From d2725078f0da567eb2bcae3bef53f013d7fa3ba5 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 17 Jan 2019 18:15:37 +0100
Subject: [PATCH] sd-bus: make sure dispatch_rqueue() initializes return
 parameter on all types of success

Let's make sure our own code follows coding style and initializes all
return values on all types of success (and leaves it uninitialized in
all types of failure).

(cherry picked from commit c0bc4ec5cc17ac61773d1e9362b0ffa8382c1ff1)
Related: CVE-2020-1712
---
 src/libsystemd/sd-bus/sd-bus.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 64026f7ee1..55b008cc9f 100644
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -1814,8 +1814,10 @@ static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd
                 r = bus_read_message(bus, hint_priority, priority);
                 if (r < 0)
                         return r;
-                if (r == 0)
+                if (r == 0) {
+                        *m = NULL;
                         return ret;
+                }
 
                 ret = 1;
         }