该问题是怎么引起的？

kernal_liteos_a/base/ipc/los_signal.c line202:
info->sigInfo 存在空指针解引用

重现步骤

kernal_liteos_a/base/ipc/los_signal.c line263:

kernal_liteos_a/base/ipc/los_signal.c line275:
Take the false branch：
** *info.sigInfo == ((void )0) **
会调用函数：OsSigProcessForeachChild(spcb, SigProcessSignalHandler, &info)

kernal_liteos_a/base/ipc/los_signal.c line180: (arg->sigInfo=NULL;)
Take the true branch：&(taskCB)->threadList != (&(spcb->threadSiblingList))
执行 ret = handler(taskCB, arg);

kernal_liteos_a/base/ipc/los_signal.c line189: (arg->sigInfo=NULL;)
*info = (struct ProcessSignalInfo *)arg ；
line202: The pointer is NULL. info->sigInfo

报错信息