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From 39e9bd0412bef0c37d487834b8be3a78e28cb804 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sun, 17 Apr 2022 07:05:07 +0900
Subject: [PATCH] sd-bus: fix reference counter to be incremented
Fixes #23097.
(cherry picked from commit b21f237d996c8c18991a68e1204f060d07dc4745)
[msekleta: This commit also contains the hunk from c2d7dd35d2
(in sd_bus_track_remove_name). I've decided to not backport that commit
fully because of conflicts and because its was made largely irrelevant
by 7f40cb7c86]
Related: #2047373
---
src/libsystemd/sd-bus/bus-track.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/src/libsystemd/sd-bus/bus-track.c b/src/libsystemd/sd-bus/bus-track.c
index 16bf615f50..b1ec5ecbbb 100644
--- a/src/libsystemd/sd-bus/bus-track.c
+++ b/src/libsystemd/sd-bus/bus-track.c
@@ -208,12 +208,12 @@ _public_ int sd_bus_track_add_name(sd_bus_track *track, const char *name) {
i = hashmap_get(track->names, name);
if (i) {
if (track->recursive) {
- unsigned k = track->n_ref + 1;
+ unsigned k = i->n_ref + 1;
- if (k < track->n_ref) /* Check for overflow */
+ if (k < i->n_ref) /* Check for overflow */
return -EOVERFLOW;
- track->n_ref = k;
+ i->n_ref = k;
}
bus_track_remove_from_queue(track);
@@ -281,14 +281,13 @@ _public_ int sd_bus_track_remove_name(sd_bus_track *track, const char *name) {
i = hashmap_get(track->names, name);
if (!i)
return -EUNATCH;
- if (i->n_ref <= 0)
- return -EUNATCH;
-
- i->n_ref--;
- if (i->n_ref <= 0)
+ assert(i->n_ref >=1);
+ if (i->n_ref <= 1)
return bus_track_remove_name_fully(track, name);
+ i->n_ref--;
+
return 1;
}
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