TWiki> LinuxSupport Web>LinuxSupportInternals>FunnyThingsOn64Bit (2010-05-20, JaroslawPolok) EditAttachPDF
Things currently broken on IA64 and/or Opterons. IA64 has usually more constructive/repeatable behaviour..

  • Kerberos4: libdes mixup -> segfault (SLC3, SLC4 to be checked))
    • pam_afs/pam_afs.krb segfaults when trying to login with username/passwd via ssh
      • routine des_key_sched() messes up pointers -> all (64-bit) pointers become useless 32-bit pointers
      • des_key_sched() exists in way too many libraries (e.g. krb4, krbafs, ...) and all of them are linked into sshd
      • it seems we were lucky that we got a working des_key_sched() routine up to now as the one used in sshd
    • problem will apper on EM64T/AMD64 when virt. mem is above 4GB.
      • it will appear at "random" -> whenever one of the pointers is longer then 32 bit
  • OpenAFS: needs support for /proc-based interface from OpenAFS-1.4 onward, need this in libkrbafs on SLC3 (SLC4 seems ok?)
    • OpenAFS-1.4 does not register syscall hooks -> k_hasafs can not find AFS syscall -> krbafs thinks that AFS is not installed
    • patch taken from krbafs in SLC4

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Topic revision: r3 - 2010-05-20 - JaroslawPolok
 
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