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Thu, 08 Aug 2019 10:32:48 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x78AWk2L023433; Thu, 8 Aug 2019 10:32:46 GMT Received: from mwanda (/41.57.98.10) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 08 Aug 2019 03:32:45 -0700 Date: Thu, 8 Aug 2019 13:32:36 +0300 From: Dan Carpenter To: Zhenyu Wang , Xiong Zhang Message-ID: <20190808103236.GB30506@mwanda> MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding User-Agent: Mutt/1.10.1 (2018-07-13) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9342 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=981 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908080115 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9342 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908080115 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : mime-version : content-type; s=corp-2019-08-05; bh=U9mddLpT2oUhwBIhERUm/ujj+fo8KPR88Op7z8fL3zg=; b=Wh9F6bdu1qu5UBHaCR4GmvIVoL/cPFnP7sfqeOBmGQnat9NUOucR08M6Pvu8VdF464BN ZD4+8Eh9cWN8QGmG77SJzS+GnxEE9qAzv7X9z0SnuKPZBwIRY7s9K6xHAhtDqU2vKSXI DgNQwNwFi2gRMN8UmFPdB6xGXAblwPKkTG4wzU0NToSyLxCHW6Twe9GlrJhazdTvr6xT 6iVXe5qncXAa+wqnWQ4rm6c/gPGSr8OyNmhrvX3cXSh9cmpNAoEdvK/zZSEXcIKPdEQ/ pxAIoMJ34jISq1l9AhNj9B9xbYq+CnBGCfha4VUxbVeDrXq8kbuFPPbM3ZqOXYcDHXH3 4w== X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : mime-version : content-type; s=corp-2018-07-02; bh=U9mddLpT2oUhwBIhERUm/ujj+fo8KPR88Op7z8fL3zg=; b=x54brwplD4yOwO/nP374W2vXcxn0rUdNTACsLxsWTMMSlm4/NuclMEG4hhd276AQNLux /ToFbClkLBibox3uBbSTtIxKszgAcCysR/uQW/fkqfJh5oc47Y5lUiOUehw3pCtAWXuM g3Uu1JA2gceg6VCVugbhp1Z0ztVeZdVq09cAjs03r1IYVlVSN+oQIsDvEOucLtByUIT9 x6LVXNngfzKuttaz71sEKhHUFeNCsu1RwdS5HQlp2JEoyQNF/wTvaGhhnqMHiFuZjhCQ Em3WQJ5M7P0ktyQT2OV7i6F4ylpsJTl7g0IpKyPY2L+h+ZXKoJ4infjm/59lYVl6UIxi Lg== Subject: [Intel-gfx] [PATCH] drm/i915: Use after free in error path in intel_vgpu_create_workload() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , intel-gfx@lists.freedesktop.org, kernel-janitors@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP We can't free "workload" until after the printk or it's a use after free. Fixes: 2089a76ade90 ("drm/i915/gvt: Checking workload's gma earlier") Signed-off-by: Dan Carpenter Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/gvt/scheduler.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c index 32ae6b5b7e16..ac1dbb176874 100644 --- a/drivers/gpu/drm/i915/gvt/scheduler.c +++ b/drivers/gpu/drm/i915/gvt/scheduler.c @@ -1525,9 +1525,9 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id, if (!intel_gvt_ggtt_validate_range(vgpu, workload->wa_ctx.indirect_ctx.guest_gma, workload->wa_ctx.indirect_ctx.size)) { - kmem_cache_free(s->workloads, workload); gvt_vgpu_err("invalid wa_ctx at: 0x%lx\n", workload->wa_ctx.indirect_ctx.guest_gma); + kmem_cache_free(s->workloads, workload); return ERR_PTR(-EINVAL); } } @@ -1539,9 +1539,9 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id, if (!intel_gvt_ggtt_validate_range(vgpu, workload->wa_ctx.per_ctx.guest_gma, CACHELINE_BYTES)) { - kmem_cache_free(s->workloads, workload); gvt_vgpu_err("invalid per_ctx at: 0x%lx\n", workload->wa_ctx.per_ctx.guest_gma); + kmem_cache_free(s->workloads, workload); return ERR_PTR(-EINVAL); } }