Hello All, Please ignore this patch, sent by mistake. Sorry for spamming. On 4/5/2024 9:21 PM, Dikshita Agarwal wrote: > There appears to be a possible use after free with vdec_close(). > The firmware will add buffer release work to the work queue through > HFI callbacks as a normal part of decoding. Randomly closing the > decoder device from userspace during normal decoding can incur > a read after free for inst. > > Fix it by cancelling the delayed work in vdec_close. > > Signed-off-by: Dikshita Agarwal <quic_dikshita@xxxxxxxxxxx> > --- > drivers/media/platform/qcom/venus/vdec.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c > index 29130a9..8dda46a 100644 > --- a/drivers/media/platform/qcom/venus/vdec.c > +++ b/drivers/media/platform/qcom/venus/vdec.c > @@ -1747,6 +1747,7 @@ static int vdec_close(struct file *file) > > vdec_pm_get(inst); > > + cancel_delayed_work_sync(&inst->delayed_process_work); > v4l2_m2m_ctx_release(inst->m2m_ctx); > v4l2_m2m_release(inst->m2m_dev); > vdec_ctrl_deinit(inst);
