UPSTREAM: zram: do not leak page on writeback_store error path

Ensure the page used for local object data is freed on error out path.

Link: https://lkml.kernel.org/r/20250303022425.285971-19-senozhatsky@chromium.org


Fixes: 330edc2b (zram: rework writeback target selection strategy)
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Kairui Song <ryncsn@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Yosry Ahmed <yosry.ahmed@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit a6d2193b)

Bug: 446676432
Change-Id: I19d2a2d4115b5a94268f4b030e4face6b9fc2d7d
Signed-off-by: David Stevens <stevensd@google.com>