Re: FAILED: patch "[PATCH] btrfs: return error pointer from alloc_test_extent_buffer" failed to apply to 4.19-stable tree

[Sasha Levin <sashal@kernel.org>]

On Mon, Dec 23, 2019 at 12:12:39PM -0500, gregkh@linuxfoundation.org wrote:
>
>The patch below does not apply to the 4.19-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>.
>
>thanks,
>
>greg k-h
>
>------------------ original commit in Linus's tree ------------------
>
>From b6293c821ea8fa2a631a2112cd86cd435effeb8b Mon Sep 17 00:00:00 2001
>From: Dan Carpenter <dan.carpenter@oracle.com>
>Date: Tue, 3 Dec 2019 14:24:58 +0300
>Subject: [PATCH] btrfs: return error pointer from alloc_test_extent_buffer
>
>Callers of alloc_test_extent_buffer have not correctly interpreted the
>return value as error pointer, as alloc_test_extent_buffer should behave
>as alloc_extent_buffer. The self-tests were unaffected but
>btrfs_find_create_tree_block could call both functions and that would
>cause problems up in the call chain.
>
>Fixes: faa2dbf004e8 ("Btrfs: add sanity tests for new qgroup accounting code")
>CC: stable@vger.kernel.org # 4.4+
>Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>Reviewed-by: David Sterba <dsterba@suse.com>
>Signed-off-by: David Sterba <dsterba@suse.com>

Few conflicts on the backport mostly due to message formatting (such as
9e3d9f8462ef ("btrfs: tests: use standard error message after extent
buffer allocation failure") ). I've fixed them up and queued for
4.19-4.4.

-- 
Thanks,
Sasha