Stefano Garzarella
2021-Jun-23 16:10 UTC
[PATCH] vringh: Use wiov->used to check for read/write desc order
On Tue, Jun 22, 2021 at 05:07:53PM +0530, Neeraj Upadhyay wrote:>As iov->used is incremented when descriptors are processed >in __vringh_iov(), use it to check for incorrect read >and write descriptor order. > >Signed-off-by: Neeraj Upadhyay <neeraju at codeaurora.org> >--- > drivers/vhost/vringh.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)Reviewed-by: Stefano Garzarella <sgarzare at redhat.com>> >diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c >index 4af8fa2..14e2043 100644 >--- a/drivers/vhost/vringh.c >+++ b/drivers/vhost/vringh.c >@@ -359,7 +359,7 @@ __vringh_iov(struct vringh *vrh, u16 i, > iov = wiov; > else { > iov = riov; >- if (unlikely(wiov && wiov->i)) { >+ if (unlikely(wiov && wiov->used)) { > vringh_bad("Readable desc %p after writable", > &descs[i]); > err = -EINVAL; >-- >QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, >hosted by The Linux Foundation >