tracing: Fix null pointer deref with SEND_SIG_FORCED

[safe/jmp/linux-2.6] / include / trace / events / signal.h

diff --git a/include/trace/events/signal.h b/include/trace/events/signal.h
index a510b75..17df434 100644 (file)
--- a/include/trace/events/signal.h
+++ b/include/trace/events/signal.h
@@ -10,7 +10,8 @@
 
 #define TP_STORE_SIGINFO(__entry, info)                                \
        do {                                                    \
-               if (info == SEND_SIG_NOINFO) {                  \
+               if (info == SEND_SIG_NOINFO ||                  \
+                   info == SEND_SIG_FORCED) {                  \
                        __entry->errno  = 0;                    \
                        __entry->code   = SI_USER;              \
                } else if (info == SEND_SIG_PRIV) {             \
@@ -100,18 +101,7 @@ TRACE_EVENT(signal_deliver,
                  __entry->sa_handler, __entry->sa_flags)
 );
 
-/**
- * signal_overflow_fail - called when signal queue is overflow
- * @sig: signal number
- * @group: signal to process group or not (bool)
- * @info: pointer to struct siginfo
- *
- * Kernel fails to generate 'sig' signal with 'info' siginfo, because
- * siginfo queue is overflow, and the signal is dropped.
- * 'group' is not 0 if the signal will be sent to a process group.
- * 'sig' is always one of RT signals.
- */
-TRACE_EVENT(signal_overflow_fail,
+DECLARE_EVENT_CLASS(signal_queue_overflow,
 
        TP_PROTO(int sig, int group, struct siginfo *info),
 
@@ -135,6 +125,24 @@ TRACE_EVENT(signal_overflow_fail,
 );
 
 /**
+ * signal_overflow_fail - called when signal queue is overflow
+ * @sig: signal number
+ * @group: signal to process group or not (bool)
+ * @info: pointer to struct siginfo
+ *
+ * Kernel fails to generate 'sig' signal with 'info' siginfo, because
+ * siginfo queue is overflow, and the signal is dropped.
+ * 'group' is not 0 if the signal will be sent to a process group.
+ * 'sig' is always one of RT signals.
+ */
+DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail,
+
+       TP_PROTO(int sig, int group, struct siginfo *info),
+
+       TP_ARGS(sig, group, info)
+);
+
+/**
  * signal_lose_info - called when siginfo is lost
  * @sig: signal number
  * @group: signal to process group or not (bool)
@@ -145,28 +153,13 @@ TRACE_EVENT(signal_overflow_fail,
  * 'group' is not 0 if the signal will be sent to a process group.
  * 'sig' is always one of non-RT signals.
  */
-TRACE_EVENT(signal_lose_info,
+DEFINE_EVENT(signal_queue_overflow, signal_lose_info,
 
        TP_PROTO(int sig, int group, struct siginfo *info),
 
-       TP_ARGS(sig, group, info),
-
-       TP_STRUCT__entry(
-               __field(        int,    sig     )
-               __field(        int,    group   )
-               __field(        int,    errno   )
-               __field(        int,    code    )
-       ),
-
-       TP_fast_assign(
-               __entry->sig    = sig;
-               __entry->group  = group;
-               TP_STORE_SIGINFO(__entry, info);
-       ),
-
-       TP_printk("sig=%d group=%d errno=%d code=%d",
-                 __entry->sig, __entry->group, __entry->errno, __entry->code)
+       TP_ARGS(sig, group, info)
 );
+
 #endif /* _TRACE_SIGNAL_H */
 
 /* This part must be outside protection */