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cgroup: fix potential null dereference

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new_controller() returns NULL on error, so let's check for that.

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
This commit is contained in:
Tycho Andersen
2016-09-12 18:55:00 +03:00
committed by Pavel Emelyanov
parent 44c4ef842d
commit fe2073ee2e
1 changed files with 5 additions and 1 deletions
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6
criu/cgroup.c
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@@ -567,7 +567,11 @@ static int collect_cgroups(struct list_head *ctls)
pr_err("controller %s not found\n", cc->name); pr_err("controller %s not found\n", cc->name);
return -1; return -1;
} else { } else {
struct cg_controller *nc = new_controller(cc->name); struct cg_controller *nc;
nc = new_controller(cc->name);
if (!nc)
return -1;
list_add_tail(&nc->l, &cg->l); list_add_tail(&nc->l, &cg->l);
n_cgroups++; n_cgroups++;
current_controller = nc; current_controller = nc;