From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BEE02C3DA79 for ; Sun, 18 Dec 2022 16:09:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D3EC410E230; Sun, 18 Dec 2022 16:09:23 +0000 (UTC) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2272E10E230; Sun, 18 Dec 2022 16:09:20 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9DA2D60DD0; Sun, 18 Dec 2022 16:09:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EF9CDC433EF; Sun, 18 Dec 2022 16:09:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1671379759; bh=6nYTkxlby+DRi1O8DjM51QkGP8OAhwhGRwgpfg5K5Gw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bt5HUlDNVKCYzkl//SBsmg6di7zXs1wuW9TCCR647Q4Vf3EfP/xzyTe2L0PtXSY3w xgPRAQNVBMdI8kNRBbsXafYhVJAbGBKTGNAVTYrM11wc0FW+Ws1UhhyjmEHUj4gfXE iQ+StW99LD2lvJ8faHnl4qhvD3HeG+Ddb6VD1LaEL2aK+rysL8mja8GOKTFKDRNotZ TtHX/kjxIVPeUpTVJQqGrBGNMvgmnwOdQNA9Re1kC52n8BUiPr4Zrh7ppJtpEn65j7 UHE599Lpp+ZisRizbGC/qsf9X+HGK9sKL2qLMe2U5EGINmX3K6iiEjjY66Eg/M+hql 9Sx6WmW5q7RKA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 6.0 26/73] drm/amdgpu: Fix type of second parameter in trans_msg() callback Date: Sun, 18 Dec 2022 11:06:54 -0500 Message-Id: <20221218160741.927862-26-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221218160741.927862-1-sashal@kernel.org> References: <20221218160741.927862-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , llvm@lists.linux.dev, lijo.lazar@amd.com, Kees Cook , dri-devel@lists.freedesktop.org, horace.chen@amd.com, Xinhui.Pan@amd.com, ndesaulniers@google.com, amd-gfx@lists.freedesktop.org, Nathan Chancellor , Victor.Zhao@amd.com, danijel.slivka@amd.com, Sami Tolvanen , Alex Deucher , daniel@ffwll.ch, victor.skvortsov@amd.com, airlied@gmail.com, christian.koenig@amd.com, Hawking.Zhang@amd.com Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Nathan Chancellor [ Upstream commit f0d0f1087333714ee683cc134a95afe331d7ddd9 ] With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. A proposed warning in clang aims to catch these at compile time, which reveals: drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c:412:15: error: incompatible function pointer types initializing 'void (*)(struct amdgpu_device *, u32, u32, u32, u32)' (aka 'void (*)(struct amdgpu_device *, unsigned int, unsigned int, unsigned int, unsigned int)') with an expression of type 'void (struct amdgpu_device *, enum idh_request, u32, u32, u32)' (aka 'void (struct amdgpu_device *, enum idh_request, unsigned int, unsigned int, unsigned int)') [-Werror,-Wincompatible-function-pointer-types-strict] .trans_msg = xgpu_ai_mailbox_trans_msg, ^~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c:435:15: error: incompatible function pointer types initializing 'void (*)(struct amdgpu_device *, u32, u32, u32, u32)' (aka 'void (*)(struct amdgpu_device *, unsigned int, unsigned int, unsigned int, unsigned int)') with an expression of type 'void (struct amdgpu_device *, enum idh_request, u32, u32, u32)' (aka 'void (struct amdgpu_device *, enum idh_request, unsigned int, unsigned int, unsigned int)') [-Werror,-Wincompatible-function-pointer-types-strict] .trans_msg = xgpu_nv_mailbox_trans_msg, ^~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. The type of the second parameter in the prototype should be 'enum idh_request' instead of 'u32'. Update it to clear up the warnings. Link: https://github.com/ClangBuiltLinux/linux/issues/1750 Reported-by: Sami Tolvanen Reviewed-by: Kees Cook Signed-off-by: Nathan Chancellor Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h index 617d072275eb..77210fd64a2b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h @@ -75,6 +75,8 @@ struct amdgpu_vf_error_buffer { uint64_t data[AMDGPU_VF_ERROR_ENTRY_SIZE]; }; +enum idh_request; + /** * struct amdgpu_virt_ops - amdgpu device virt operations */ @@ -84,7 +86,8 @@ struct amdgpu_virt_ops { int (*req_init_data)(struct amdgpu_device *adev); int (*reset_gpu)(struct amdgpu_device *adev); int (*wait_reset)(struct amdgpu_device *adev); - void (*trans_msg)(struct amdgpu_device *adev, u32 req, u32 data1, u32 data2, u32 data3); + void (*trans_msg)(struct amdgpu_device *adev, enum idh_request req, + u32 data1, u32 data2, u32 data3); }; /* -- 2.35.1