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From d3d0969d7c366d6bb2f66501e61cbcd11a60face Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Sun, 17 Apr 2022 07:05:07 +0900
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Subject: [PATCH] sd-bus: fix reference counter to be incremented
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Fixes #23097.
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(cherry picked from commit b21f237d996c8c18991a68e1204f060d07dc4745)
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[msekleta: This commit also contains the hunk from c2d7dd35d2
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(in sd_bus_track_remove_name). I've decided to not backport that commit
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fully because of conflicts and because its was made largely irrelevant
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by 7f40cb7c86]
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Related: #2084052
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---
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src/libsystemd/sd-bus/bus-track.c | 15 +++++++--------
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1 file changed, 7 insertions(+), 8 deletions(-)
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diff --git a/src/libsystemd/sd-bus/bus-track.c b/src/libsystemd/sd-bus/bus-track.c
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index 16bf615f50..b1ec5ecbbb 100644
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--- a/src/libsystemd/sd-bus/bus-track.c
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+++ b/src/libsystemd/sd-bus/bus-track.c
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@@ -208,12 +208,12 @@ _public_ int sd_bus_track_add_name(sd_bus_track *track, const char *name) {
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i = hashmap_get(track->names, name);
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if (i) {
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if (track->recursive) {
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- unsigned k = track->n_ref + 1;
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+ unsigned k = i->n_ref + 1;
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- if (k < track->n_ref) /* Check for overflow */
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+ if (k < i->n_ref) /* Check for overflow */
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return -EOVERFLOW;
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- track->n_ref = k;
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+ i->n_ref = k;
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}
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bus_track_remove_from_queue(track);
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@@ -281,14 +281,13 @@ _public_ int sd_bus_track_remove_name(sd_bus_track *track, const char *name) {
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i = hashmap_get(track->names, name);
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if (!i)
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return -EUNATCH;
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- if (i->n_ref <= 0)
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- return -EUNATCH;
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-
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- i->n_ref--;
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- if (i->n_ref <= 0)
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+ assert(i->n_ref >=1);
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+ if (i->n_ref <= 1)
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return bus_track_remove_name_fully(track, name);
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+ i->n_ref--;
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+
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return 1;
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}
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