linux-kernel - Re: [PATCH] Revert "i2c: dev: switch from register

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: <20160528091559.GR11011@mwanda>
Date:	Sat, 28 May 2016 12:15:59 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	Erico Nunes <erico.nunes@...acom.ind.br>,
	kernel-janitors@...r.kernel.org, LKP <lkp@...org>
Subject: Re: [PATCH] Revert "i2c: dev: switch from register_chrdev to cdev
 API"

On Sat, May 28, 2016 at 11:07:47AM +0200, Wolfram Sang wrote:
> This reverts commit d6760b14d4a1243f918d983bba1e35c5a5cd5a6d. When
> hitting Linus' tree, buildbots ran additional checks and found boot
> problems. Although Dan Carpenter provided an obvious fix already, I
> still could not reproduce one problem manually (at least not on a
> Saturday morning). So we'll try again later after some more
> investigation.
> 

These kinds of use after frees don't always cause a runtime problem.  I
found it using static analysis, but I bet you could detect it if you
enabled kasan.  The other option is to enable PAGE_POISONING?

regards,
dan carpenter