linux-ext4 - Re: [PATCHv3 02/10] ext4: Fix ext4_fc

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 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, 17 Mar 2022 14:38:46 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Sven Schnelle <svens@...ux.ibm.com>
Cc:     Ritesh Harjani <riteshh@...ux.ibm.com>, linux-ext4@...r.kernel.org,
        Jan Kara <jack@...e.cz>, "Theodore Ts'o" <tytso@....edu>,
        Harshad Shirwadkar <harshadshirwadkar@...il.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...nel.org, hca@...ux.ibm.com
Subject: Re: [PATCHv3 02/10] ext4: Fix ext4_fc_stats trace point

On Thu, 17 Mar 2022 17:11:42 +0100
Sven Schnelle <svens@...ux.ibm.com> wrote:


> Looking at the oops output again made me realizes that the snprintf
> tries to write into pages that are mapped RO. Talking to Heiko he
> mentioned that s390 maps rodata/text RO when setting up the initial
> mapping while x86 has a RW mapping in the beginning and changes that
> later to RO. I haven't verified that, but that might be a reason why it
> works on x86.
> 

Yes, I discovered this too. I'm currently looking to see how to fix it.

-- Steve