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Subject: Re: [PATCH] KVM: s390: Test for bad access register at the start of
 S390_MEM_OP
To:     Janosch Frank <frankja@linux.ibm.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        kvm@vger.kernel.org
Cc:     David Hildenbrand <david@redhat.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>, linux-s390@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20190829105356.27805-1-thuth@redhat.com>
 <870234c7-47ed-6a96-0edf-66d9c2cd7ac0@linux.ibm.com>
From:   Thomas Huth <thuth@redhat.com>
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Organization: Red Hat
Message-ID: <4b0ebaab-e287-9a2a-1696-5759f17cafef@redhat.com>
Date:   Thu, 29 Aug 2019 13:56:15 +0200
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From: Thomas Huth <thuth@redhat.com>
To: Janosch Frank <frankja@linux.ibm.com>,
 Christian Borntraeger <borntraeger@de.ibm.com>, kvm@vger.kernel.org
Cc: David Hildenbrand <david@redhat.com>, Cornelia Huck <cohuck@redhat.com>,
 Heiko Carstens <heiko.carstens@de.ibm.com>, Vasily Gorbik
 <gor@linux.ibm.com>, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
Message-ID: <4b0ebaab-e287-9a2a-1696-5759f17cafef@redhat.com>
Subject: Re: [PATCH] KVM: s390: Test for bad access register at the start of
 S390_MEM_OP
References: <20190829105356.27805-1-thuth@redhat.com>
 <870234c7-47ed-6a96-0edf-66d9c2cd7ac0@linux.ibm.com>
In-Reply-To: <870234c7-47ed-6a96-0edf-66d9c2cd7ac0@linux.ibm.com>

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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 t=
o
> 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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