Ken Weaverling wrote: > In article <[EMAIL PROTECTED]>, > Sam Hartman <[EMAIL PROTECTED]> wrote: > If you look at the backtrace from my previous message (portion below), > frame #4 has a valid pointer in context, but in frame three it has 0x1 > and realm is 0x1 .. > > #3 0xb75ad622 in krb5_sendto_kdc (context=0x1, message=0x81214a8, realm=0x1, > reply=0xbfffb510, use_master=1) at sendto_kdc.c:97 > #4 0xb75961f3 in send_as_request (context=0x8117ba0, request=0xbfffb5d0, > time_now=0xbfffb510, ret_err_reply=0xbfffb594, ret_as_reply=0xbfffb598, > use_master=1) at get_in_tkt.c:117 > > I don't see anything within that function that might alter context > unless it happens in kd5_locate_kdc().... (code snippet at end of msg)
It certainly looks like the stack is being damaged after the krb5_sendto_kdc() begins. krbd_locate_kdc() is the most likely target. > Perhaps I could change the code before the malloc to watch for 0x1 in > context and halt the process for debugging at that point, before the > bad malloc call? Can a running process reach out to a gdb and attach > to it?! (or i could just send it into a cpu loop and then attach when > I see something running out of control). As I said, ignorance perhaps! :) The most useful thing would be to add code before and after the krb5_locate_kdc() call to check for context == realm as they are both being set to 0x1. Write to a log file when you find the condition. > thx for the concern... > > ps, I have an open ticket with redhat on this too, but it's not > getting far. They are suggesting we try 1.3.1 from fedora core to see > if it solves the problem, which I'll probably install on saturday. > > Also, this uses a windows 2000 server for KDC. It had done that for > over a year with no problems. This problem happened when we migrated > the server from redhat 7.3 to Redhat enterprise linux (RHEL) 3 over > the holidays. Is the KDC being found via DNS or via entries in a krb5.conf file? Jeffrey Altman ________________________________________________ Kerberos mailing list [EMAIL PROTECTED] https://mailman.mit.edu/mailman/listinfo/kerberos
