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 CCB5A1DE8BE; Tue, 8 Oct 2024 13:18:33 +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=1728393513; cv=none; b=txKlQdcy6nzpbTmI9CbhBhlWqHmiy5fv/FXIJ7M5NjNu9z95pA+Q/5V3MdJkHaev1fA5pYHJQf7hQz/8h5sR1ChicVDaeXhOx9UGXzL+dSLonAprr8Il+d7dbcSfnIgFhfpCqGRcWBuO/ySrBj2ebGi93jEHji9N4xuFbYLQ4es= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728393513; c=relaxed/simple; bh=CY6UiXK5M6WjO+EnDSF6KZ0InQdpydP4x4XDCvIQYn8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Sa2xh39MU78mHgXhJSqF5LF68+lScEa3E7g6/n5VBVJGiG6RrIDrtGpPKc2HfCjH6IVzETpE56efjdMzP2m3h5yZXKZlTEon2hbqApOIlrgshRugATQ0MJsTz7T9wwPGLgW4ir7qCLP7P+sChKL8fUSlfkgIWqP/kY7B9a2mGkc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=qQ/ABVwA; 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="qQ/ABVwA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E19BC4CEC7; Tue, 8 Oct 2024 13:18:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728393513; bh=CY6UiXK5M6WjO+EnDSF6KZ0InQdpydP4x4XDCvIQYn8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qQ/ABVwANsLKP9CsrbT+Q9wovQLyULq+mONrUHCFvJaX3r938p+ZwU4zx473YsYdo 7a4mkNzxq3463E1nA85ajhPcU3YI5OMBNlxJF0h3wpMuXYvol4Wxo5P5fage7Knx44 cT8NuZrmp5JhPaNIzmWW5yyYpMhud4qB4UOT/Dic= 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 6.6 157/386] drm/amd/display: Fix index out of bounds in degamma hardware format translation Date: Tue, 8 Oct 2024 14:06:42 +0200 Message-ID: <20241008115635.603979482@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: patches@lists.linux.dev 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 b7e99058eb2e86aabd7a10761e76cae33d22b49f ] Fixes index out of bounds issue in `cm_helper_translate_curve_to_degamma_hw_format` function. 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/dcn10/dcn10_cm_common.c:594 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.red' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:595 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.green' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:596 cm_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/dcn10/dcn10_cm_common.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c index c0372aa4ec838..684e30f9cf898 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c @@ -571,6 +571,8 @@ bool cm_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