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 C1F3C1DEFCE; Tue, 8 Oct 2024 13:17:56 +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=1728393476; cv=none; b=kV8JkzwM2e7jDYNdmb8CBeZtEJuBKOKMh32dbGOsge3oQpFRtDNZZvLWyr0dhyIWCG0tYT4vJzLggE6g3iW1KhG6Syd78w11/qv3VYOBiBdIRjZthgQtvUC6xjHYmqSlcRZWzttZOx113fKZ3kXBiLH7JaYHOhupJSz1qCVFWmo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728393476; c=relaxed/simple; bh=BwW18ttrt2DrD++7UQhYNkwWfyAhvlNm4BEwXMmHic8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SlJoHBvE4L0PKZfWhoXwWBhIOoQBK9+Lcsnv1UlyyZaS+TIjTmnkXqEc8efT5UO57miFh1arimQpPxBvIAHl0aqvdSAuzxyjr3uJTpvxdI4kSiYqO6zcfX/M8WlxTbfEBYhi/us5qOrKSChZ6sxs1JBFMthIo/8EkYH2sN8z0zs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=irJthOYb; 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="irJthOYb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B65DEC4CEC7; Tue, 8 Oct 2024 13:17:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728393476; bh=BwW18ttrt2DrD++7UQhYNkwWfyAhvlNm4BEwXMmHic8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=irJthOYbdEXiFyt0OozPsyTY59MRX+LtuPtmQr7Bkdiw0acpPN5s8V7/goKtsNMt3 D/QToMIWV5tSE1YUnFz7OgHGSw1JaoGeQ/q9EABOyCU0iplHQ4p5Mak0GucayRdQ1q wE+7b3Uc/gxbfu5Rh34aFbZJMISljuYZkBKexAS8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tom Chung , Rodrigo Siqueira , Roman Li , Alex Hung , Aurabindo Pillai , Harry Wentland , Hamza Mahfooz , Srinivasan Shanmugam , Alex Deucher , Sasha Levin Subject: [PATCH 6.6 156/386] drm/amd/display: Fix index out of bounds in DCN30 degamma hardware format translation Date: Tue, 8 Oct 2024 14:06:41 +0200 Message-ID: <20241008115635.565112674@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: Srinivasan Shanmugam [ Upstream commit bc50b614d59990747dd5aeced9ec22f9258991ff ] This commit addresses a potential index out of bounds issue in the `cm3_helper_translate_curve_to_degamma_hw_format` function in the DCN30 color management module. The issue could occur when the index 'i' exceeds the number of transfer function points (TRANSFER_FUNC_POINTS). The fix adds a check to ensure 'i' is within bounds before accessing the transfer function points. If 'i' is out of bounds, the function returns false to indicate an error. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:338 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.red' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:339 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.green' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:340 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.blue' 1025 <= s32max Cc: Tom Chung Cc: Rodrigo Siqueira Cc: Roman Li Cc: Alex Hung Cc: Aurabindo Pillai Cc: Harry Wentland Cc: Hamza Mahfooz Signed-off-by: Srinivasan Shanmugam Reviewed-by: Tom Chung Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c index e0df9b0065f9c..e0b1fc92ed186 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c @@ -355,6 +355,8 @@ bool cm3_helper_translate_curve_to_degamma_hw_format( i += increment) { if (j == hw_points - 1) break; + if (i >= TRANSFER_FUNC_POINTS) + return false; rgb_resulted[j].red = output_tf->tf_pts.red[i]; rgb_resulted[j].green = output_tf->tf_pts.green[i]; rgb_resulted[j].blue = output_tf->tf_pts.blue[i]; -- 2.43.0