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vhost: Fix host panic if ioctl called with wrong index
author
Krishna Kumar
<krkumar2@in.ibm.com>
Tue, 25 May 2010 05:40:36 +0000
(11:10 +0530)
committer
Michael S. Tsirkin
<mst@redhat.com>
Thu, 27 May 2010 09:19:02 +0000
(12:19 +0300)
Missed a boundary value check in vhost_set_vring. The host panics if
idx == nvqs is used in ioctl commands in vhost_virtqueue_init.
Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
drivers/vhost/vhost.c
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diff --git
a/drivers/vhost/vhost.c
b/drivers/vhost/vhost.c
index
750effe
..
44f123a
100644
(file)
--- a/
drivers/vhost/vhost.c
+++ b/
drivers/vhost/vhost.c
@@
-374,7
+374,7
@@
static long vhost_set_vring(struct vhost_dev *d, int ioctl, void __user *argp)
r = get_user(idx, idxp);
if (r < 0)
return r;
- if (idx > d->nvqs)
+ if (idx >
=
d->nvqs)
return -ENOBUFS;
vq = d->vqs + idx;