linux-kernel - [PATCH v3 7/7] media: mediatek: vcodec: remove media request checking

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20240613075532.32128-8-yunfei.dong@mediatek.com>
Date: Thu, 13 Jun 2024 15:55:32 +0800
From: Yunfei Dong <yunfei.dong@...iatek.com>
To: Nícolas F . R . A . Prado
	<nfraprado@...labora.com>, Sebastian Fricke <sebastian.fricke@...labora.com>,
	Nicolas Dufresne <nicolas.dufresne@...labora.com>, Hans Verkuil
	<hverkuil-cisco@...all.nl>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Benjamin Gaignard
	<benjamin.gaignard@...labora.com>, Nathan Hebert <nhebert@...omium.org>,
	Daniel Almeida <daniel.almeida@...labora.com>
CC: Hsin-Yi Wang <hsinyi@...omium.org>, Fritz Koenig <frkoenig@...omium.org>,
	Daniel Vetter <daniel@...ll.ch>, Steve Cho <stevecho@...omium.org>, Yunfei
 Dong <yunfei.dong@...iatek.com>, <linux-media@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v3 7/7] media: mediatek: vcodec: remove media request checking

If the media request of each source buffer is NULL, need to
set the buffer status to error, then schedule again in case
of access NULL pointer. No need to check again after media
request pointer is non zero.

Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
---
 .../vcodec/decoder/mtk_vcodec_dec_stateless.c      | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
index 3dba3549000a..43af18df03ea 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
@@ -359,10 +359,14 @@ static void mtk_vdec_worker(struct work_struct *work)
 			  ctx->id, bs_src->va, &bs_src->dma_addr, bs_src->size, vb2_src);
 	/* Apply request controls. */
 	src_buf_req = vb2_src->req_obj.req;
-	if (src_buf_req)
+	if (src_buf_req) {
 		v4l2_ctrl_request_setup(src_buf_req, &ctx->ctrl_hdl);
-	else
+	} else {
 		mtk_v4l2_vdec_err(ctx, "vb2 buffer media request is NULL");
+		v4l2_m2m_buf_done(vb2_v4l2_src, VB2_BUF_STATE_ERROR);
+		v4l2_m2m_job_finish(dev->m2m_dev_dec, ctx->m2m_ctx);
+		return;
+	}
 
 	ret = vdec_if_decode(ctx, bs_src, NULL, &res_chg);
 	if (ret && ret != -EAGAIN) {
@@ -380,8 +384,7 @@ static void mtk_vdec_worker(struct work_struct *work)
 	state = ret ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE;
 	if (!IS_VDEC_LAT_ARCH(dev->vdec_pdata->hw_arch) ||
 	    ctx->current_codec == V4L2_PIX_FMT_VP8_FRAME) {
-		if (src_buf_req)
-			v4l2_ctrl_request_complete(src_buf_req, &ctx->ctrl_hdl);
+		v4l2_ctrl_request_complete(src_buf_req, &ctx->ctrl_hdl);
 		vb2_v4l2_dst = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
 		v4l2_m2m_buf_done(vb2_v4l2_dst, state);
 		v4l2_m2m_buf_done(vb2_v4l2_src, state);
@@ -398,8 +401,7 @@ static void mtk_vdec_worker(struct work_struct *work)
 	 */
 	ctx->last_vb2_v4l2_src = (ret != -EAGAIN) ? NULL : vb2_v4l2_src;
 	if (ret && ret != -EAGAIN) {
-		if (src_buf_req)
-			v4l2_ctrl_request_complete(src_buf_req, &ctx->ctrl_hdl);
+		v4l2_ctrl_request_complete(src_buf_req, &ctx->ctrl_hdl);
 		v4l2_m2m_buf_done(vb2_v4l2_src, state);
 	}
 
-- 
2.18.0