From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758986Ab3LFOWv (ORCPT ); Fri, 6 Dec 2013 09:22:51 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:43586 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757973Ab3LFM7u (ORCPT ); Fri, 6 Dec 2013 07:59:50 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Alex Deucher , Luis Henriques Subject: [PATCH 3.11 016/272] drm/radeon/vm: don't attempt to update ptes if ib allocation fails Date: Fri, 6 Dec 2013 12:55:05 +0000 Message-Id: <1386334761-25517-17-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1386334761-25517-1-git-send-email-luis.henriques@canonical.com> References: <1386334761-25517-1-git-send-email-luis.henriques@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Extended-Stable: 3.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.11.10.1 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher commit 4cc948b94a222c310ae089c36718aac7a03aec90 upstream. If we fail to allocate an indirect buffer (ib) when updating the ptes, return an error instead of trying to use the ib. Avoids a null pointer dereference. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=58621 Reviewed-by: Christian König Signed-off-by: Alex Deucher [ luis: backported to 3.11: adjusted context ] Signed-off-by: Luis Henriques --- drivers/gpu/drm/radeon/radeon_gart.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c index b990b1a..3b1de72 100644 --- a/drivers/gpu/drm/radeon/radeon_gart.c +++ b/drivers/gpu/drm/radeon/radeon_gart.c @@ -1156,6 +1156,8 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev, return -ENOMEM; r = radeon_ib_get(rdev, ridx, &ib, NULL, ndw * 4); + if (r) + return r; ib.length_dw = 0; r = radeon_vm_update_pdes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset); -- 1.8.3.2