Patch "cifs: Fix FALLOC_FL_INSERT_RANGE by setting i_size after EOF moved" has been added to the 6.6-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    cifs: Fix FALLOC_FL_INSERT_RANGE by setting i_size after EOF moved

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     cifs-fix-falloc_fl_insert_range-by-setting-i_size-after-eof-moved.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


From 88010155f02b2c3b03c71609ba6ceeb457ece095 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Wed, 29 Nov 2023 16:56:18 +0000
Subject: cifs: Fix FALLOC_FL_INSERT_RANGE by setting i_size after EOF moved

From: David Howells <dhowells@redhat.com>

commit 88010155f02b2c3b03c71609ba6ceeb457ece095 upstream.

Fix the cifs filesystem implementations of FALLOC_FL_INSERT_RANGE, in
smb3_insert_range(), to set i_size after extending the file on the server
and before we do the copy to open the gap (as we don't clean up the EOF
marker if the copy fails).

Fixes: 7fe6fe95b936 ("cifs: add FALLOC_FL_INSERT_RANGE support")
Cc: stable@vger.kernel.org
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Paulo Alcantara <pc@manguebit.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/smb/client/smb2ops.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -3739,6 +3739,9 @@ static long smb3_insert_range(struct fil
 	if (rc < 0)
 		goto out_2;
 
+	truncate_setsize(inode, old_eof + len);
+	fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
+
 	rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
 	if (rc < 0)
 		goto out_2;


Patches currently in stable-queue which might be from dhowells@redhat.com are

queue-6.6/cifs-fix-falloc_fl_zero_range-by-setting-i_size-if-eof-moved.patch
queue-6.6/cifs-fix-falloc_fl_insert_range-by-setting-i_size-after-eof-moved.patch