Merge branch 'pmu-for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...

[firefly-linux-kernel-4.4.55.git] / arch / arm / kernel / perf_event.c

diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 32395119128344f65410afa7d60d815984659cda..22e194eb8536e5133de1b0703ca870537d70b846 100644 (file)
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -715,7 +715,7 @@ user_backtrace(struct frame_tail __user *tail,
         * Frame pointers should strictly progress back up the stack
         * (towards higher addresses).
         */
-       if (tail >= buftail.fp)
+       if (tail + 1 >= buftail.fp)
                return NULL;
 
        return buftail.fp - 1;