From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Mon, 9 Nov 2020 05:33:16 +0000 (+0900)
Subject: sd-bus: fix possible division by 0
X-Git-Tag: v247-rc2~17^2~1
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=291bb0b01cae22c3c14882fd5a0ad557c92d9298;p=thirdparty%2Fsystemd.git

sd-bus: fix possible division by 0

Fixes #17541.
---

diff --git a/src/libsystemd/sd-bus/bus-message.c b/src/libsystemd/sd-bus/bus-message.c
index f966dda2294..b8cd5e64177 100644
--- a/src/libsystemd/sd-bus/bus-message.c
+++ b/src/libsystemd/sd-bus/bus-message.c
@@ -3189,6 +3189,8 @@ static int container_next_item(sd_bus_message *m, struct bus_container *c, size_
                 int sz;
 
                 sz = bus_gvariant_get_size(c->signature);
+                if (sz == 0)
+                        return -EBADMSG;
                 if (sz < 0) {
                         int alignment;