From: Laurent Vivier <lvivier@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org,
Jason Wang <jasowang@redhat.com>,
netdev@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>,
kvm@vger.kernel.org
Subject: [PATCH] vhost: Fix vhost_vq_reset()
Date: Fri, 12 Mar 2021 15:09:13 +0100 [thread overview]
Message-ID: <20210312140913.788592-1-lvivier@redhat.com> (raw)
vhost_reset_is_le() is vhost_init_is_le(), and in the case of
cross-endian legacy, vhost_init_is_le() depends on vq->user_be.
vq->user_be is set by vhost_disable_cross_endian().
But in vhost_vq_reset(), we have:
vhost_reset_is_le(vq);
vhost_disable_cross_endian(vq);
And so user_be is used before being set.
To fix that, reverse the lines order as there is no other dependency
between them.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
drivers/vhost/vhost.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index a262e12c6dc2..5ccb0705beae 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -332,8 +332,8 @@ static void vhost_vq_reset(struct vhost_dev *dev,
vq->error_ctx = NULL;
vq->kick = NULL;
vq->log_ctx = NULL;
- vhost_reset_is_le(vq);
vhost_disable_cross_endian(vq);
+ vhost_reset_is_le(vq);
vq->busyloop_timeout = 0;
vq->umem = NULL;
vq->iotlb = NULL;
--
2.29.2
next reply other threads:[~2021-03-12 14:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-12 14:09 Laurent Vivier [this message]
2021-03-15 8:31 ` [PATCH] vhost: Fix vhost_vq_reset() Jason Wang
2021-03-17 8:26 ` Stefano Garzarella
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