From patchwork Tue May 9 17:22:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 13236043 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4FA5C77B7C for ; Tue, 9 May 2023 17:23:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230119AbjEIRXW (ORCPT ); Tue, 9 May 2023 13:23:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229533AbjEIRXV (ORCPT ); Tue, 9 May 2023 13:23:21 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 010424EC5; Tue, 9 May 2023 10:22:57 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-6439b410679so3867917b3a.0; Tue, 09 May 2023 10:22:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1683652977; x=1686244977; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=h8H4gLY9QD6JR3rBgoCS4vvXjxVaagMATkBih9kNdRg=; b=EMBC+q+FGd7Q3uU5/5oV3B6UZEISuagmTJ9Cx076RXqV8Ik2Zb9HknVj5oCHgmH3Ug RFVHxwYh58xvNHtou7+BfSvFF5zxGKfwDARu9iF/4Cd5yr2prKfvY9M0/QdmyCqtYotM 3+6sXXNvM90RXZ+b2227fnKcHESoJ6NGaKMkEPROokGe8Gx3YIrBCsKUWgBAptXVqE9G fC6DUtFjBKNBe7Y1UhZj1+NrmwGoSE0D25r0zsLKAzktvG/P3xNq9gPJiiaQYP/cNKgK sv+wVvIzvrBU/0O1jFgrffWR38BDiAR+J1MTKRd5QtP73pVqtfJNT8L+Z42izNjuwM0y rpdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683652977; x=1686244977; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=h8H4gLY9QD6JR3rBgoCS4vvXjxVaagMATkBih9kNdRg=; b=TDCUFbpCW1QN87GPX8dTRRUeHn/oVzc1WVXXXhBQ2efgirhwXGnUH8FE1VZtDa9Xq+ CbywlCIGHq4OW0e9M/SulUDJn2Ru9f4QM3PXF0bAnHiR6S8AkPbrRoYJMh+rW+dVmGSY eSZvu/bB99IlbrmRYc2csGzLq74EKfwp1a5+Y0gpgWbNWR/cB5+zGBZfDAEh6T8U5+TG bXx3vIrraRhPPtMfceAcm2Wwd7n7j1Sg3I8oskTCUXByv2UR6G+LPUeVDKgJm+a1XdUm GNQbGMYufziZ0s2Psd1Wbjy+vKWjC4hJBM54uyE82XHkk6i3nN6r9bjh4uL/YIFJzsQW b4yA== X-Gm-Message-State: AC+VfDySgEyrFMgSz+f9GnTs0KSdvrUWY3ZNllYPscEL5TgWH09bwANV 6gjwFCKmcY9XKxX2sAYh72I= X-Google-Smtp-Source: ACHHUZ7n2ye/CuTjs4se99yvH8Xq0S3axmyWPzeGYkUleujVONQhA3IefUZmticF0BdwwXUn6OV+xw== X-Received: by 2002:a05:6a21:920d:b0:eb:69b3:116c with SMTP id tl13-20020a056a21920d00b000eb69b3116cmr17192888pzb.52.1683652977404; Tue, 09 May 2023 10:22:57 -0700 (PDT) Received: from localhost ([2a00:79e1:abd:4a00:61b:48ed:72ab:435b]) by smtp.gmail.com with ESMTPSA id e5-20020aa78c45000000b00639fc7124c2sm2072001pfd.148.2023.05.09.10.22.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 May 2023 10:22:57 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, Rob Clark , pinkperfect2021@gmail.com, Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , David Airlie , Daniel Vetter , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v3] drm/msm: Fix submit error-path leaks Date: Tue, 9 May 2023 10:22:53 -0700 Message-Id: <20230509172253.383964-1-robdclark@gmail.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Rob Clark For errors after msm_submitqueue_get(), we need to drop the submitqueue reference. Additionally after get_unused_fd() we need to drop the fd. The ordering for dropping the queue lock and put_unused_fd() is not important, so just move this all into out_post_unlock. v2: Only drop queue ref if submit doesn't take it v3: Fix unitialized submit ref in error path Reported-by: pinkperfect2021@gmail.com Fixes: f0de40a131d9 drm/msm: ("Reorder lock vs submit alloc") Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_gem_submit.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index 6c6aefaa72be..c994d4a13580 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -720,21 +720,21 @@ static void msm_process_post_deps(struct msm_submit_post_dep *post_deps, } } } int msm_ioctl_gem_submit(struct drm_device *dev, void *data, struct drm_file *file) { struct msm_drm_private *priv = dev->dev_private; struct drm_msm_gem_submit *args = data; struct msm_file_private *ctx = file->driver_priv; - struct msm_gem_submit *submit; + struct msm_gem_submit *submit = NULL; struct msm_gpu *gpu = priv->gpu; struct msm_gpu_submitqueue *queue; struct msm_ringbuffer *ring; struct msm_submit_post_dep *post_deps = NULL; struct drm_syncobj **syncobjs_to_reset = NULL; int out_fence_fd = -1; bool has_ww_ticket = false; unsigned i; int ret; @@ -767,27 +767,29 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, queue = msm_submitqueue_get(ctx, args->queueid); if (!queue) return -ENOENT; ring = gpu->rb[queue->ring_nr]; if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) { out_fence_fd = get_unused_fd_flags(O_CLOEXEC); if (out_fence_fd < 0) { ret = out_fence_fd; - return ret; + goto out_post_unlock; } } submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds); - if (IS_ERR(submit)) - return PTR_ERR(submit); + if (IS_ERR(submit)) { + ret = PTR_ERR(submit); + goto out_post_unlock; + } trace_msm_gpu_submit(pid_nr(submit->pid), ring->id, submit->ident, args->nr_bos, args->nr_cmds); ret = mutex_lock_interruptible(&queue->lock); if (ret) goto out_post_unlock; if (args->flags & MSM_SUBMIT_SUDO) submit->in_rb = true; @@ -962,25 +964,33 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs); msm_process_post_deps(post_deps, args->nr_out_syncobjs, submit->user_fence); out: submit_cleanup(submit, !!ret); if (has_ww_ticket) ww_acquire_fini(&submit->ticket); out_unlock: - if (ret && (out_fence_fd >= 0)) - put_unused_fd(out_fence_fd); mutex_unlock(&queue->lock); out_post_unlock: - msm_gem_submit_put(submit); + if (ret && (out_fence_fd >= 0)) + put_unused_fd(out_fence_fd); + if (submit) { + msm_gem_submit_put(submit); + } else { + /* + * If the submit hasn't yet taken ownership of the queue + * then we need to drop the reference ourself: + */ + msm_submitqueue_put(queue); + } if (!IS_ERR_OR_NULL(post_deps)) { for (i = 0; i < args->nr_out_syncobjs; ++i) { kfree(post_deps[i].chain); drm_syncobj_put(post_deps[i].syncobj); } kfree(post_deps); } if (!IS_ERR_OR_NULL(syncobjs_to_reset)) { for (i = 0; i < args->nr_in_syncobjs; ++i) {