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From 8034a203bbff0aa3b53f2946dc58e409bd7246c9 Mon Sep 17 00:00:00 2001
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From: Ken Gaillot <kgaillot@redhat.com>
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Date: Thu, 20 Jan 2022 15:03:31 -0600
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Subject: [PATCH] Fix: scheduler: avoid memory leak when displaying clones
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Previously, pe__clone_default() unconditionally created a hash table for
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stopped instances, but didn't free it in every code path.
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Now, only create the table when we have something to put in it and might
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actually use it, and ensure it always gets freed.
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---
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lib/pengine/clone.c | 18 +++++++++++++-----
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1 file changed, 13 insertions(+), 5 deletions(-)
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diff --git a/lib/pengine/clone.c b/lib/pengine/clone.c
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index 742e2920b0..920a04c32c 100644
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--- a/lib/pengine/clone.c
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+++ b/lib/pengine/clone.c
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@@ -761,7 +761,7 @@ pe__clone_default(pcmk__output_t *out, va_list args)
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GList *only_node = va_arg(args, GList *);
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GList *only_rsc = va_arg(args, GList *);
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- GHashTable *stopped = pcmk__strkey_table(free, free);
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+ GHashTable *stopped = NULL;
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char *list_text = NULL;
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size_t list_text_len = 0;
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@@ -818,7 +818,11 @@ pe__clone_default(pcmk__output_t *out, va_list args)
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} else if (partially_active == FALSE) {
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// List stopped instances when requested (except orphans)
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if (!pcmk_is_set(child_rsc->flags, pe_rsc_orphan)
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+ && !pcmk_is_set(show_opts, pcmk_show_clone_detail)
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&& pcmk_is_set(show_opts, pcmk_show_inactive_rscs)) {
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+ if (stopped == NULL) {
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+ stopped = pcmk__strkey_table(free, free);
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+ }
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g_hash_table_insert(stopped, strdup(child_rsc->id), strdup("Stopped"));
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}
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@@ -873,7 +877,6 @@ pe__clone_default(pcmk__output_t *out, va_list args)
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}
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if (pcmk_is_set(show_opts, pcmk_show_clone_detail)) {
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- g_hash_table_destroy(stopped);
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PCMK__OUTPUT_LIST_FOOTER(out, rc);
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return pcmk_rc_ok;
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}
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@@ -948,8 +951,10 @@ pe__clone_default(pcmk__output_t *out, va_list args)
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GList *list = g_hash_table_get_values(rsc->allowed_nodes);
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/* Custom stopped table for non-unique clones */
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- g_hash_table_destroy(stopped);
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- stopped = pcmk__strkey_table(free, free);
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+ if (stopped != NULL) {
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+ g_hash_table_destroy(stopped);
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+ stopped = NULL;
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+ }
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if (list == NULL) {
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/* Clusters with symmetrical=false haven't calculated allowed_nodes yet
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@@ -972,6 +977,9 @@ pe__clone_default(pcmk__output_t *out, va_list args)
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state = "Stopped (disabled)";
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}
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+ if (stopped == NULL) {
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+ stopped = pcmk__strkey_table(free, free);
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+ }
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if (probe_op != NULL) {
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int rc;
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@@ -987,7 +995,7 @@ pe__clone_default(pcmk__output_t *out, va_list args)
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g_list_free(list);
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}
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- if (g_hash_table_size(stopped) > 0) {
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+ if (stopped != NULL) {
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GList *list = sorted_hash_table_values(stopped);
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clone_header(out, &rc, rsc, clone_data);
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--
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2.27.0
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