[PATCH] Check for end of stack trace before falling back

Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index 4ac18b02eada..28e53342f294 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -292,6 +292,8 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * s
                                 if ((long)UNW_SP(&info) < 0) {
                                         ops->warning(data, "Leftover inexact backtrace:\n");
                                         stack = (unsigned long *)UNW_SP(&info);
+                                        if (!stack)
+                                                return;
                                 } else
                                         ops->warning(data, "Full inexact backtrace again:\n");
                         } else if (call_trace >= 1)