129534 – media-libs/allegro-4.2.0-r1 --enable-vga and iopl()

Bug 129534 - media-libs/allegro-4.2.0-r1 --enable-vga and iopl()

Summary: media-libs/allegro-4.2.0-r1 --enable-vga and iopl()

Status:	RESOLVED FIXED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	[OLD] Library (show other bugs)
Hardware:	All Linux

Importance:	High minor (vote)
Assignee:	Gentoo Games

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Reported:	2006-04-10 15:09 UTC by Alar Kvell
Modified:	2007-02-02 20:26 UTC (History)
CC List:	0 users

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Runtime testing required:	---

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Description Alar Kvell 2006-04-10 15:09:14 UTC

I emerged allegro with all graphical stuff disabled:
[ebuild   R   ] media-libs/allegro-4.2.0-r1  -X -alsa -arts -doc -esd -fbcon +mmx -oss +sse -static -svga -tetex

I have hardened-sources (2.4.32-hardened-r1), with Grsecurity, configured with "Disable privileged I/O" option:
CONFIG_GRKERNSEC_IO=y

Using allegro_init() in my program produces the following message in my system logs:
Apr 10 22:38:46 server grsec: From 217.159.165.139: denied use of iopl() by /home/alar/testapp[testapp:16731] uid/euid:1000/1000 gid/egid:100/100, parent /bin/bash[bash:21687] uid/euid:1000/1000 gid/egid:100/100

This happens because allegro is always compiled with --enable-vga (even when all graphical USE flags are disabled) and allegro's VGA portion uses iopl() for some reason (in linux/lsystem.c and unix/uptimer.c files). Recompiling allegro with --disable-vga solves this issue - no more warnings about iopl() calls.

So, why is allegro always compiled with --enable-vga, even when I don't want any graphical stuff in allegro and disable all such USE flags?

Comment 1 Tristan Heaven (RETIRED) gentoo-dev

2007-02-02 20:26:58 UTC

Fixed in 4.2.1