From patchwork Tue Jul 9 16:34:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Tvrtko Ursulin X-Patchwork-Id: 13728338 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 24C5DC3DA41 for ; Tue, 9 Jul 2024 16:34:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2E7CA10E5FD; Tue, 9 Jul 2024 16:34:39 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=igalia.com header.i=@igalia.com header.b="jTnfPpR+"; dkim-atps=neutral Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) by gabe.freedesktop.org (Postfix) with ESMTPS id F283510E5F7 for ; Tue, 9 Jul 2024 16:34:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=L1YGG/6nLKQNVCT4mNcLHZccHgt/bEXBUIOKvL2HJvM=; b=jTnfPpR+mDtkl3Slq17DIdAyd8 eCy+JfZpbOUxI4Cozs/4Fhp6Uesb68wA+r5E+NfBpD9gSzpUtl2bP74/ZgpeM7rRKcj+BFr+fRuuO Npy+SuscXz0woNC841NnXP8m0p9qa14wblydrerqwJ0mxfYAeAdBcJHjJjfe/FgM1tSVxkpKgajIm ojSe1Lsu38NxaYoj/UuH2Xyp4QkVb525o4kQEqx142g+Z/Qksr8lTUIH9nY5L063BxmiN3odc/V41 F8I+8Pbc/f00cc55rWzIhkZBBtKmGM16i6Xg5yWS59fyWISXZq6rKzYRtR2flAdEoCRM3WqPMc3Nl 13z+6SHA==; Received: from [84.69.19.168] (helo=localhost) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1sRDnX-00CsoQ-A2; Tue, 09 Jul 2024 18:34:35 +0200 From: Tvrtko Ursulin To: dri-devel@lists.freedesktop.org Cc: =?utf-8?q?Ma=C3=ADra_Canal?= , kernel-dev@igalia.com, Tvrtko Ursulin , Iago Toral Quiroga , stable@vger.kernel.org Subject: [PATCH 06/12] drm/v3d: Fix potential memory leak in the performance extension Date: Tue, 9 Jul 2024 17:34:19 +0100 Message-ID: <20240709163425.58276-7-tursulin@igalia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240709163425.58276-1-tursulin@igalia.com> References: <20240709163425.58276-1-tursulin@igalia.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Tvrtko Ursulin If fetching of userspace memory fails during the main loop, all drm sync objs looked up until that point will be leaked because of the missing drm_syncobj_put. Fix it by exporting and using a common cleanup helper. Signed-off-by: Tvrtko Ursulin Fixes: bae7cb5d6800 ("drm/v3d: Create a CPU job extension for the reset performance query job" Cc: Maíra Canal Cc: Iago Toral Quiroga Cc: # v6.8+ --- drivers/gpu/drm/v3d/v3d_drv.h | 2 ++ drivers/gpu/drm/v3d/v3d_sched.c | 22 ++++++++++++----- drivers/gpu/drm/v3d/v3d_submit.c | 42 ++++++++++++++++++++------------ 3 files changed, 44 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h index 95651c3c926f..38c80168da51 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.h +++ b/drivers/gpu/drm/v3d/v3d_drv.h @@ -565,6 +565,8 @@ void v3d_mmu_remove_ptes(struct v3d_bo *bo); /* v3d_sched.c */ void __v3d_timestamp_query_info_free(struct v3d_timestamp_query_info *qinfo, unsigned int count); +void __v3d_performance_query_info_free(struct v3d_performance_query_info *qinfo, + unsigned int count); void v3d_job_update_stats(struct v3d_job *job, enum v3d_queue queue); int v3d_sched_init(struct v3d_dev *v3d); void v3d_sched_fini(struct v3d_dev *v3d); diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c index e45d3ddc6f82..173801aa54ee 100644 --- a/drivers/gpu/drm/v3d/v3d_sched.c +++ b/drivers/gpu/drm/v3d/v3d_sched.c @@ -87,20 +87,30 @@ __v3d_timestamp_query_info_free(struct v3d_timestamp_query_info *qinfo, } } +void +__v3d_performance_query_info_free(struct v3d_performance_query_info *qinfo, + unsigned int count) +{ + if (qinfo->queries) { + unsigned