From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 F3A451DE4CD; Tue, 8 Oct 2024 13:17:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728393449; cv=none; b=EC2gZqTdwYWlRCQO/vztSFyJwnITQIxpC4a7mLnBlAYsHKgbsyltz6sulvmWzOrYB5yI/zrLPbpKix/Cp7TaBG4MBHmEwdKEqSSEIpooBWsfEeb7Z9Uqc8OKmhZlNirSHReDJ12YHbhAeTvIBoBq4HNr6a5NGlPWo3OECpTQ+Xw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728393449; c=relaxed/simple; bh=FbJ+f0yxOlGS/BQOJ3IjMu1nrYkrmBLxMhZWhkW6zrA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HU05L8I2j7EOObj6gDfWWd3mUmBl/fE/1c1XkJDbQrKKPtdSo7o+douhTM2fq4P9CQdbZsbdh/nQqBCZAesywMavZQMFT7Rs+CGt0wLbOhQu3wkU3NC/mDuimss97W3xyp0+mRGW1Z92raDJzQQXkQFf8lFUslfphaP3v4fQW7w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=f6GGxyjN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="f6GGxyjN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 71006C4CEC7; Tue, 8 Oct 2024 13:17:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728393448; bh=FbJ+f0yxOlGS/BQOJ3IjMu1nrYkrmBLxMhZWhkW6zrA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f6GGxyjNLC+FkJKgqg7oT7hKKOKv2t4Xgo3xgTDbY0mdF447lyH8rVQBvQuR25fSC LUVAYePjzNaIRGRMKNEbmOehK2ux15lu5ovxEng5FTwWv5JvsbhEcq9ACYrmH+xvSd /g3+5ZK1hIWig2cxYaIyNLGopMuuIDihyOveoNC8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rodrigo Siqueira , Jerry Zuo , Alex Hung , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 6.6 154/386] drm/amd/display: Check stream before comparing them Date: Tue, 8 Oct 2024 14:06:39 +0200 Message-ID: <20241008115635.486638181@linuxfoundation.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241008115629.309157387@linuxfoundation.org> References: <20241008115629.309157387@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Hung [ Upstream commit 35ff747c86767937ee1e0ca987545b7eed7a0810 ] [WHAT & HOW] amdgpu_dm can pass a null stream to dc_is_stream_unchanged. It is necessary to check for null before dereferencing them. This fixes 1 FORWARD_NULL issue reported by Coverity. Reviewed-by: Rodrigo Siqueira Signed-off-by: Jerry Zuo Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c index 4b34bc9d4e4be..99fcd39bb15e0 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -2154,6 +2154,8 @@ static bool are_stream_backends_same( bool dc_is_stream_unchanged( struct dc_stream_state *old_stream, struct dc_stream_state *stream) { + if (!old_stream || !stream) + return false; if (!are_stream_backends_same(old_stream, stream)) return false; -- 2.43.0