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 94E6A52F9E; Fri, 15 Nov 2024 07:00:47 +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=1731654047; cv=none; b=hI8thuQ3OPY57o2FNaKmU7302hV0HyyD4i1SHhzal8SNahBfaTcKhLgNQWveCrjIOo8EgW+Rnu8vUbrixPybxr6WOkFVMmJFooCyUKMQ6n5pvzkgy7MIfTDGI8JtOB/mGdFQcxnzUYp1F2fOXAXWwkL4hCHXsZcsP322Sdv2kCM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731654047; c=relaxed/simple; bh=9VX4fUmCyqlcA4Ea0lVieasOomNLqmCUG66SLSAwTpM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VZmPTz2RVAs7euCZp2kWXT8WMxELDGedfgNoqkT+arELY5+9ttpRiMNjvViN3Sm65M0aFrfEd3QJz0VkoXA2WIX/eNiTaBOn1IK1B4lsd8sxnRP67uCgRlBcRPjSvvXcM1ost+iH5nEFSdCVJlfgl9J9Qlnxa2TXo5XtpifBBS0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=USmekDv4; 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="USmekDv4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B273EC4CECF; Fri, 15 Nov 2024 07:00:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1731654047; bh=9VX4fUmCyqlcA4Ea0lVieasOomNLqmCUG66SLSAwTpM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=USmekDv4Z1+kQ9X7EVmYpaGM3bIhWVCvPdMH24hjjl8+Bs/m38DkdSidd++OZJTXa 4B14Yan8AQI6+8bAcvXChwFMjv6kN4eho6PGFZuqXrqLtYDT04QqrogcVH5TBvfRuH 0ZMfLI5zBZsoC80ghOBEOTRUTtTNcVFgPOnbsHLM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ian Forbes , Zack Rusin , Martin Krastev , Sasha Levin Subject: [PATCH 5.15 09/22] drm/vmwgfx: Limit display layout ioctl array size to VMWGFX_NUM_DISPLAY_UNITS Date: Fri, 15 Nov 2024 07:38:55 +0100 Message-ID: <20241115063721.511159187@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241115063721.172791419@linuxfoundation.org> References: <20241115063721.172791419@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ian Forbes [ Upstream commit 28a5dfd4f615539fb22fb6d5c219c199c14e6eb6 ] Currently the array size is only limited by the largest kmalloc size which is incorrect. This change will also return a more specific error message than ENOMEM to userspace. Signed-off-by: Ian Forbes Reviewed-by: Zack Rusin Reviewed-by: Martin Krastev Signed-off-by: Zack Rusin Link: https://patchwork.freedesktop.org/patch/msgid/20240808200634.1074083-1-ian.forbes@broadcom.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 4 ++-- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 4 +++- drivers/gpu/drm/vmwgfx/vmwgfx_kms.h | 3 --- 3 files changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index 7bb7a69321d30..9c60bb2aefe1f 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -59,7 +59,7 @@ #define VMWGFX_DRIVER_MINOR 19 #define VMWGFX_DRIVER_PATCHLEVEL 0 #define VMWGFX_FIFO_STATIC_SIZE (1024*1024) -#define VMWGFX_MAX_DISPLAYS 16 +#define VMWGFX_NUM_DISPLAY_UNITS 8 #define VMWGFX_CMD_BOUNCE_INIT_SIZE 32768 #define VMWGFX_PCI_ID_SVGA2 0x0405 @@ -71,7 +71,7 @@ #define VMWGFX_NUM_GB_CONTEXT 256 #define VMWGFX_NUM_GB_SHADER 20000 #define VMWGFX_NUM_GB_SURFACE 32768 -#define VMWGFX_NUM_GB_SCREEN_TARGET VMWGFX_MAX_DISPLAYS +#define VMWGFX_NUM_GB_SCREEN_TARGET VMWGFX_NUM_DISPLAY_UNITS #define VMWGFX_NUM_DXCONTEXT 256 #define VMWGFX_NUM_DXQUERY 512 #define VMWGFX_NUM_MOB (VMWGFX_NUM_GB_CONTEXT +\ diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 23010d60edfe4..8a9b61920496a 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -2295,7 +2295,7 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, struct drm_mode_config *mode_config = &dev->mode_config; struct drm_vmw_update_layout_arg *arg = (struct drm_vmw_update_layout_arg *)data; - void __user *user_rects; + const void __user *user_rects; struct drm_vmw_rect *rects; struct drm_rect *drm_rects; unsigned rects_size; @@ -2308,6 +2308,8 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, def_rect.x2, def_rect.y2); vmw_du_update_layout(dev_priv, 1, &def_rect); return 0; + } else if (arg->num_outputs > VMWGFX_NUM_DISPLAY_UNITS) { + return -E2BIG; } rects_size = arg->num_outputs * sizeof(struct drm_vmw_rect); diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h index 23c2dc943caf0..85595d0bcfcec 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h @@ -198,9 +198,6 @@ struct vmw_kms_dirty { s32 unit_y2; }; -#define VMWGFX_NUM_DISPLAY_UNITS 8 - - #define vmw_framebuffer_to_vfb(x) \ container_of(x, struct vmw_framebuffer, base) #define vmw_framebuffer_to_vfbs(x) \ -- 2.43.0