On 06/11/2023 15:48, Zheng Wang wrote:

Hello,

This v2 series fixes the use-after-free bug in mtk_jpeg_dec_device_run.
This patch fixes the security bug in chrome-os.
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(-)

Please don't resend. If it is in patchwork.linuxtv.org then it is good.
Fixes (unless they fix something really nasty) can take several weeks before
they are picked up. I usually schedule 2 or 3 rounds per kernel cycle where
I go through all the pending patches with fixes.

Regards,

	Hans

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