From: Dan Carpenter <dan.carpenter@oracle.com>
To: "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com>
Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
kernel-janitors@vger.kernel.org
Subject: [PATCH] vhost_vdpa: return -EFAULT if copy_to_user() fails
Date: Wed, 02 Dec 2020 06:44:43 +0000 [thread overview]
Message-ID: <X8c32z5EtDsMyyIL@mwanda> (raw)
The copy_to_user() function returns the number of bytes remaining to be
copied but this should return -EFAULT to the user.
Fixes: 1b48dc03e575 ("vhost: vdpa: report iova range")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/vhost/vdpa.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index d6a37b66770b..ef688c8c0e0e 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -344,7 +344,9 @@ static long vhost_vdpa_get_iova_range(struct vhost_vdpa *v, u32 __user *argp)
.last = v->range.last,
};
- return copy_to_user(argp, &range, sizeof(range));
+ if (copy_to_user(argp, &range, sizeof(range)))
+ return -EFAULT;
+ return 0;
}
static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
--
2.29.2
next reply other threads:[~2020-12-02 6:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-02 6:44 Dan Carpenter [this message]
2020-12-02 8:13 ` [PATCH] vhost_vdpa: return -EFAULT if copy_to_user() fails Jason Wang
2020-12-02 9:14 ` Stefano Garzarella
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