linux-kernel - Re: [PATCH -next 0/3] s390: use scnprintf() in show() methods

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] [day] [month] [year] [list]

Message-ID: <20200608142556.GA7478@osiris>
Date:   Mon, 8 Jun 2020 16:25:56 +0200
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     Chen Zhou <chenzhou10@...wei.com>
Cc:     gor@...ux.ibm.com, borntraeger@...ibm.com,
        linux-s390@...r.kernel.or, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next 0/3] s390: use scnprintf() in show() methods

On Sat, May 09, 2020 at 04:56:05PM +0800, Chen Zhou wrote:
> snprintf() returns the number of bytes that would be written,
> which may be greater than the the actual length to be written.
> 	    
> show() methods should return the number of bytes printed into the
> buffer. This is the return value of scnprintf().
> 
> Chen Zhou (3):
>   s390/crypto: use scnprintf() instead of snprintf()
>   s390: use scnprintf() in sys_##_prefix##_##_name##_show
>   s390/protvirt: use scnprintf() instead of snprintf()
> 
>  arch/s390/crypto/prng.c | 14 +++++++-------
>  arch/s390/kernel/ipl.c  |  2 +-
>  arch/s390/kernel/uv.c   |  8 ++++----
>  3 files changed, 12 insertions(+), 12 deletions(-)

All applied, even though the buffer has a size of 4k in all cases.
So this doesn't fix anything; but it doesn't hurt as well.