grsecurity forums

Hello,

When I try to start my X server with NVIDIA-Linux-x86-256.35.run, I get this error
https://home.comcast.net/~x14sg1/syslog.conf, and the screen goes and stays black
and there is no X server running.

When I use NVIDIA-Linux-x86-195.36.31-pkg1.run, everything works

Machine: HP mini 311 w/Intel(R)
CPU : Atom(TM) CPU N280 @ 1.66GHz
Memory : 3G
OS : Slackware 13.1
Kernel : 2.6.34.1 (no local mods other than grsecurity)
Patch : grsecurity-2.2.0-2.6.34.1-201007141116.patch
config : https://home.comcast.net/~x14sg1/config

I have tried the kernel without grsecurity and also with increasing CONFIG_PAX_KERNEXEC_MODULE_TEXT to 14 without any luck

Any ideas?

Thanks

Tim

x14sg1 wrote:I have tried the kernel without grsecurity and also with increasing CONFIG_PAX_KERNEXEC_MODULE_TEXT to 14 without any luck

Any ideas?

yeah, that's UDEREF catching a bug in the nvidia driver, could very well be a security one if the data read directly from userland is used the right way, better let them know . in the meantime turn off UDEREF if you really want to play .

Thanks .... that was it - I changed my config from high to custom so I could turn UDEREF off and nvidia 256.35 works again.

Any suggestion on how to phrase what I report to nvidia (unless what you already said should be sufficient)?

Tim

x14sg1 wrote:Any suggestion on how to phrase what I report to nvidia (unless what you already said should be sufficient)?

i have no idea how nvidia handles these kinds of bugreports, what they expect, etc. probably you should send them this oops at least and they will let you know what else they need from you.