From patchwork Thu Nov 17 15:02:02 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Foss X-Patchwork-Id: 9434425 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 9308B60469 for ; Thu, 17 Nov 2016 15:03:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 83A3D29543 for ; Thu, 17 Nov 2016 15:03:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7875129585; Thu, 17 Nov 2016 15:03:16 +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, UNPARSEABLE_RELAY 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 1A3AB29543 for ; Thu, 17 Nov 2016 15:03:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B20446E821; Thu, 17 Nov 2016 15:03:15 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5B0156E80C for ; Thu, 17 Nov 2016 15:02:49 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: robertfoss) with ESMTPSA id 8B839268B70 From: robert.foss@collabora.com To: intel-gfx@lists.freedesktop.org, Gustavo Padovan , Daniel Stone , Daniel Vetter , Marius Vlad , Eric Engestrom , Chris Wilson Date: Thu, 17 Nov 2016 10:02:02 -0500 Message-Id: <20161117150209.14810-15-robert.foss@collabora.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161117150209.14810-1-robert.foss@collabora.com> References: <20161117150209.14810-1-robert.foss@collabora.com> Subject: [Intel-gfx] [PATCH i-g-t v6 14/21] tests/sw_sync: Add subtest test_sync_expired_merge 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 From: Rafael Antognolli This test creates an already expired fence, then creates a merged fence out of that expired one (passed twice to the merge operation), and finally closes the merged fence. It shows that if the refcounts are wrong on the original expired fence, it might get freed while still in use. Usually a kernel panick will follow. Signed-off-by: Rafael Antognolli Signed-off-by: Robert Foss --- tests/sw_sync.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/tests/sw_sync.c b/tests/sw_sync.c index 4e52f48..65416ad 100644 --- a/tests/sw_sync.c +++ b/tests/sw_sync.c @@ -582,6 +582,31 @@ static void test_sync_multi_producer_single_consumer(void) pthread_join(threads[i], NULL); } +static void test_sync_expired_merge(void) +{ + int iterations = 1 << 20; + int timeline; + int i; + int fence_expired, fence_merged; + + timeline = sw_sync_timeline_create(); + + sw_sync_timeline_inc(timeline, 100); + fence_expired = sw_sync_fence_create(timeline, 1); + fence_merged = sync_merge(fence_expired, fence_expired); + close(fence_merged); + + for (i = 0; i < iterations; i++) { + int fence = sync_merge(fence_expired, fence_expired); + + igt_assert_f(sync_wait(fence, -1) == 0, + "Failure waiting on fence\n"); + close(fence); + } + + close(fence_expired); +} + static void test_sync_random_merge(void) { int i, size, ret; @@ -687,6 +712,9 @@ igt_main igt_subtest("sync_multi_producer_single_consumer") test_sync_multi_producer_single_consumer(); + igt_subtest("sync_expired_merge") + test_sync_expired_merge(); + igt_subtest("sync_random_merge") test_sync_random_merge(); }