linux-kernel - Re: A divide error bug in snd_pcm

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]

Message-ID: <87leq6gglm.wl-tiwai@suse.de>
Date:   Mon, 26 Sep 2022 20:01:25 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     butt3rflyh4ck <butterflyhuangxx@...il.com>
Cc:     perex@...ex.cz, tiwai@...e.com,
        pierre-louis.bossart@...ux.intel.com, broonie@...nel.org,
        alsa-devel@...a-project.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: A divide error bug in snd_pcm_write

On Mon, 26 Sep 2022 19:16:48 +0200,
butt3rflyh4ck wrote:
> 
> The latest kernel upstream.
> Yes, but using mmap, you can map the runtime->status page, and then
> copy the data through memcpy to overwrite the status->state data, or
> even more, which is incredible.

Ah, then that's exactly the case my latest patch set covers.
Either the first patch or the second patch alone should work.
  https://lore.kernel.org/r/20220926135558.26580-2-tiwai@suse.de
  https://lore.kernel.org/r/20220926135558.26580-3-tiwai@suse.de

Could you verify either of them fixes the problem?

thanks,

Takashi