[PATCH 4.18 146/168] ovl: set I_CREATING on inode being created

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Miklos Szeredi <mik...@szeredi.hu>

commit 6faf05c2b2b4fe70d9068067437649401531de0a upstream.

...otherwise there will be list corruption due to inode_sb_list_add() being
called for inode already on the sb list.

Signed-off-by: Miklos Szeredi <mszer...@redhat.com>
Fixes: e950564b97fd ("vfs: don't evict uninitialized inode")
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
To: Amir Goldstein <amir7...@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 fs/overlayfs/dir.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -601,6 +601,10 @@ static int ovl_create_object(struct dent
        if (!inode)
                goto out_drop_write;
 
+       spin_lock(&inode->i_lock);
+       inode->i_state |= I_CREATING;
+       spin_unlock(&inode->i_lock);
+
        inode_init_owner(inode, dentry->d_parent->d_inode, mode);
        attr.mode = inode->i_mode;