autofs_lookup(): hold ->d_lock over playing with ->d_flags (5f68056c) · Commits · 戴 / test

fs/autofs/root.c

+7 −6

Original line number	Diff line number	Diff line
		@@ -504,21 +504,22 @@ static struct dentry autofs_lookup(struct inode dir,
		if (!autofs_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))
		return ERR_PTR(-ENOENT);

		/* Mark entries in the root as mount triggers */
		if (IS_ROOT(dentry->d_parent) &&
		autofs_type_indirect(sbi->type))
		__managed_dentry_set_managed(dentry);

		ino = autofs_new_ino(sbi);
		if (!ino)
		return ERR_PTR(-ENOMEM);

		spin_lock(&sbi->lookup_lock);
		spin_lock(&dentry->d_lock);
		/* Mark entries in the root as mount triggers */
		if (IS_ROOT(dentry->d_parent) &&
		autofs_type_indirect(sbi->type))
		__managed_dentry_set_managed(dentry);
		dentry->d_fsdata = ino;
		ino->dentry = dentry;

		spin_lock(&sbi->lookup_lock);
		list_add(&ino->active, &sbi->active_list);
		spin_unlock(&sbi->lookup_lock);
		spin_unlock(&dentry->d_lock);
		}
		return NULL;
		}