From 52e3450f574f06a291a7e52efeb2597105bd6b88 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Tue, 3 Sep 2024 15:11:18 +0100
Subject: [PATCH] cifs: Fix zero_point init on inode initialisation

BugLink: https://bugs.launchpad.net/bugs/2085849

[ Upstream commit 517b58c1f9242a6b4ac9443d95569dee58bf6b8b ]

Fix cifs_fattr_to_inode() such that the ->zero_point tracking variable
is initialised when the inode is initialised.

Fixes: 3ee1a1fc3981 ("cifs: Cut over to using netfslib")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
---
 fs/smb/client/inode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index f76d90612ed1..464e3ecfa2ab 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -159,6 +159,8 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr,
 		CIFS_I(inode)->time = 0; /* force reval */
 		return -ESTALE;
 	}
+	if (inode->i_state & I_NEW)
+		CIFS_I(inode)->netfs.zero_point = fattr->cf_eof;
 
 	cifs_revalidate_cache(inode, fattr);