[PATCH] i386: Terminate backtrace fallback early if unwinder stack pointer is zero
Cc: jbeulich@novell.com
Signed-off-by: Andi Kleen <ak@suse.de>
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 4ced428..86fa7e4 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -197,6 +197,8 @@
if (UNW_SP(&info) >= PAGE_OFFSET) {
ops->warning(data, "Leftover inexact backtrace:\n");
stack = (void *)UNW_SP(&info);
+ if (!stack)
+ return;
} else
ops->warning(data, "Full inexact backtrace again:\n");
} else if (call_trace >= 1)