The array size is FTRACE_KSTACK_NESTING, so the index FTRACE_KSTACK_NESTING
is illegal too. And fix two typos by the way.

Signed-off-by: Qiujun Huang <hqjag...@gmail.com>
---
 kernel/trace/trace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 528971714fc6..1e190bcd0d59 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2750,7 +2750,7 @@ trace_event_buffer_lock_reserve(struct trace_buffer 
**current_rb,
        /*
         * If tracing is off, but we have triggers enabled
         * we still need to look at the event data. Use the temp_buffer
-        * to store the trace event for the tigger to use. It's recusive
+        * to store the trace event for the trigger to use. It's recursive
         * safe and will not be recorded anywhere.
         */
        if (!entry && trace_file->flags & EVENT_FILE_FL_TRIGGER_COND) {
@@ -2952,7 +2952,7 @@ static void __ftrace_trace_stack(struct trace_buffer 
*buffer,
        stackidx = __this_cpu_inc_return(ftrace_stack_reserve) - 1;
 
        /* This should never happen. If it does, yell once and skip */
-       if (WARN_ON_ONCE(stackidx > FTRACE_KSTACK_NESTING))
+       if (WARN_ON_ONCE(stackidx >= FTRACE_KSTACK_NESTING))
                goto out;
 
        /*
-- 
2.17.1

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