linux-kernel - Re: [Patch 0/2] powerpc: avoid userspace poking to legacy ioports

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] [day] [month] [year] [list]

Message-Id: <1203368716.6740.24.camel@pasglop>
Date:	Tue, 19 Feb 2008 08:05:16 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Christian Krafft <krafft@...ibm.com>, linux-kernel@...r.kernel.org,
	parabelboi@...serverein.de, linuxppc-dev@...abs.org
Subject: Re: [Patch 0/2] powerpc: avoid userspace poking to legacy ioports


> 
> * Super-I/O chips at 0x2e/0x2f and 0x4e/0x4f.
> 
> * Legacy PC hardware monitoring chips at 0x290-0x297.
> 
> * IPMI interface at 0x0ca3 and 0x0cab (read-only).
> 
> Please tell me which ones should be skipped on PowerPC.

Skip the whole thing. I consider that on a powerpc linux port, the
platform is responsible for telling drivers where things are (via the
device tree generally)
 
> Christian, can you tell me which of these probes caused trouble for you?
> 
> > > And how is userland code poking at random ports different from kernel
> > > code poking at random ports? We could move sensors-detect inside the
> > > kernel (and I have some plan to do that) but I fail to see how this
> > > would solve this particular problem.
> > 
> > It wouldn't, but at least I could NAK it or make it CONFIG_X86 :-)
> 
> The same could be done for user-space (or at the /dev/port level.)

Well, there are -other- legit usages of /dev/port...

Ben.


--
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/