linux-kernel - Re: [PATCH] KVM: s390: Test for bad access register at the start of S390_MEM

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Message-ID: <4b0ebaab-e287-9a2a-1696-5759f17cafef@redhat.com>
Date:   Thu, 29 Aug 2019 13:56:15 +0200
From:   Thomas Huth <thuth@...hat.com>
To:     Janosch Frank <frankja@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        kvm@...r.kernel.org
Cc:     David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: s390: Test for bad access register at the start of
 S390_MEM_OP

On 29/08/2019 13.15, Janosch Frank wrote:
[...]
> By the way, I think we want to check mop->size for 0 before giving it to
> vmalloc and working with it.

You're right! This currently triggers a kernel warning message with a
Call Trace! I'll add a check to my new memop selftest and send a patch...

 Thomas



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