From e34d657fc56855eca8c68c0ead3ca4feac5f34dc Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 9 Feb 2021 23:47:49 -0500 Subject: openpromfs: don't do unlock_new_inode() until the new inode is set up Signed-off-by: Al Viro --- fs/openpromfs/inode.c | 67 +++++++++++++++++++++++++-------------------------- 1 file changed, 33 insertions(+), 34 deletions(-) (limited to 'fs/openpromfs/inode.c') diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index 40c8c2e32fa3..f825176ff4ed 100644 --- a/fs/openpromfs/inode.c +++ b/fs/openpromfs/inode.c @@ -236,27 +236,31 @@ found: mutex_unlock(&op_mutex); if (IS_ERR(inode)) return ERR_CAST(inode); - ent_oi = OP_I(inode); - ent_oi->type = ent_type; - ent_oi->u = ent_data; - - switch (ent_type) { - case op_inode_node: - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; - inode->i_op = &openprom_inode_operations; - inode->i_fop = &openprom_operations; - set_nlink(inode, 2); - break; - case op_inode_prop: - if (of_node_name_eq(dp, "options") && (len == 17) && - !strncmp (name, "security-password", 17)) - inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR; - else - inode->i_mode = S_IFREG | S_IRUGO; - inode->i_fop = &openpromfs_prop_ops; - set_nlink(inode, 1); - inode->i_size = ent_oi->u.prop->length; - break; + if (inode->i_state & I_NEW) { + inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); + ent_oi = OP_I(inode); + ent_oi->type = ent_type; + ent_oi->u = ent_data; + + switch (ent_type) { + case op_inode_node: + inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; + inode->i_op = &openprom_inode_operations; + inode->i_fop = &openprom_operations; + set_nlink(inode, 2); + break; + case op_inode_prop: + if (of_node_name_eq(dp, "options") && (len == 17) && + !strncmp (name, "security-password", 17)) + inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR; + else + inode->i_mode = S_IFREG | S_IRUGO; + inode->i_fop = &openpromfs_prop_ops; + set_nlink(inode, 1); + inode->i_size = ent_oi->u.prop->length; + break; + } + unlock_new_inode(inode); } return d_splice_alias(inode, dentry); @@ -345,20 +349,9 @@ static void openprom_free_inode(struct inode *inode) static struct inode *openprom_iget(struct super_block *sb, ino_t ino) { - struct inode *inode; - - inode = iget_locked(sb, ino); + struct inode *inode = iget_locked(sb, ino); if (!inode) - return ERR_PTR(-ENOMEM); - if (inode->i_state & I_NEW) { - inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); - if (inode->i_ino == OPENPROM_ROOT_INO) { - inode->i_op = &openprom_inode_operations; - inode->i_fop = &openprom_operations; - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; - } - unlock_new_inode(inode); - } + inode = ERR_PTR(-ENOMEM); return inode; } @@ -394,9 +387,15 @@ static int openprom_fill_super(struct super_block *s, struct fs_context *fc) goto out_no_root; } + root_inode->i_mtime = root_inode->i_atime = + root_inode->i_ctime = current_time(root_inode); + root_inode->i_op = &openprom_inode_operations; + root_inode->i_fop = &openprom_operations; + root_inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; oi = OP_I(root_inode); oi->type = op_inode_node; oi->u.node = of_find_node_by_path("/"); + unlock_new_inode(root_inode); s->s_root = d_make_root(root_inode); if (!s->s_root) -- cgit v1.2.3