The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 88010155f02b2c3b03c71609ba6ceeb457ece095 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023120354-regulate-encourage-cb36@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

88010155f02b ("cifs: Fix FALLOC_FL_INSERT_RANGE by setting i_size after EOF moved")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

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: [PATCH] cifs: Fix FALLOC_FL_INSERT_RANGE by setting i_size after EOF moved

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

diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index f1b0b2b11ab2..45931115f475 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -3745,6 +3745,9 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 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;