From nobody Tue Oct 7 00:32:45 2025 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 65A7728C5AD; Wed, 16 Jul 2025 07:14:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.61.82.184 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752650103; cv=none; b=NKD9cTbvRPcEc73tFiscm7cjI1GIf0BIvNk9xlytXOwQc/J2BvDN4CRKTAWjLGxVjbfV45WNeTnr43lp42B2L2dpBemTDz+XGWc+MEKecJWtKNEirrPRMZB/z8lnVsIGSCt7PAZxBKrfUps4/PFIAdLkZybvMPcfXqGe7FIY3/M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752650103; c=relaxed/simple; bh=d1QKs8syhGjdPEm3qcMFjfrdx9xlptYnX9Wk243Jkr0=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=AnRTmJ2M/HYCDVZiT790o6vURZgzzoPY201NrpFxtTvCPIqFMkq8Vx15SLXjVm6F3Bg7Yu2+hLXCrGUOO3XrteYPBQkYFxzU+Ttj80iUE1hx0/6oO+Jg6Ib5iaC8JQB3Ff4PTtSE6MAcULXVL4ZT5q4hripQN5Gkh6z5S/KLM8c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=Cw/LudKl; arc=none smtp.client-ip=210.61.82.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="Cw/LudKl" X-UUID: 9232cdb4621411f0b33aeb1e7f16c2b6-20250716 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=dkQUz9omaIloVa64s9phQV1SIkeACbbWCC29GfBqFac=; b=Cw/LudKlLnF9vTEv74+HzBJ5areiOSp4/QJH6cY+VTjGzID2xm5IGIM6qtSB1p+f3oPBSTshv1Hc+YBrA1TPh/8S6T8KhnG56U9dwHFGWnPAznPIetdynDjSLE1QJsjbcxeSeL59BwS8DCQ09154yji5dSZPuYm1CZrsotH0u4c=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.2,REQID:886ee3bc-1b33-4e66-892c-09134a7b22ab,IP:0,UR L:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-25 X-CID-META: VersionHash:9eb4ff7,CLOUDID:1e0942d8-b768-4ffb-8a44-cd8427608ba6,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0|50,EDM:-3,IP:ni l,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES :1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 9232cdb4621411f0b33aeb1e7f16c2b6-20250716 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 677742633; Wed, 16 Jul 2025 15:14:54 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs13n1.mediatek.inc (172.21.101.193) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.39; Wed, 16 Jul 2025 15:14:51 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1258.39 via Frontend Transport; Wed, 16 Jul 2025 15:14:51 +0800 From: Irui Wang To: Hans Verkuil , Mauro Carvalho Chehab , Matthias Brugger , , CC: , , , , , Yunfei Dong , Longfei Wang , Irui Wang Subject: [PATCH v2] media: mediatek: encoder: Fix uninitialized scalar variable issue Date: Wed, 16 Jul 2025 15:14:50 +0800 Message-ID: <20250716071450.8214-1-irui.wang@mediatek.com> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-MTK: N Content-Type: text/plain; charset="utf-8" UNINIT checker finds some instances of variables that are used without being initialized, for example using the uninitialized value enc_result.is_key_frm can result in unpredictable behavior, so initialize these variables after declaring. Fixes: 4e855a6efa54 ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Enc= oder Driver") Signed-off-by: Irui Wang --- v2: - Add Fixes tag, update commit message - Remove unnecessary memset - Move memset to before the first usage --- .../media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.= c b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c index a01dc25a7699..3065f3e66336 100644 --- a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c +++ b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c @@ -865,7 +865,7 @@ static void vb2ops_venc_buf_queue(struct vb2_buffer *vb) static int vb2ops_venc_start_streaming(struct vb2_queue *q, unsigned int c= ount) { struct mtk_vcodec_enc_ctx *ctx =3D vb2_get_drv_priv(q); - struct venc_enc_param param; + struct venc_enc_param param =3D { 0 }; int ret; int i; =20 @@ -1036,6 +1036,7 @@ static int mtk_venc_encode_header(void *priv) ctx->id, dst_buf->vb2_buf.index, bs_buf.va, (u64)bs_buf.dma_addr, bs_buf.size); =20 + memset(&enc_result, 0, sizeof(enc_result)); ret =3D venc_if_encode(ctx, VENC_START_OPT_ENCODE_SEQUENCE_HEADER, NULL, &bs_buf, &enc_result); @@ -1185,6 +1186,7 @@ static void mtk_venc_worker(struct work_struct *work) (u64)frm_buf.fb_addr[1].dma_addr, frm_buf.fb_addr[1].size, (u64)frm_buf.fb_addr[2].dma_addr, frm_buf.fb_addr[2].size); =20 + memset(&enc_result, 0, sizeof(enc_result)); ret =3D venc_if_encode(ctx, VENC_START_OPT_ENCODE_FRAME, &frm_buf, &bs_buf, &enc_result); =20 --=20 2.46.0