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Date: Mon, 26 Nov 2012 17:57:27 +0200 From: "Michael S. Tsirkin" <mst@...hat.com> To: netdev@...r.kernel.org, David Miller <davem@...emloft.net> Cc: Jason Wang <jasowang@...hat.com>, linux-kernel@...r.kernel.org Subject: [PATCH] vhost: fix length for cross region descriptor If a single descriptor crosses a region, the second chunk length should be decremented by size translated so far, instead it includes the full descriptor length. Signed-off-by: Michael S. Tsirkin <mst@...hat.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 ef8f598..5a3d0f1 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1049,7 +1049,7 @@ static int translate_desc(struct vhost_dev *dev, u64 addr, u32 len, } _iov = iov + ret; size = reg->memory_size - addr + reg->guest_phys_addr; - _iov->iov_len = min((u64)len, size); + _iov->iov_len = min((u64)len - s, size); _iov->iov_base = (void __user *)(unsigned long) (reg->userspace_addr + addr - reg->guest_phys_addr); s += size; -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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