From: Krishna Kumar <krkumar2@in.ibm.com>
To: mst@redhat.com
Cc: netdev@vger.kernel.org, kvm@vger.kernel.org,
Krishna Kumar <krkumar2@in.ibm.com>
Subject: [PATCH] vhost: Fix host panic if ioctl called with wrong index
Date: Tue, 25 May 2010 11:10:36 +0530 [thread overview]
Message-ID: <20100525054036.2022.66692.sendpatchset@krkumar2.in.ibm.com> (raw)
From: Krishna Kumar <krkumar2@in.ibm.com>
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>
---
drivers/vhost/vhost.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -ruNp org/drivers/vhost/vhost.c new/drivers/vhost/vhost.c
--- org/drivers/vhost/vhost.c 2010-05-24 09:25:57.000000000 +0530
+++ new/drivers/vhost/vhost.c 2010-05-24 09:26:53.000000000 +0530
@@ -374,7 +374,7 @@ static long vhost_set_vring(struct vhost
r = get_user(idx, idxp);
if (r < 0)
return r;
- if (idx > d->nvqs)
+ if (idx >= d->nvqs)
return -ENOBUFS;
vq = d->vqs + idx;
next reply other threads:[~2010-05-25 5:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-25 5:40 Krishna Kumar [this message]
2010-05-25 8:13 ` [PATCH] vhost: Fix host panic if ioctl called with wrong index Michael S. Tsirkin
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