From: Frantisek Sumsal <frantisek@sumsal.cz>
Date: Sun, 21 May 2023 19:00:26 +0000 (+0200)
Subject: shared: correctly propagate possible allocation errors
X-Git-Tag: v254-rc1~419^2~6
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=3575c371697a07995c3e65ae03aed55262ab00ed;p=thirdparty%2Fsystemd.git

shared: correctly propagate possible allocation errors

instead of just asserting in case the memstream couldn't be resized.

Found by Nallocufuzz.
---

diff --git a/src/shared/json.c b/src/shared/json.c
index 8962173b3ae..904b26f9867 100644
--- a/src/shared/json.c
+++ b/src/shared/json.c
@@ -1788,7 +1788,9 @@ int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) {
                 if (!f)
                         return -ENOMEM;
 
-                json_variant_dump(v, flags, f, NULL);
+                r = json_variant_dump(v, flags, f, NULL);
+                if (r < 0)
+                        return r;
 
                 /* Add terminating 0, so that the output buffer is a valid string. */
                 fputc('\0', f);