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-rw-r--r--arch/sparc/kernel/kstack.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sparc/kernel/kstack.h b/arch/sparc/kernel/kstack.h
index 4248d969272..5247283d1c0 100644
--- a/arch/sparc/kernel/kstack.h
+++ b/arch/sparc/kernel/kstack.h
@@ -11,6 +11,10 @@ static inline bool kstack_valid(struct thread_info *tp, unsigned long sp)
{
unsigned long base = (unsigned long) tp;
+ /* Stack pointer must be 16-byte aligned. */
+ if (sp & (16UL - 1))
+ return false;
+
if (sp >= (base + sizeof(struct thread_info)) &&
sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
return true;