Messages in this thread Patch in this message |  | | From | Qi Zheng <> | | Subject | [PATCH] fix: mm: memcontrol: convert objcg to be per-memcg per-node type | | Date | Mon, 9 Mar 2026 19:29:39 +0800 |
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From: Qi Zheng <zhengqi.arch@bytedance.com>
Reset pn->orig_objcg to NULL to prevent obj_cgroup_put() from being called agagin in __mem_cgroup_free().
Reported-by: Usama Arif <usama.arif@linux.dev> Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> --- mm/memcontrol.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 992a3f5caa62b..ad32639ea5959 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4140,8 +4140,14 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css) for_each_node(nid) { struct mem_cgroup_per_node *pn = memcg->nodeinfo[nid]; - if (pn && pn->orig_objcg) + if (pn && pn->orig_objcg) { obj_cgroup_put(pn->orig_objcg); + /* + * Reset pn->orig_objcg to NULL to prevent obj_cgroup_put() + * from being called agagin in __mem_cgroup_free(). + */ + pn->orig_objcg = NULL; + } } free_shrinker_info(memcg); offline_kmem: -- 2.20.1
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