(b.head, true, 0));
+                       tmp = blobmsg_format_json_indent(b.head, true, 0);
+                       if (!tmp)
+                               return;
+
+                       free(tmp);
+                       fprintf(fp, "%s\n", tmp);
                        fclose(fp);
                        ULOG_INFO("saving syscall trace to %s\n", json);
                } else {
@@ -176,7 +181,6 @@ static void print_syscalls(int policy, const char *json)
                printf("%s\n", tmp);
                free(tmp);
        }
-
 }
 
 static void report_seccomp_vialation(pid_t pid, unsigned syscall)