[xtensa-cvscommit] linux/arch/xtensa/mm fault.c,1.1.1.1,1.2

[<joe...@us...>]

Update of /cvsroot/xtensa/linux/arch/xtensa/mm
In directory usw-pr-cvs1:/tmp/cvs-serv29181/arch/xtensa/mm

Modified Files:
	fault.c 
Log Message:


In handling page faults, also check the PC of the offending instruction before determining whether it was a kernel or user page fault.  This prevents a user program from crashing the kernel with an unmapped address > TASK_SIZE.


Index: fault.c
===================================================================
RCS file: /cvsroot/xtensa/linux/arch/xtensa/mm/fault.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** fault.c	28 Aug 2002 16:10:14 -0000	1.1.1.1
--- fault.c	9 Sep 2002 22:23:54 -0000	1.2
***************
*** 86,90 ****
  	 * 'reference' page table is init_mm.pgd.
  	 */
! 	if (address >= TASK_SIZE)
  		goto vmalloc_fault;
  
--- 86,90 ----
  	 * 'reference' page table is init_mm.pgd.
  	 */
! 	if ((address >= TASK_SIZE) && (regs->pc >= TASK_SIZE))
  		goto vmalloc_fault;