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

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Date:   Mon,  8 Oct 2018 20:32:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, Amir Goldstein <amir73il@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miklos Szeredi <mszeredi@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 4.18 146/168] ovl: set I_CREATING on inode being created

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

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

From: Miklos Szeredi <miklos@...redi.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 <mszeredi@...hat.com>
Fixes: e950564b97fd ("vfs: don't evict uninitialized inode")
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
To: Amir Goldstein <amir73il@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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;