Index: ptrace.c
===================================================================
RCS file: /cvs/linux/linux/kernel/ptrace.c,v
retrieving revision 1.2
diff -c -p -r1.2 ptrace.c
*** ptrace.c	1999/07/23 02:04:32	1.2
--- ptrace.c	1999/08/02 02:23:45
*************** repeat:
*** 38,43 ****
--- 38,45 ----
  	pgtable = pte_offset(pgmiddle, addr);
  	if (!pte_present(*pgtable))
  		goto fault_in_page;
+ 	if (write && !pte_write(*pgtable))
+ 		goto fault_in_page;
  	page = pte_page(*pgtable);
  	if (MAP_NR(page) >= max_mapnr)
  		return 0;