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- CVE: CVE-2021-3544
- Upstream-Status: Backport
- Signed-off-by: Ross Burton <ross.burton@arm.com>
- From b9f79858a614d95f5de875d0ca31096eaab72c3b Mon Sep 17 00:00:00 2001
- From: Li Qiang <liq3ea@163.com>
- Date: Sat, 15 May 2021 20:03:58 -0700
- Subject: [PATCH 3/7] vhost-user-gpu: fix memory leak in
- vg_resource_attach_backing (CVE-2021-3544)
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- Check whether the 'res' has already been attach_backing to avoid
- memory leak.
- Fixes: CVE-2021-3544
- Reported-by: Li Qiang <liq3ea@163.com>
- virtio-gpu fix: 204f01b309 ("virtio-gpu: fix memory leak
- in resource attach backing")
- Signed-off-by: Li Qiang <liq3ea@163.com>
- Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
- Message-Id: <20210516030403.107723-4-liq3ea@163.com>
- Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
- ---
- contrib/vhost-user-gpu/vhost-user-gpu.c | 5 +++++
- 1 file changed, 5 insertions(+)
- diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
- index b5e153d0d6..0437e52b64 100644
- --- a/contrib/vhost-user-gpu/vhost-user-gpu.c
- +++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
- @@ -489,6 +489,11 @@ vg_resource_attach_backing(VuGpu *g,
- return;
- }
-
- + if (res->iov) {
- + cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
- + return;
- + }
- +
- ret = vg_create_mapping_iov(g, &ab, cmd, &res->iov);
- if (ret != 0) {
- cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
- --
- 2.25.1
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