On Mon, Aug 12, 2002 at 09:55:21PM +0200, Guido Guenther wrote: > On Mon, Aug 12, 2002 at 12:35:11PM -0400, Mike Martin wrote: > > On Mon, 12 Aug 2002 18:15:12 +0200 > > Fair enough. I've replaced strace.xdm.txt with a new one. > > MikeM > Thanks a lot! The problem is in xdm's genauth.c sumFile function. > XDM reads blindly lot's of data from /dev/mem. When it hits the GIO > address space the machine oopses since this causes a bus error > exception. When one uses /dev/zero(for testing only) instead of /dev/mem > (DisplayManager*randomFile: /dev/zero)) in xdm-config, xdm no longer > crashes. Thanks a lot for the analysis. Now we need to decide on a fix. Here's what I propose: Edit xc/programs/xdm/Imakefile to: * add DEV_RANDOM to the defines passed to the compiler ifdef LinuxArchitecture * add ArmArchitecture, IA64Architecture, and MipsArchitecture to the list to the list for those for which FRAGILE_DEV_MEM is defined (will this actually solve the problem even in the absence of the prior fix?) What do you guys think? These #defines only affect genauth.c. -- G. Branden Robinson | What influenced me to atheism was Debian GNU/Linux | reading the Bible cover to cover. branden@debian.org | Twice. http://people.debian.org/~branden/ | -- J. Michael Straczynski
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