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