| 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
| ||
|
Message-ID: <29109394-30ee-48be-b2e9-dd26e5aa9e28@phunq.net> Date: Wed, 27 May 2015 11:09:25 -0700 From: Daniel Phillips <daniel@...nq.net> To: Pavel Machek <pavel@....cz> Cc: Rik van Riel <riel@...hat.com>, <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>, <tux3@...3.org>, OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>, <mgorman@...e.de>, Andrea Arcangeli <aarcange@...hat.com>, Peter Zijlstra <peterz@...radead.org> Subject: Re: [FYI] tux3: Core changes On Wednesday, May 27, 2015 12:41:37 AM PDT, Pavel Machek wrote: > On Fri 2015-05-15 02:38:33, Daniel Phillips wrote: >> On 05/14/2015 08:06 PM, Rik van Riel wrote: ... > > Umm. Why do you think it is only issue for executable files? I meant: files with code in them, that will be executed. Please excuse me for colliding with the chmod sense. I will say "code files" to avoid ambiguity. > I'm free to mmap() any file, and then execute from it. > > /lib/ld-linux.so /path/to/binary > > is known way to exec programs that do not have x bit set. So... why would I write to a code file at the same time as stepping through it with ptrace? Should I expect ptrace to work perfectly if I do that? What would "work perfectly" mean, if the code is changing at the same time as being traced? Regards, Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists