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From:   Zheng Wang <zyytlz.wz@163.com>
To:     dmitry.osipenko@collabora.com
Cc:     Kyrie.Wu@mediatek.com, bin.liu@mediatek.com, mchehab@kernel.org,
        matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, Irui.Wang@mediatek.com,
        security@kernel.org, hackerzheng666@gmail.com,
        1395428693sheep@gmail.com, alex000young@gmail.com,
        amergnat@baylibre.com, wenst@chromium.org,
        Zheng Wang <zyytlz.wz@163.com>
Subject: [PATCH v2 0/3] Fix use-after-free bug in mtk_jpeg_dec_device_run and fix schedule error in mtk_jpegdec_worker
Date:   Tue, 31 Oct 2023 15:24:26 +0800
Message-Id: <20231031072429.21448-1-zyytlz.wz@163.com>
MIME-Version: 1.0
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Hello,

This v2 series fixes the use-after-free bug in mtk_jpeg_dec_device_run.
It inclues reverting the incomplete fix before and make the right fix.
Also,it fixes the error of timeout-worker-schedule in multiple-core
devices.

1. Remove cancel worker in mtk_jpeg_remove for the worker is only
registered in single-core device but we try to cacnel it in both
single-core and multiple-core devices.

2. Fix use-after-free bug by delay the schedule_delayed_work only if
mtk_jpeg_set_dec_dst runs successfully.

3. Delay the schedule_delayed_work in mtk_jpegdec_worker as it has same
code logic in mtk_jpeg_dec_device_run.

version 2 changes

-put the patches into on series suggested by Dmitry

Zheng Wang (3):
  media: mtk-jpeg: Remove cancel worker in mtk_jpeg_remove to avoid the
    crash of multi-core JPEG devices
  media: mtk-jpeg: Fix use after free bug due to error path handling
    in mtk_jpeg_dec_device_run
  media: mtk-jpeg: Fix timeout schedule error in mtk_jpegdec_worker.

 .../media/platform/mediatek/jpeg/mtk_jpeg_core.c    | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

-- 
2.25.1