Re: [PATCH] Add user taint flag

From: Jan Engelhardt
Date: Mon May 22 2006 - 14:56:29 EST

>> > we should then patch the /dev/mem driver or something to set this :)
>> > (well and possibly give it an exception for now for PCI space until the
>> > X people fix their stuff to use the proper sysfs stuff)
>> /dev/mem is used for all sorts of sane things including DMIdecode.
>> Tainting on it isn't terribly useful. Mind you this whole user taint
>> patch seems bogus as it can only be set by root owned processes so
>> doesn't appear to do the job it is intended for - perhaps Ted can
>> explain ?
>Taint on write to /dev/mem, perhaps? I don't think DMIdecode needs to
>scribble on /dev/mem, does it? (Figure if a userspace program runs OK
lm-sensors looks like it pokes (writes) to /dev/mem trying to figure out
some devices.

>on a recent Fedora or RedHat kernel, it doesn't need to scribble on /dev/mem
>too much, because the vast majority of it is lopped out via a patch....)
And what about /dev/port? That can also screw up things, so should probably
be included in the taint unless I am missing something.

Jan Engelhardt
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at