linux-kernel - Re: [PATCH 0/3] Use new wrappers to copy userspace arrays

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Message-ID: <fc436fea-b9af-5649-0b4e-ef6c0ef37ce9@linux.ibm.com>
Date:   Fri, 1 Dec 2023 12:24:56 +0100
From:   Christian Borntraeger <borntraeger@...ux.ibm.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Philipp Stanner <pstanner@...hat.com>
Cc:     kvm@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH 0/3] Use new wrappers to copy userspace arrays



Am 01.12.23 um 02:52 schrieb Sean Christopherson:
> On Thu, 02 Nov 2023 19:15:23 +0100, Philipp Stanner wrote:
>> Linus recently merged [1] the wrapper functions memdup_array_user() and
>> vmemdup_array_user() in include/linux/string.h for Kernel v6.7
>>
>> I am currently adding them to all places where (v)memdup_user() had been
>> used to copy arrays.
>>
>> The wrapper is different to the wrapped functions only in that it might
>> return -EOVERFLOW. So this new error code might get pushed up to
>> userspace. I hope this is fine.
>>
>> [...]
> 
> Applied to kvm-x86 generic.  Claudio (or anyone else from s390), holler if
> you want to take the s390 patch through the s390 tree.

I think this is fine via your tree.

Feel free to add
Acked-by: Christian Borntraeger <borntraeger@...ux.ibm.com>
to patch 2 if the commit id is not yet final.