From patchwork Mon Mar 6 23:54:00 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Auld X-Patchwork-Id: 9607845 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3B874601D2 for ; Mon, 6 Mar 2017 23:54:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 216E128470 for ; Mon, 6 Mar 2017 23:54:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 153E828497; Mon, 6 Mar 2017 23:54:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 13DC828499 for ; Mon, 6 Mar 2017 23:54:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DF4596E570; Mon, 6 Mar 2017 23:54:18 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 01AC06E570 for ; Mon, 6 Mar 2017 23:54:17 +0000 (UTC) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga105.fm.intel.com with ESMTP; 06 Mar 2017 15:54:17 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.35,256,1484035200"; d="scan'208";a="233013054" Received: from abahri-mobl.ger.corp.intel.com (HELO mwahaha.ger.corp.intel.com) ([10.252.2.118]) by fmsmga004.fm.intel.com with ESMTP; 06 Mar 2017 15:54:16 -0800 From: Matthew Auld To: intel-gfx@lists.freedesktop.org Date: Mon, 6 Mar 2017 23:54:00 +0000 Message-Id: <20170306235414.23407-2-matthew.auld@intel.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170306235414.23407-1-matthew.auld@intel.com> References: <20170306235414.23407-1-matthew.auld@intel.com> Subject: [Intel-gfx] [PATCH 01/15] drm/i915/selftests: don't leak the gem object X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP For our fake dma objects we can leak the underlying gem object if we fail to pin our "backing storage". [ 39.952618] ============================================================================= [ 39.952625] BUG mock_object (Tainted: G U ): Objects remaining in mock_object on __kmem_cache_shutdown() [ 39.952629] ----------------------------------------------------------------------------- [ 39.952633] Disabling lock debugging due to kernel taint [ 39.952635] INFO: Slab 0xffffea00086c6a00 objects=21 used=1 fp=0xffff88021b1abc00 flags=0x5fff8000008100 [ 39.952640] CPU: 1 PID: 1258 Comm: drv_selftest Tainted: G BU 4.10.0+ #46 [ 39.952641] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B17.1602221718 02/22/2016 [ 39.952642] Call Trace: [ 39.952648] dump_stack+0x4d/0x6f [ 39.952651] slab_err+0x9d/0xb0 [ 39.952654] ? ksm_migrate_page+0xe0/0xe0 [ 39.952657] ? on_each_cpu_cond+0x9a/0xc0 [ 39.952658] ? __kmalloc+0x1af/0x1c0 [ 39.952660] ? __kmem_cache_shutdown+0x173/0x3e0 [ 39.952661] __kmem_cache_shutdown+0x196/0x3e0 [ 39.952664] kmem_cache_destroy+0xa0/0x150 [ 39.952708] mock_device_release+0x113/0x140 [i915] [ 39.952726] drm_dev_release+0x20/0x40 [drm] [ 39.952735] drm_dev_unref+0x23/0x30 [drm] [ 39.952768] i915_gem_gtt_mock_selftests+0x55/0x70 [i915] [ 39.952803] __run_selftests+0x169/0x1c0 [i915] [ 39.952805] ? 0xffffffffa0151000 [ 39.952840] i915_mock_selftests+0x30/0x60 [i915] [ 39.952869] i915_init+0xc/0x78 [i915] [ 39.952870] ? 0xffffffffa0151000 [ 39.952872] do_one_initcall+0x43/0x170 [ 39.952874] ? __vunmap+0x81/0xd0 [ 39.952875] ? kmem_cache_alloc_trace+0x37/0x170 [ 39.952877] ? do_init_module+0x27/0x1f8 [ 39.952879] do_init_module+0x5f/0x1f8 [ 39.952881] load_module+0x2423/0x29b0 [ 39.952882] ? __symbol_put+0x40/0x40 [ 39.952885] ? kernel_read_file+0x1a3/0x1c0 [ 39.952887] SYSC_finit_module+0xbc/0xf0 [ 39.952889] SyS_finit_module+0xe/0x10 [ 39.952892] entry_SYSCALL_64_fastpath+0x13/0x94 v2: use onion teardown and favour i915_gem_object_put Fixes: 8d28ba4568f4 ("drm/i915: Exercise filling the top/bottom portions of the ppgtt") Signed-off-by: Matthew Auld Cc: Chris Wilson Cc: Joonas Lahtinen Reviewed-by: Joonas Lahtinen Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c index 0f3fa34377c6..c4a39b7d7dd0 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c @@ -103,7 +103,7 @@ fake_dma_object(struct drm_i915_private *i915, u64 size) obj = i915_gem_object_alloc(i915); if (!obj) - return ERR_PTR(-ENOMEM); + goto err; drm_gem_private_object_init(&i915->drm, &obj->base, size); i915_gem_object_init(obj, &fake_ops); @@ -114,10 +114,15 @@ fake_dma_object(struct drm_i915_private *i915, u64 size) /* Preallocate the "backing storage" */ if (i915_gem_object_pin_pages(obj)) - return ERR_PTR(-ENOMEM); + goto err_obj; i915_gem_object_unpin_pages(obj); return obj; + +err_obj: + i915_gem_object_put(obj); +err: + return ERR_PTR(-ENOMEM); } static int igt_ppgtt_alloc(void *arg)