From deaa564a66b83c9fe19a37b8a061ec9064ece354 Mon Sep 17 00:00:00 2001
From: Guangyao Ma <guangyao.ma@outlook.com>
Date: Sun, 25 Apr 2021 11:47:05 +0800
Subject: [PATCH] fix: dereference NULL point bug fix

Change-Id: Ib068696c9280105e209469e875c187d741b704d2
---
 kernel/base/ipc/los_signal.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/kernel/base/ipc/los_signal.c b/kernel/base/ipc/los_signal.c
index f6ce9fd3..8edd8db4 100644
--- a/kernel/base/ipc/los_signal.c
+++ b/kernel/base/ipc/los_signal.c
@@ -270,8 +270,12 @@ int OsSigProcessSend(LosProcessCB *spcb, siginfo_t *sigInfo)
         .receivedTcb = NULL
     };
 
+    if (info.sigInfo == NULL){
+        return -EFAULT;
+    }
+
     /* visit all taskcb and dispatch signal */
-    if ((info.sigInfo != NULL) && (info.sigInfo->si_signo == SIGKILL)) {
+    if (info.sigInfo->si_signo == SIGKILL) {
         (void)OsSigProcessForeachChild(spcb, SigProcessKillSigHandler, &info);
         OsSigAddSet(&spcb->sigShare, info.sigInfo->si_signo);
         OsWaitSignalToWakeProcess(spcb);