3f234147fb
Fix CVE-2021-3544
Check whether the 'res' has already been attach_backing to avoid
memory leak.
Fixes: CVE-2021-3544
Reported-by: default avatarLi Qiang <liq3ea@163.com>
virtio-gpu fix: 204f01b3
("virtio-gpu: fix memory leak
in resource attach backing")
Signed-off-by: default avatarLi Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau's avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-4-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann's avatarGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
50 lines
1.5 KiB
Diff
50 lines
1.5 KiB
Diff
From b9f6004899adb8e501e1b9ce1cb0976a2268ad60 Mon Sep 17 00:00:00 2001
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From: Li Qiang <liq3ea@163.com>
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Date: Tue, 15 Jun 2021 09:56:42 +0800
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Subject: [PATCH] vhost-user-gpu: fix memory leak in vg_resource_attach_backing
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(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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Fix CVE-2021-3544
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Check whether the 'res' has already been attach_backing to avoid
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memory leak.
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Fixes: CVE-2021-3544
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Reported-by: default avatarLi Qiang <liq3ea@163.com>
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virtio-gpu fix: 204f01b3
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("virtio-gpu: fix memory leak
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in resource attach backing")
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Signed-off-by: default avatarLi Qiang <liq3ea@163.com>
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Reviewed-by: Marc-André Lureau's avatarMarc-André Lureau <marcandre.lureau@redhat.com>
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Message-Id: <20210516030403.107723-4-liq3ea@163.com>
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Signed-off-by: Gerd Hoffmann's avatarGerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
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---
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contrib/vhost-user-gpu/main.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/contrib/vhost-user-gpu/main.c b/contrib/vhost-user-gpu/main.c
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index f69af7d17f..4f087d6000 100644
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--- a/contrib/vhost-user-gpu/main.c
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+++ b/contrib/vhost-user-gpu/main.c
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@@ -468,6 +468,11 @@ vg_resource_attach_backing(VuGpu *g,
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return;
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}
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+ if (res->iov) {
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+ cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
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+ return;
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+ }
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+
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ret = vg_create_mapping_iov(g, &ab, cmd, &res->iov);
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if (ret != 0) {
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cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
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--
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2.27.0
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