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From 63736af5a6571d9def93769431e0d7e38c6677bf Mon Sep 17 00:00:00 2001
From: Li Qiang <liq3ea@163.com>
Date: Sat, 15 May 2021 20:04:01 -0700
Subject: [PATCH] vhost-user-gpu: fix memory leak in
'virgl_resource_attach_backing' (CVE-2021-3544)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
If 'virgl_renderer_resource_attach_iov' failed, the 'res_iovs' will
be leaked.
Fixes: CVE-2021-3544
Reported-by: Li Qiang <liq3ea@163.com>
virtio-gpu fix: 33243031da ("virtio-gpu-3d: 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: <20210516030403.107723-7-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Upstream-Status: Backport
CVE: CVE-2021-3544
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
contrib/vhost-user-gpu/virgl.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Index: qemu-4.2.0/contrib/vhost-user-gpu/virgl.c
===================================================================
--- qemu-4.2.0.orig/contrib/vhost-user-gpu/virgl.c
+++ qemu-4.2.0/contrib/vhost-user-gpu/virgl.c
@@ -283,8 +283,11 @@ virgl_resource_attach_backing(VuGpu *g,
return;
}
- virgl_renderer_resource_attach_iov(att_rb.resource_id,
+ ret = virgl_renderer_resource_attach_iov(att_rb.resource_id,
res_iovs, att_rb.nr_entries);
+ if (ret != 0) {
+ g_free(res_iovs);
+ }
}
static void
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