Comments on: fglrx: Unknown symbol verify_area

By: Bandi

Bandi — Tue, 01 Aug 2006 21:08:07 +0000

I don’t think you have to blame ATI. Those guys maintaing kernel version 2.6 have no sense of responsibility at all. I’ve run into this problem many-many times that symbols present in one version are removed from the next, new symbols added, etc. So you can’t get everything working since one of your cards needs 2.6.x (exactly) and your other card needs 2.6.y.
Older kernel were much more predictable than this shit.

Thank’s for the patch anyway, I could get my USB WLAN adapter to work under 2.6.14

By: Colin

Colin — Tue, 11 Jul 2006 06:28:38 +0000

Simp: You don\’t have special things to do, because it\’s not really a patch but a standalone module.
All you have to do, when running under the kernel you want to have verify_area available, is:

$ wget http://www.geekounet.org/patch.....rea.tar.gz
$ tar -zxf verify_area.tar.gz
$ cd verify_area
$ make
$ sudo make install
$ sudo modprobe verify_area

And that\’s all :)

By: Simp Dawg

Simp Dawg — Tue, 11 Jul 2006 06:23:51 +0000

I’m excited about trying out the patch you created, but I’m a new Linux user and on the road a lot away from my users group; thus, I’m stuck. I don’t want to screw up my system when I enter the terminal mode as root. Do I need to first pull up some set of text entries to insert the patch in a specific chronology, or do I just log in as root then paste the body of the patch text in its entirety as you’ve typed it? Forgive my level of understanding. We all had to start somewhere; for me it’s with a Linux exclusive laptop. Thanks Gurus

By: Darren Coleman

Darren Coleman — Tue, 13 Jun 2006 10:38:17 +0000

Awesome, this fixes Dell OMSA 4.5 for Redhat 9.0 as well.

Thanks!

By: mrk

mrk — Fri, 21 Apr 2006 20:06:14 +0000

It fixed Paragon NTFS for Linux 3.0 under gentoo 2.6.15 too!

Thanks!

By: Karel Vanthuyne

Karel Vanthuyne — Wed, 22 Feb 2006 08:33:22 +0000

Thanks a lot for your module!

I had trouble installing DELL’s Openmanage Server Administrator software on a server due to the missing verify_area symbol in a 2.6.15 kernel.

Installed you module and hey: it works!

Hopefully DELL will stop using this deprecated symbol soon.

Thanks,

Karel

By: Ramon

Ramon — Tue, 20 Dec 2005 22:58:27 +0000

Your module works excellent.
However sadly I’m missing two extra symbols that are apparently no longer present in 2.6.14

fglrx: Unknown symbol register_ioctl32_conversion
fglrx: Unknown symbol unregister_ioctl32_conversion

So for me it’s back to 2.6.13 I’m afraid
Thanx anyway,

Ramon

By: Ralf Moger

Ralf Moger — Sun, 13 Nov 2005 23:00:28 +0000

Hey everyone,

Ahh, looked all day long for the right answer. Thanks!

But I’ve one question to all ATI-users:
I’ve really hard problems with my ATI Radeon.
fglrxinfo puts out the correct vendor (ATI), render (RADEON) and version string. But everytime, when I switch to the textconsole and try to switch back to X, everything’s locked. Can’t use the mouse, keyboard and see only the half of my screen. It works fine, when I kill X and start it from the textconsole. Then, there’s no problem to switch between X and the textconsole.

I realy do not undestand that!

kernel: 2.6.13.2
CONFIG_AGP=m
CONFIG_AGP_SIS=m
CONFIG_DRM=n
CONFIG_DRM_RADEON=n

The framebuffer is off.

Can s.o. help me?

Thank you, Ralf

By: metro

metro — Wed, 09 Nov 2005 18:18:27 +0000

“Me too” – thank you, worked for me after having been confused over half an hour about the misfunction of the ATI-Thing.
regards,
w.f.

By: Chady

Chady — Sun, 06 Nov 2005 18:59:40 +0000

I noticed that, but since I’m not familiar with the kernel internals, I tried this at first and it worked.

but this can simply be solved, and here’s a patch for firegl_public.c:

http://chady.net/data/fglrx.patch

I also noticed that the macro in drm_os_linux.h isn’t used anywhere, so it can be skipped.

Thanx for pointing this out.

