ftrace: break out modify loop immediately on detection of error

Impact: added precaution on failure detection

Break out of the modifying loop as soon as a failure is detected.
This is just an added precaution found by code review and was not
found by any bug chasing.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 72316d9..11ad796 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -561,8 +561,11 @@ static void ftrace_replace_code(int enable)
                                if ((system_state == SYSTEM_BOOTING) ||
                                    !core_kernel_text(rec->ip)) {
                                        ftrace_free_rec(rec);
-                               } else
+                               } else {
                                        ftrace_bug(failed, rec->ip);
+                                       /* Stop processing */
+                                       return;
+                               }
                        }
                }
        }