1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 753b8cfe8b8a..87b97897a881 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -94,6 +94,13 @@ static bool in_exception_stack(unsigned long *stack, struct stack_info *info)
         BUILD_BUG_ON(N_EXCEPTION_STACKS != 6);
 
         begin = (unsigned long)__this_cpu_read(cea_exception_stacks);
+        /*
+         * Handle the case where stack trace is collected _before_
+         * cea_exception_stacks had been initialized.
+         */
+        if (!begin)
+                return false;
+
         end = begin + sizeof(struct cea_exception_stacks);
         /* Bail if @stack is outside the exception stack area. */
         if (stk < begin || stk >= end)