linux-kernel - [PATCH] OOB read and write in mtk multiple places

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Date:   Tue, 27 Jun 2023 16:10:02 +0800
From:   yqsun1997@...il.com
To:     tiffany.lin@...iatek.com
Cc:     andrew-ct.chen@...iatek.com, yunfei.dong@...iatek.com,
        matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, 499671216@...com,
        yqsun1997 <yqsun1997@...il.com>
Subject: [PATCH] OOB read and write in mtk multiple places

From: yqsun1997 <yqsun1997@...il.com>

The num_planes max index is 8,
but bytesperline and bytesperline in struct mtk_q_data,
The max index is MTK_VCODEC_MAX_PLANES == 3,
so will cause OOB read and write in multiple places.like vidioc_venc_g_fmt
same as commit 8fbcf730

Signed-off-by: yqsun1997 <yqsun1997@...il.com>
---
 drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
index 9acab54fd..c2c157675 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
@@ -22,7 +22,7 @@
 #define MTK_VCODEC_DEC_NAME	"mtk-vcodec-dec"
 #define MTK_VCODEC_ENC_NAME	"mtk-vcodec-enc"
 
-#define MTK_VCODEC_MAX_PLANES	3
+#define MTK_VCODEC_MAX_PLANES	8
 #define MTK_V4L2_BENCHMARK	0
 #define WAIT_INTR_TIMEOUT_MS	1000
 #define IS_VDEC_LAT_ARCH(hw_arch) ((hw_arch) >= MTK_VDEC_LAT_SINGLE_CORE)
-- 
2.39.2