linux-kernel - Re: [RFC 1/4] kevent: core files.

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: <44CA5F08.3080500@oracle.com>
Date:	Fri, 28 Jul 2006 12:01:28 -0700
From:	Zach Brown <zach.brown@...cle.com>
To:	Benjamin LaHaise <bcrl@...ck.org>
CC:	David Miller <davem@...emloft.net>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [RFC 1/4] kevent: core files.


> Things were like that at one point in time, but file descriptors turn out 
> to introduce a huge gaping security hole with SUID programs.  The problem 
> is that any event context is closely tied to the address space of the 
> thread issuing the syscalls, and file descriptors do not have this close 
> binding.

Can you go into that hole in more detail?

> Except that you're not usually pulling a full ring worth of events at a 
> time, more often just one.

OK, but then to wait for it you were already sleeping in the kernel, right?

Clearly we should port httpd to kevents and take some measurements :)

- z
-
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/