By: Colin

Colin — Sun, 06 Nov 2005 14:06:42 +0000

Did you notice the return value was different ? verify_area() returns 0 if OK, -EFAULT otherwise, whereas access_ok() returns TRUE if OK, FALSE otherwise.

By: Chady

Chady — Sun, 06 Nov 2005 12:33:21 +0000

Nice patch.

Alternatively, instead of messing with the kernel, I patched the driver itself.

since verify_area() and access_ok() have the same signature, you can change the two occurences of verify_area() to access_ok() in :

drm_os_linux.h: line 78
firegl_public.c: line 1478

and recompile the module.
Works like a charm here.

By: churib

churib — Thu, 03 Nov 2005 17:26:55 +0000

you can also change the name of the function in firegl_public.c …
maybe its easier ;)

By: sinister

sinister — Thu, 03 Nov 2005 13:17:22 +0000

man i just spent the past 3 days screwing with the kernel to get this work and then i finally find this.

i love you.

By: Perkins

Perkins — Wed, 02 Nov 2005 18:38:12 +0000

Best way to fix this is probably to update the driver yourself. Just cd to /lib/modules/fglrx/build_mod then run

perl -pi -e ’s/verify_area/access_ok/’ firegl_public.c drm_os_linux.h

(Or just use a text editor on firegl_public.c and drm_os_linux.h and manually change verify_area to access_ok for all occurences in those files..)

.. Worked for me, anyhow.

By: GF@GFcyb.org

GF@GFcyb.org — Wed, 02 Nov 2005 11:55:13 +0000

the commands (as root) to compile and install this verify_area module is:
cd /usr/src/
make all
make install

the goal is to have a file named “verify_area.ko” into the kernel module directory “/lib/modules/2.6.14/extra/”.
now just reboot and check if the new module get loaded on loading of the fglrx ATI Radeon driver (if not, just force-load it, adding a line in with /etc/modules ).
bye from Ferrara, Italy
GF

By: Jason Scheirer

Jason Scheirer — Tue, 01 Nov 2005 22:13:40 +0000

This also fixes proprietary management modules for Dell PowerEdges! Thanks!

By: als

als — Mon, 31 Oct 2005 18:38:49 +0000

How do you install the patch ?
after i extract the tar and run make i get.

CC /root/verify_area/src/verify_area.mod.o
/root/verify_area/src/verify_area.mod.c:9: error: variable `__this_module’ has initializer but incomplete type
/root/verify_area/src/verify_area.mod.c:10: error: unknown field `name’ specified in initializer
/root/verify_area/src/verify_area.mod.c:10: warning: excess elements in struct initializer
/root/verify_area/src/verify_area.mod.c:10: warning: (near initialization for `__this_module’)
/root/verify_area/src/verify_area.mod.c:11: error: unknown field `init’ specified in initializer
/root/verify_area/src/verify_area.mod.c:11: warning: excess elements in struct initializer
/root/verify_area/src/verify_area.mod.c:11: warning: (near initialization for `__this_module’)
/root/verify_area/src/verify_area.mod.c:9: error: storage size of `__this_module’ isn’t known
make[3]: *** [/root/verify_area/src/verify_area.mod.o] Error 1
make[2]: *** [modules] Error 2
make[2]: Leaving directory `/usr/src/linux-2.6.14-ck1′
make[1]: *** [all] Error 2
make[1]: Leaving directory `/root/verify_area/src’
make: *** [all] Error 2

By: Colin

Colin — Mon, 31 Oct 2005 07:29:20 +0000

I think I’ll buy a nvidia card next time
I personnaly think nvidia’s drivers are worse than ATI’s ones, because nVidia’s X driver relies on the kernel driver to load. Which means no X if for some reason the kernel driver can’t load. ATI’s drivers on the other hand, still run X although with no openGL direct rendering, if the kernel driver can’t load.

Also, r300.sourceforge.net is progressing nicely and we’ll soon have free (as in freedom) drivers for ATI cards.

By: chun

chun — Mon, 31 Oct 2005 01:16:42 +0000

great! thanks very much for this workaround! woohoo!

chun

By: Guille

Guille — Sun, 30 Oct 2005 23:28:27 +0000

Thanks for your module, it worked for me…I really hate ati drivers…I think I’ll buy a nvidia card next time.