The quilt patch titled
Subject: zram: do not leak page on writeback_store error path
has been removed from the -mm tree. Its filename was
zram-do-not-leak-page-on-writeback_store-error-path.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Subject: zram: do not leak page on writeback_store error path
Date: Mon, 3 Mar 2025 11:03:27 +0900
Ensure the page used for local object data is freed on error out path.
Link: https://lkml.kernel.org/r/20250303022425.285971-19-senozhatsky@xxxxxxxxxxxx
Fixes: 330edc2bc059 (zram: rework writeback target selection strategy)
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Hillf Danton <hdanton@xxxxxxxx>
Cc: Kairui Song <ryncsn@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Yosry Ahmed <yosry.ahmed@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/block/zram/zram_drv.c~zram-do-not-leak-page-on-writeback_store-error-path
+++ a/drivers/block/zram/zram_drv.c
@@ -787,7 +787,7 @@ static ssize_t writeback_store(struct de
unsigned long index = 0;
struct bio bio;
struct bio_vec bio_vec;
- struct page *page;
+ struct page *page = NULL;
ssize_t ret = len;
int mode, err;
unsigned long blk_idx = 0;
@@ -929,8 +929,10 @@ next:
if (blk_idx)
free_block_bdev(zram, blk_idx);
- __free_page(page);
+
release_init_lock:
+ if (page)
+ __free_page(page);
release_pp_ctl(zram, ctl);
atomic_set(&zram->pp_in_progress, 0);
up_read(&zram->init_lock);
_
Patches currently in -mm which might be from senozhatsky@xxxxxxxxxxxx are
