From: Cunlong Li <shenxiaogll@gmail.com>
To: Minchan Kim <minchan@kernel.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Jens Axboe <axboe@kernel.dk>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>,
linux-block@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Cunlong Li <shenxiaogll@gmail.com>,
stable@vger.kernel.org
Subject: [PATCH v2 0/2] zram: fix UAF in zram_bvec_write_partial() and drop dead bio plumbing
Date: Wed, 27 May 2026 12:49:23 +0800 [thread overview]
Message-ID: <20260527-zram-v2-0-2fb84b054b5c@gmail.com> (raw)
Patch 1 fixes a use-after-free in zram_bvec_write_partial() that
happens on PAGE_SIZE > 4K configurations when a partial write hits a
ZRAM_WB slot.
Patch 2 is a follow-up cleanup that drops the now-unused bio parameter
from zram_bvec_write_partial() and zram_bvec_write(), no functional
change.
Patch 1 is tagged for stable; patch 2 is not.
Signed-off-by: Cunlong Li <shenxiaogll@gmail.com>
---
Changes in v2:
- Add patch 2: drop the now-unused bio parameter from
zram_bvec_write_partial() and zram_bvec_write(), per Sergey's
suggestion on v1.
- Link to v1: https://lore.kernel.org/r/20260527-zram-v1-1-ce1acb2bfaf9@gmail.com
---
Cunlong Li (2):
zram: fix use-after-free in zram_bvec_write_partial()
zram: drop unused bio parameter from write helpers
drivers/block/zram/zram_drv.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
---
base-commit: e8c2f9fdadee7cbc75134dc463c1e0d856d6e5c7
change-id: 20260526-zram-b01425b7e6c6
Best regards,
--
Cunlong Li <shenxiaogll@gmail.com>
next reply other threads:[~2026-05-27 4:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-27 4:49 Cunlong Li [this message]
2026-05-27 4:49 ` [PATCH v2 1/2] zram: fix use-after-free in zram_bvec_write_partial() Cunlong Li
2026-05-27 7:24 ` Christoph Hellwig
2026-05-27 14:13 ` Cunlong Li
2026-05-27 4:49 ` [PATCH v2 2/2] zram: drop unused bio parameter from write helpers Cunlong Li
2026-05-27 7:24 ` Christoph Hellwig
2026-05-27 7:21 ` [PATCH v2 0/2] zram: fix UAF in zram_bvec_write_partial() and drop dead bio plumbing Sergey Senozhatsky
2026-05-27 14:15 ` Cunlong Li
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