int i; + + for (i = 0; i < count; i++) + drm_syncobj_put(qinfo->queries[i].syncobj); + + kvfree(qinfo->queries); + } +} + static void v3d_cpu_job_free(struct drm_sched_job *sched_job) { struct v3d_cpu_job *job = to_cpu_job(sched_job); - struct v3d_performance_query_info *performance_query = &job->performance_query; __v3d_timestamp_query_info_free(&job->timestamp_query, job->timestamp_query.count); - if (performance_query->queries) { - for (int i = 0; i < performance_query->count; i++) - drm_syncobj_put(performance_query->queries[i].syncobj); - kvfree(performance_query->queries); - } + __v3d_performance_query_info_free(&job->performance_query, + job->performance_query.count); v3d_job_cleanup(&job->base); } diff --git a/drivers/gpu/drm/v3d/v3d_submit.c b/drivers/gpu/drm/v3d/v3d_submit.c index 0f1c900c7d35..81afcfccc6bb 100644 --- a/drivers/gpu/drm/v3d/v3d_submit.c +++ b/drivers/gpu/drm/v3d/v3d_submit.c @@ -645,6 +645,7 @@ v3d_get_cpu_reset_performance_params(struct drm_file *file_priv, struct drm_v3d_reset_performance_query reset; struct v3d_performance_query_info *qinfo = &job->performance_query; unsigned int i, j; + int err; if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -680,32 +681,36 @@ v3d_get_cpu_reset_performance_params(struct drm_file *file_priv, u32 id; if (get_user(sync, syncs++)) { - kvfree(qinfo->queries); - return -EFAULT; + err = -EFAULT; + goto error; } - qinfo->queries[i].syncobj = drm_syncobj_find(file_priv, sync); - if (get_user(ids, kperfmon_ids++)) { - kvfree(qinfo->queries); - return -EFAULT; + err = -EFAULT; + goto error; } ids_pointer = u64_to_user_ptr(ids); for (j = 0; j < reset.nperfmons; j++) { if (get_user(id, ids_pointer++)) { - kvfree(qinfo->queries); - return -EFAULT; + err = -EFAULT; + goto error; } qinfo->queries[i].kperfmon_ids[j] = id; } + + qinfo->queries[i].syncobj = drm_syncobj_find(file_priv, sync); } qinfo->count = reset.count; qinfo->nperfmons = reset.nperfmons; return 0; + +error: + __v3d_performance_query_info_free(qinfo, i); + return err; } static int @@ -718,6 +723,7 @@ v3d_get_cpu_copy_performance_query_params(struct drm_file *file_priv, struct drm_v3d_copy_performance_query copy; struct v3d_performance_query_info *qinfo = &job->performance_query; unsigned int i, j; + int err; if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -756,27 +762,27 @@ v3d_get_cpu_copy_performance_query_params(struct drm_file *file_priv, u32 id; if (get_user(sync, syncs++)) { - kvfree(qinfo->queries); - return -EFAULT; + err = -EFAULT; + goto error; } - qinfo->queries[i].syncobj = drm_syncobj_find(file_priv, sync); - if (get_user(ids, kperfmon_ids++)) { - kvfree(qinfo->queries); - return -EFAULT; + err = -EFAULT; + goto error; } ids_pointer = u64_to_user_ptr(ids); for (j = 0; j < copy.nperfmons; j++) { if (get_user(id, ids_pointer++)) { - kvfree(qinfo->queries); - return -EFAULT; + err = -EFAULT; + goto error; } qinfo->queries[i].kperfmon_ids[j] = id; } + + qinfo->queries[i].syncobj = drm_syncobj_find(file_priv, sync); } qinfo->count = copy.count; qinfo->nperfmons = copy.nperfmons; @@ -789,6 +795,10 @@ v3d_get_cpu_copy_performance_query_params(struct drm_file *file_priv, job->copy.stride = copy.stride; return 0; + +error: + __v3d_performance_query_info_free(qinfo, i); + return err; } /* Whenever userspace sets ioctl extensions, v3d_get_extensions parses data