HP rx4610 (4x Itanium), Debian unstable, 2.4.18-itanium-smp Works without problems
HP i2000 (Itanium), Debian unstable, 2.4.18-itanium Machine hangs after read #40; works with "fragile" DEC UDB (Alpha 21066), Debian unstable, 2.4.6 Works without problems I do think that blindly reading /dev/mem is a bad idea though ;) Matt On Mon, Aug 26, 2002 at 01:20:33AM -0500, Branden Robinson wrote: > The long story, for those interested: > > http://lists.debian.org/debian-x/2002/debian-x-200208/msg00091.html > > (and read the whole thread) > > The short story: > > I need people with root on machines of your given architecture to > compile and run the attached C program. It consists of code borrowed > from xdm's genauth.c program. > > The X Strike Force is trying to determine for which architectures it's a > bad idea to read several megabytes of data sequentially from /dev/mem, > because this is exactly what XDM currently does when generating an > XDM-AUTHORIZATION-1 cookie. > > Be warned: on at least some architectures (notably IA-64), this sort of > read has been known to cause untrapped machine checks (a.k.a., lockups > or spontaneous reboots). Arguably the kernel should trap this sort of > nonsense, so you may be in the mood to file a bug against "kernel" after > running this program. > > I and the other folks at the X Strike Force need to know the following > things: > > 1) whether or not this program works when you run it without arguments > 2) if scenario 1) causes problems, what the last line of output was > 3) if scenario 1) causes problems, whether invoking this program with > the argument "fragile" helps it > 4) if scenario 3) causes problems, what the last line of output was > > Remember, this program must be run as root. If normal users can read > from /dev/mem on your machine, you're in trouble. :) > > -- > G. Branden Robinson | No math genius, eh? Then perhaps > Debian GNU/Linux | you could explain to me where you > [EMAIL PROTECTED] | got these... PENROSE TILES! > http://people.debian.org/~branden/ | -- Stephen R. Notley
