Re: [RESEND PATCH v2 0/3] Fix use-after-free bug in mtk_jpeg_dec_device_run and fix schedule error in mtk_jpegdec_worker

[Hans Verkuil]

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