Xorg 6.8.2 + kmem + grsecurity (amd64)
Posted: Wed Mar 23, 2005 2:15 amI'm having problems using Xorg 6.8.2 with kmem restrictions turned on. 'startx' bails out with the following error message:
Syslog shows that grsec denies the mmap:
Kernel config says that kmem can be used with Xorg since writing to video memory is allowed, but that seems not to be the case.
I'm running a dual Opteron (all 64-bit stuff) system with 10 GB RAM & ATI Rage XL motherboard video. Xorg is compiled with dlloader support and works flawlessly with kmem restrictions turned off. I would like to know how to make this particular combination work, since the description in grsec documentation implies it can be done (and it works on a dual Athlon-mp system with identical kernel options where applicable).
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Using vt 7
(EE) ATI(0): Cannot map V_BIOS
Fatal server error:
xf86MapVidMem: Could not mmap framebuffer (0xfb100000,0x1000) (Operation not permitted)
Syslog shows that grsec denies the mmap:
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grsec: denied mmap write of /dev/[k]mem by /usr/bin/Xorg [...] parent /usr/bin/xinit
Kernel config says that kmem can be used with Xorg since writing to video memory is allowed, but that seems not to be the case.
I'm running a dual Opteron (all 64-bit stuff) system with 10 GB RAM & ATI Rage XL motherboard video. Xorg is compiled with dlloader support and works flawlessly with kmem restrictions turned off. I would like to know how to make this particular combination work, since the description in grsec documentation implies it can be done (and it works on a dual Athlon-mp system with identical kernel options where applicable).