FAILED: patch "[PATCH] btrfs: fix extent buffer leak after tree mod log failure at" failed to apply to 5.10-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.10-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-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x ede600e497b1461d06d22a7d17703d9096868bc3
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2023071617-easeful-catlike-d302@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

ede600e497b1 ("btrfs: fix extent buffer leak after tree mod log failure at split_node()")

thanks,

greg k-h

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

From ede600e497b1461d06d22a7d17703d9096868bc3 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@suse.com>
Date: Thu, 8 Jun 2023 11:27:38 +0100
Subject: [PATCH] btrfs: fix extent buffer leak after tree mod log failure at
 split_node()

At split_node(), if we fail to log the tree mod log copy operation, we
return without unlocking the split extent buffer we just allocated and
without decrementing the reference we own on it. Fix this by unlocking
it and decrementing the ref count before returning.

Fixes: 5de865eebb83 ("Btrfs: fix tree mod logging")
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 7f7f13965fe9..8496535828de 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -3053,6 +3053,8 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
 
 	ret = btrfs_tree_mod_log_eb_copy(split, c, 0, mid, c_nritems - mid);
 	if (ret) {
+		btrfs_tree_unlock(split);
+		free_extent_buffer(split);
 		btrfs_abort_transaction(trans, ret);
 		return ret;
 	}