From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:55384 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727260AbeJICFS (ORCPT ); Mon, 8 Oct 2018 22:05:18 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Christian=20K=C3=B6nig?= , Andrey Grodzovsky , Alex Deucher , Sasha Levin Subject: [PATCH 4.18 134/168] drm/amdgpu: fix error handling in amdgpu_cs_user_fence_chunk Date: Mon, 8 Oct 2018 20:31:54 +0200 Message-Id: <20181008175625.138805888@linuxfoundation.org> In-Reply-To: <20181008175620.043587728@linuxfoundation.org> References: <20181008175620.043587728@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: "Christian K�nig" [ Upstream commit 0165de983272d1fae0809ed9db47c46a412279bc ] Slowly leaking memory one page at a time :) Signed-off-by: Christian König Reviewed-by: Andrey Grodzovsky Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -38,6 +38,7 @@ static int amdgpu_cs_user_fence_chunk(st { struct drm_gem_object *gobj; unsigned long size; + int r; gobj = drm_gem_object_lookup(p->filp, data->handle); if (gobj == NULL) @@ -49,20 +50,26 @@ static int amdgpu_cs_user_fence_chunk(st p->uf_entry.tv.shared = true; p->uf_entry.user_pages = NULL; - size = amdgpu_bo_size(p->uf_entry.robj); - if (size != PAGE_SIZE || (data->offset + 8) > size) - return -EINVAL; - - *offset = data->offset; - drm_gem_object_put_unlocked(gobj); + size = amdgpu_bo_size(p->uf_entry.robj); + if (size != PAGE_SIZE || (data->offset + 8) > size) { + r = -EINVAL; + goto error_unref; + } + if (amdgpu_ttm_tt_get_usermm(p->uf_entry.robj->tbo.ttm)) { - amdgpu_bo_unref(&p->uf_entry.robj); - return -EINVAL; + r = -EINVAL; + goto error_unref; } + *offset = data->offset; + return 0; + +error_unref: + amdgpu_bo_unref(&p->uf_entry.robj); + return r; } static int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)