1 files changed, 2 insertions, 1 deletions

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index c57c5c2f2484..e4988710aa86 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -91,7 +91,8 @@ extern void execve_tail(void);
  * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
  */
 
-#define TASK_SIZE_OF(tsk)       ((tsk)->mm->context.asce_limit)
+#define TASK_SIZE_OF(tsk)       ((tsk)->mm ? \
+                                 (tsk)->mm->context.asce_limit : TASK_MAX_SIZE)
 #define TASK_UNMAPPED_BASE      (test_thread_flag(TIF_31BIT) ? \
                                         (1UL << 30) : (1UL << 41))
 #define TASK_SIZE               TASK_SIZE_OF(current)