Re: [PATCH v10 6/6] powerpc: Book3S 64-bit outline-only KASAN support

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index a66f435dabbf..9a6fd603f0e7 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c

@@ -2157,8 +2157,8 @@ void show_stack(struct task_struct *tsk, unsigned long *stack,
  			break;
  
  		stack = (unsigned long *) sp;
-		newsp = stack[0];
-		ip = stack[STACK_FRAME_LR_SAVE];
+		newsp = READ_ONCE_NOCHECK(stack[0]);
+		ip = READ_ONCE_NOCHECK(stack[STACK_FRAME_LR_SAVE]);
  		if (!firstframe || ip != lr) {
  			printk("%s["REG"] ["REG"] %pS",
  				loglvl, sp, ip, (void *)ip);

@@ -2176,17 +2176,19 @@ void show_stack(struct task_struct *tsk, unsigned long *stack,
  		 * See if this is an exception frame.
  		 * We look for the "regshere" marker in the current frame.
  		 */
-		if (validate_sp(sp, tsk, STACK_INT_FRAME_SIZE)
-		    && stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) {
+		if (validate_sp(sp, tsk, STACK_INT_FRAME_SIZE) &&
+		    (READ_ONCE_NOCHECK(stack[STACK_FRAME_MARKER]) ==
+		     STACK_FRAME_REGS_MARKER)) {
  			struct pt_regs *regs = (struct pt_regs *)
  				(sp + STACK_FRAME_OVERHEAD);
  
-			lr = regs->link;
+			lr = READ_ONCE_NOCHECK(regs->link);
  			printk("%s--- interrupt: %lx at %pS\n",
-			       loglvl, regs->trap, (void *)regs->nip);
+			       loglvl, READ_ONCE_NOCHECK(regs->trap),
+			       (void *)READ_ONCE_NOCHECK(regs->nip));
  			__show_regs(regs);
  			printk("%s--- interrupt: %lx\n",
-			       loglvl, regs->trap);
+			       loglvl, READ_ONCE_NOCHECK(regs->trap));
  
  			firstframe = 1;
  		}