[REVIEW][PATCH 22/26] signal: Properly set TRACE_SIGNAL_LOSE_INFO in __send_signal

[Eric W. Biederman]

Any time siginfo is not stored in the signal queue information is
lost.  Therefore set TRACE_SIGNAL_LOSE_INFO every time the code does
not allocate a signal queue entry, and a queue overflow abort is not
triggered.

Fixes: ba005e1f4172 ("tracepoint: Add signal loss events")
Signed-off-by: "Eric W. Biederman" <ebied...@xmission.com>
---
 kernel/signal.c | 33 ++++++++++++++++-----------------
 1 file changed, 16 insertions(+), 17 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index d92b636b4e9d..b2f0cf3a68aa 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1131,23 +1131,22 @@ static int __send_signal(int sig, struct kernel_siginfo 
*info, struct task_struc
                        copy_siginfo(&q->info, info);
                        break;
                }
-       } else if (!is_si_special(info)) {
-               if (sig >= SIGRTMIN && info->si_code != SI_USER) {
-                       /*
-                        * Queue overflow, abort.  We may abort if the
-                        * signal was rt and sent by user using something
-                        * other than kill().
-                        */
-                       result = TRACE_SIGNAL_OVERFLOW_FAIL;
-                       ret = -EAGAIN;
-                       goto ret;
-               } else {
-                       /*
-                        * This is a silent loss of information.  We still
-                        * send the signal, but the *info bits are lost.
-                        */
-                       result = TRACE_SIGNAL_LOSE_INFO;
-               }
+       } else if (!is_si_special(info) &&
+                  sig >= SIGRTMIN && info->si_code != SI_USER) {
+               /*
+                * Queue overflow, abort.  We may abort if the
+                * signal was rt and sent by user using something
+                * other than kill().
+                */
+               result = TRACE_SIGNAL_OVERFLOW_FAIL;
+               ret = -EAGAIN;
+               goto ret;
+       } else {
+               /*
+                * This is a silent loss of information.  We still
+                * send the signal, but the *info bits are lost.
+                */
+               result = TRACE_SIGNAL_LOSE_INFO;
        }
 
 out_set:
-- 
2.21.0