Re: [Xen-devel] Re: [Xen-changelog] [xen-unstable] linux: Fix xenbus device write function.

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 7/3/07 19:48, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote:

>> u->len += len;
>> - if (u->len < (sizeof(u->u.msg) + u->u.msg.len))
>> -  return len;
>> + if ((u->len < sizeof(u->u.msg)) ||
>> +     (u->len < (sizeof(u->u.msg) + u->u.msg.len)))
>> +  return rc;
> 
> What is this trying to achieve?

Check you have a complete header before comparing on the header's length
field.

 -- Keir



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