| Message ID | 20230328092608.523933-1-harperchen1110@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: vcodec: Fix potential array out-of-bounds in vb2ops_venc_queue_setup | expand |
Hi Mauro, Hans, On Thu, Jun 15, 2023 at 1:23 AM Tomasz Figa <tfiga@chromium.org> wrote: > > On Tue, Mar 28, 2023 at 6:26 PM Wei Chen <harperchen1110@gmail.com> wrote: > > > > variable *nplanes is provided by user via system call argument. The > > possible value of q_data->fmt->num_planes is 1-3, while the value > > of *nplanes can be 1-8. The array access by index i can cause array > > out-of-bounds. > > > > Fix this bug by checking *nplanes against the array size. > > > > Signed-off-by: Wei Chen <harperchen1110@gmail.com> > > --- > > drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c > > index d65800a3b89d..1ea02f9136f6 100644 > > --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c > > +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c > > @@ -821,6 +821,8 @@ static int vb2ops_venc_queue_setup(struct vb2_queue *vq, > > return -EINVAL; > > > > if (*nplanes) { > > + if (*nplanes != q_data->fmt->num_planes) > > + return -EINVAL; > > for (i = 0; i < *nplanes; i++) > > if (sizes[i] < q_data->sizeimage[i]) > > return -EINVAL; > > -- > > 2.25.1 > > > > Thanks for the patch, it makes sense indeed. > > Reviewed-by: Tomasz Figa <tfiga@chromium.org> Do you plan to pick this patch? Thanks. Best regards, Tomasz
On Tue, Mar 28, 2023 at 09:26:08AM +0000, Wei Chen wrote: > variable *nplanes is provided by user via system call argument. The > possible value of q_data->fmt->num_planes is 1-3, while the value > of *nplanes can be 1-8. The array access by index i can cause array > out-of-bounds. > > Fix this bug by checking *nplanes against the array size. This should have a fixes tag: Fixes: 4e855a6efa54 ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Encoder Driver") And also CC the stable list: Cc: stable@vger.kernel.org > Signed-off-by: Wei Chen <harperchen1110@gmail.com> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> > --- > drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c > index d65800a3b89d..1ea02f9136f6 100644 > --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c > +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c > @@ -821,6 +821,8 @@ static int vb2ops_venc_queue_setup(struct vb2_queue *vq, > return -EINVAL; > > if (*nplanes) { > + if (*nplanes != q_data->fmt->num_planes) > + return -EINVAL; > for (i = 0; i < *nplanes; i++) > if (sizes[i] < q_data->sizeimage[i]) > return -EINVAL; > -- > 2.25.1 >
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c index d65800a3b89d..1ea02f9136f6 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c @@ -821,6 +821,8 @@ static int vb2ops_venc_queue_setup(struct vb2_queue *vq, return -EINVAL; if (*nplanes) { + if (*nplanes != q_data->fmt->num_planes) + return -EINVAL; for (i = 0; i < *nplanes; i++) if (sizes[i] < q_data->sizeimage[i]) return -EINVAL;
variable *nplanes is provided by user via system call argument. The possible value of q_data->fmt->num_planes is 1-3, while the value of *nplanes can be 1-8. The array access by index i can cause array out-of-bounds. Fix this bug by checking *nplanes against the array size. Signed-off-by: Wei Chen <harperchen1110@gmail.com> --- drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c | 2 ++ 1 file changed, 2 insertions(+)