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117 lines
3.9 KiB
117 lines
3.9 KiB
From deb9e6ad3a1d7cfbc3b53d1e74cda6ae398a90fd Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Tue, 10 Nov 2020 10:38:37 +0100
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Subject: [PATCH] sd-event: update state at the end in event_source_enable
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Coverity in CID#1435966 was complaining that s->enabled is not "restored" in
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all cases. But the code was actually correct, since it should only be
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"restored" in the error paths. But let's still make this prettier by not setting
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the state before all operations that may fail are done.
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We need to set .enabled for the prioq reshuffling operations, so move those down.
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No functional change intended.
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(cherry picked from commit d2eafe61ca07f8300dc741a0491a914213fa2b6b)
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Related: #1819868
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---
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src/libsystemd/sd-event/sd-event.c | 51 +++++++++++++++++-------------
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1 file changed, 29 insertions(+), 22 deletions(-)
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diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
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index 34b42c298f..0cfba8fb39 100644
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--- a/src/libsystemd/sd-event/sd-event.c
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+++ b/src/libsystemd/sd-event/sd-event.c
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@@ -2352,11 +2352,11 @@ static int event_source_disable(sd_event_source *s) {
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return 0;
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}
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-static int event_source_enable(sd_event_source *s, int m) {
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+static int event_source_enable(sd_event_source *s, int enable) {
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int r;
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assert(s);
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- assert(IN_SET(m, SD_EVENT_ON, SD_EVENT_ONESHOT));
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+ assert(IN_SET(enable, SD_EVENT_ON, SD_EVENT_ONESHOT));
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assert(s->enabled == SD_EVENT_OFF);
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/* Unset the pending flag when this event source is enabled */
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@@ -2366,31 +2366,16 @@ static int event_source_enable(sd_event_source *s, int m) {
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return r;
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}
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- s->enabled = m;
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-
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switch (s->type) {
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-
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case SOURCE_IO:
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- r = source_io_register(s, m, s->io.events);
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- if (r < 0) {
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- s->enabled = SD_EVENT_OFF;
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+ r = source_io_register(s, enable, s->io.events);
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+ if (r < 0)
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return r;
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- }
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-
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- break;
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-
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- case SOURCE_TIME_REALTIME:
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- case SOURCE_TIME_BOOTTIME:
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- case SOURCE_TIME_MONOTONIC:
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- case SOURCE_TIME_REALTIME_ALARM:
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- case SOURCE_TIME_BOOTTIME_ALARM:
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- event_source_time_prioq_reshuffle(s);
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break;
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case SOURCE_SIGNAL:
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r = event_make_signal_data(s->event, s->signal.sig, NULL);
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if (r < 0) {
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- s->enabled = SD_EVENT_OFF;
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event_gc_signal_data(s->event, &s->priority, s->signal.sig);
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return r;
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}
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@@ -2411,10 +2396,12 @@ static int event_source_enable(sd_event_source *s, int m) {
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break;
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+ case SOURCE_TIME_REALTIME:
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+ case SOURCE_TIME_BOOTTIME:
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+ case SOURCE_TIME_MONOTONIC:
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+ case SOURCE_TIME_REALTIME_ALARM:
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+ case SOURCE_TIME_BOOTTIME_ALARM:
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case SOURCE_EXIT:
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- prioq_reshuffle(s->event->exit, s, &s->exit.prioq_index);
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- break;
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-
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case SOURCE_DEFER:
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case SOURCE_POST:
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case SOURCE_INOTIFY:
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@@ -2424,6 +2411,26 @@ static int event_source_enable(sd_event_source *s, int m) {
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assert_not_reached("Wut? I shouldn't exist.");
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}
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+ s->enabled = enable;
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+
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+ /* Non-failing operations below */
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+ switch (s->type) {
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+ case SOURCE_TIME_REALTIME:
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+ case SOURCE_TIME_BOOTTIME:
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+ case SOURCE_TIME_MONOTONIC:
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+ case SOURCE_TIME_REALTIME_ALARM:
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+ case SOURCE_TIME_BOOTTIME_ALARM:
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+ event_source_time_prioq_reshuffle(s);
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+ break;
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+
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+ case SOURCE_EXIT:
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+ prioq_reshuffle(s->event->exit, s, &s->exit.prioq_index);
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+ break;
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+
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+ default:
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+ break;
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+ }
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+
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return 0;
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}
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