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

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

[PATCH] Check for end of stack trace before falling back
Signed-off-by: N Andi Kleen <ak@suse.de>
be7a9170 · Andi Kleen · Andi Kleen · c0b766f1 · be7a9170
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arch/x86_64/kernel/traps.c arch/x86_64/kernel/traps.c +2 -0

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--- 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)