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- CVE: CVE-2021-3544
- Upstream-Status: Backport
- Signed-off-by: Ross Burton <ross.burton@arm.com>
- From b7afebcf9e6ecf3cf9b5a9b9b731ed04bca6aa3e Mon Sep 17 00:00:00 2001
- From: Li Qiang <liq3ea@163.com>
- Date: Sat, 15 May 2021 20:03:59 -0700
- Subject: [PATCH 4/7] vhost-user-gpu: fix memory leak while calling
- 'vg_resource_unref' (CVE-2021-3544)
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- If the guest trigger following sequences, the attach_backing will be leaked:
- vg_resource_create_2d
- vg_resource_attach_backing
- vg_resource_unref
- This patch fix this by freeing 'res->iov' in vg_resource_destroy.
- Fixes: CVE-2021-3544
- Reported-by: Li Qiang <liq3ea@163.com>
- virtio-gpu fix: 5e8e3c4c75 ("virtio-gpu: fix resource leak
- in virgl_cmd_resource_unref")
- Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
- Signed-off-by: Li Qiang <liq3ea@163.com>
- Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
- Message-Id: <20210516030403.107723-5-liq3ea@163.com>
- Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
- ---
- contrib/vhost-user-gpu/vhost-user-gpu.c | 1 +
- 1 file changed, 1 insertion(+)
- diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
- index 0437e52b64..770dfad529 100644
- --- a/contrib/vhost-user-gpu/vhost-user-gpu.c
- +++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
- @@ -400,6 +400,7 @@ vg_resource_destroy(VuGpu *g,
- }
-
- vugbm_buffer_destroy(&res->buffer);
- + g_free(res->iov);
- pixman_image_unref(res->image);
- QTAILQ_REMOVE(&g->reslist, res, next);
- g_free(res);
- --
- 2.25.1
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