1 files changed, 8 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 6ec77685df52..d890c1e35ec6 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -27,6 +27,7 @@
 #include <asm/fixed_code.h>
 #include <asm/cacheflush.h>
 #include <asm/mem_map.h>
+#include <asm/mmu_context.h>
 
 /*
  * does not yet catch signals sent when the child dies.
@@ -135,6 +136,13 @@ static inline int is_user_addr_valid(struct task_struct *child,
         if (start >= FIXED_CODE_START && start + len < FIXED_CODE_END)
                 return 0;
 
+#ifdef CONFIG_APP_STACK_L1
+        if (child->mm->context.l1_stack_save)
+                if (start >= (unsigned long)l1_stack_base &&
+                        start + len < (unsigned long)l1_stack_base + l1_stack_len)
+                        return 0;
+#endif
+
         return -EIO;
 }