[snip]
* Are the r/w accesses to the BIOS and to the first page really
necessary, or could they be eliminated or at least made optional? I
would be willing to trade in e.g. some autoconfiguration features like
DDC for the additional security!
All /dev/mem mappings appear to be r/w simply
Klaus Kusche wrote:
I analyzed Xfree's behaviour with strace. In addition to the two
kinds
of mmap listed above (which are allowed), Xfree makes many r/w mmap
calls to the following two areas of memory (which are blocked by
grsec
and make Xfree fail):
* r/w mmaps of the BIOS (0xf /
* Klaus Kusche ([EMAIL PROTECTED]) wrote:
I analyzed Xfree's behaviour with strace. In addition to the two kinds
of mmap listed above (which are allowed), Xfree makes many r/w mmap
calls to the following two areas of memory (which are blocked by grsec
and make Xfree fail):
* r/w mmaps of
On Sat, 8 Mar 2003, Klaus Kusche wrote:
I use a Sony notebook with an ATI M7 chip, Xfree 4.2.x with the radeon
driver, and a linux kernel 2.4.20 with the gr security patches 1.9.8.
When the /dev/kmem protection in grsec is enabled, Xfree fails to start.
This protection disables all writes
