linux-kernel - Re: [PATCH] xen: detect uninitialized xenbus in xenbus

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:   Thu, 18 Nov 2021 17:24:46 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Stefano Stabellini <sstabellini@...nel.org>,
        Juergen Gross <jgross@...e.com>
Cc:     Jan Beulich <jbeulich@...e.com>, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org,
        Stefano Stabellini <stefano.stabellini@...inx.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH] xen: detect uninitialized xenbus in xenbus_init


On 11/18/21 4:00 PM, Stefano Stabellini wrote:
>
>          /*
>           * Avoid truncation on 32-bit.
>           * TODO: handle addresses >= 4G
>           */
>          if ( v >= ~0UL ) {
>              err = -EINVAL;
>              goto out_error;
>          }


Since this is only relevant to 32-bit kernels then "#if BITS_PER_LONG == 32".


-boris