linux-kernel - Re: [PATCH] s390: cio: Return -EFAULT if copy_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 1 Mar 2021 13:07:26 -0500
From:   Eric Farman <farman@...ux.ibm.com>
To:     Heiko Carstens <hca@...ux.ibm.com>, Wang Qing <wangqing@...o.com>
Cc:     Cornelia Huck <cohuck@...hat.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Vineeth Vijayan <vneethv@...ux.ibm.com>,
        Peter Oberparleiter <oberpar@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        linux-s390@...r.kernel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] s390: cio: Return -EFAULT if copy_to_user() fails



On 3/1/21 8:13 AM, Heiko Carstens wrote:
> On Mon, Mar 01, 2021 at 08:01:33PM +0800, Wang Qing wrote:
>> The copy_to_user() function returns the number of bytes remaining to be
>> copied, but we want to return -EFAULT if the copy doesn't complete.
>>
>> Signed-off-by: Wang Qing <wangqing@...o.com>
>> ---
>>   drivers/s390/cio/vfio_ccw_ops.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> Applied, thanks!
> 

There's a third copy_to_user() call in this same routine, that deserves 
the same treatment. I'll get that fixup applied.

Thanks,
Eric