Unverified Commit b61ed083 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!10025 9p: add missing locking around taking dentry fid list 

Merge Pull Request from: @ci-robot 
 
PR sync from: Xia Fukun <xiafukun@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/FBW5OBIHERTKXCEW5T3VLIWCWDUZCQ35/ 
 
https://gitee.com/src-openeuler/kernel/issues/IA8AFV 
 
Link:https://gitee.com/openeuler/kernel/pulls/10025

 

Reviewed-by: default avatarZucheng Zheng <zhengzucheng@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents 6b484f45 40fd8358

fs/9p/vfs_dentry.c

+7 −2
Original line number Diff line number Diff line
@@ -48,12 +48,17 @@ static int v9fs_cached_dentry_delete(const struct dentry *dentry) 
static void v9fs_dentry_release(struct dentry *dentry)

{

	struct hlist_node *p, *n;

	struct hlist_head head;



	p9_debug(P9_DEBUG_VFS, " dentry: %pd (%p)\n",

		 dentry, dentry);

	hlist_for_each_safe(p, n, (struct hlist_head *)&dentry->d_fsdata)



	spin_lock(&dentry->d_lock);

	hlist_move_list((struct hlist_head *)&dentry->d_fsdata, &head);

	spin_unlock(&dentry->d_lock);



	hlist_for_each_safe(p, n, &head)

		p9_fid_put(hlist_entry(p, struct p9_fid, dlist));

	dentry->d_fsdata = NULL;

}



static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)