Unverified Commit a0eb0795 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!11559 mm/ksm: fix possible UAF of stable_node 

Merge Pull Request from: @ci-robot 
 
PR sync from: Kaixiong Yu <yukaixiong@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/WBVM33OQGLGWFT7DFS2LBY5LDEF7FO4X/ 
 
https://gitee.com/openeuler/kernel/issues/IARBRI 
 
Link:https://gitee.com/openeuler/kernel/pulls/11559

 

Reviewed-by: default avatarZhang Peng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents 2d913a6e 0243ae55

mm/ksm.c

+2 −1
Original line number Diff line number Diff line
@@ -1965,7 +1965,6 @@ static struct ksm_stable_node *stable_tree_insert(struct page *kpage) 


	INIT_HLIST_HEAD(&stable_node_dup->hlist);

	stable_node_dup->kpfn = kpfn;

	set_page_stable_node(kpage, stable_node_dup);

	stable_node_dup->rmap_hlist_len = 0;

	DO_NUMA(stable_node_dup->nid = nid);

	if (!need_chain) {
@@ -1984,6 +1983,8 @@ static struct ksm_stable_node *stable_tree_insert(struct page *kpage) 
		stable_node_chain_add_dup(stable_node_dup, stable_node);

	}



	set_page_stable_node(kpage, stable_node_dup);



	return stable_node_dup;

}