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From 19a5f184904952d20cf1a6ea81e6e295fe991765 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: Fri, 8 Nov 2013 08:41:13 -0500
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Subject: [PATCH] systemd: fix memory leak in cgroup code
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If the unit already was in the hashmap, path would be leaked.
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---
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src/core/cgroup.c | 24 +++++++++++++-----------
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1 file changed, 13 insertions(+), 11 deletions(-)
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diff --git a/src/core/cgroup.c b/src/core/cgroup.c
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index 8bf4d89..b60707c 100644
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--- a/src/core/cgroup.c
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+++ b/src/core/cgroup.c
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@@ -376,23 +376,23 @@ static CGroupControllerMask unit_get_siblings_mask(Unit *u) {
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}
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static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
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- char *path = NULL;
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+ _cleanup_free_ char *path;
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int r;
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- bool is_in_hash = false;
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+ bool was_in_hash = false;
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assert(u);
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path = unit_default_cgroup_path(u);
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if (!path)
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- return -ENOMEM;
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+ return log_oom();
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r = hashmap_put(u->manager->cgroup_unit, path, u);
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if (r == 0)
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- is_in_hash = true;
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-
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- if (r < 0) {
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- log_error("cgroup %s exists already: %s", path, strerror(-r));
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- free(path);
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+ was_in_hash = true;
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+ else if (r < 0) {
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+ log_error(r == -EEXIST ?
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+ "cgroup %s exists already: %s" : "hashmap_put failed for %s: %s",
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+ path, strerror(-r));
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return r;
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}
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@@ -405,13 +405,15 @@ static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
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if (u->cgroup_path) {
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r = cg_migrate_everywhere(u->manager->cgroup_supported, u->cgroup_path, path);
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if (r < 0)
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- log_error("Failed to migrate cgroup %s: %s", path, strerror(-r));
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+ log_error("Failed to migrate cgroup from %s to %s: %s",
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+ u->cgroup_path, path, strerror(-r));
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}
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- if (!is_in_hash) {
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- /* And remember the new data */
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+ if (!was_in_hash) {
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+ /* Remember the new data */
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free(u->cgroup_path);
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u->cgroup_path = path;
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+ path = NULL;
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}
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u->cgroup_realized = true;
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