[PATCH] vringh: Use wiov->used to check for read/write desc order
From: Neeraj Upadhyay <hidden>
Date: 2021-06-22 11:39:00
Also in:
lkml
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
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 <redacted> --- drivers/vhost/vringh.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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;
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