fix: 回退错误合入的解决getgroups的list比设置的list多一个gid问题的修改

主干不存在该问题.

回退原因是要求维护这边合入的人没有跟问题修改人赵天宇确认，实际上这个问题单解决不在内核这边，
内核这边的提交需要回退

Close #I48FMK
Signed-off-by: Nwanghao-free <wanghao453@huawei.com>

syscall/process_syscall.c

@@ -683,12 +683,12 @@ int SysGetGroupID(void)
 }
 
 #ifdef LOSCFG_SECURITY_CAPABILITY
-static int SetGroups(int size, const int *safeList)
+static int SetGroups(int listSize, const int *safeList, int size)
 {
     User *oldUser = NULL;
     unsigned int intSave;
 
-    User *newUser = LOS_MemAlloc(m_aucSysMem1, sizeof(User) + size * sizeof(int));
+    User *newUser = LOS_MemAlloc(m_aucSysMem1, sizeof(User) + listSize * sizeof(int));
     if (newUser == NULL) {
         return -ENOMEM;
     }
@@ -696,11 +696,14 @@ static int SetGroups(int size, const int *safeList)
     SCHEDULER_LOCK(intSave);
     oldUser = OsCurrUserGet();
     (VOID)memcpy_s(newUser, sizeof(User), oldUser, sizeof(User));
-    if (size != 0) {
+    if (safeList != NULL) {
         (VOID)memcpy_s(newUser->groups, size * sizeof(int), safeList, size * sizeof(int));
     }
+    if (listSize == size) {
+        newUser->groups[listSize] = oldUser->gid;
+    }
 
-    newUser->groupNumber = size;
+    newUser->groupNumber = listSize + 1;
     OsCurrProcessGet()->user = newUser;
     SCHEDULER_UNLOCK(intSave);
 
@@ -721,7 +724,7 @@ static int GetGroups(int size, int list[])
     SCHEDULER_UNLOCK(intSave);
 
     listSize = groupCount * sizeof(int);
-    if ((size == 0) || (groupCount == 0)) {
+    if (size == 0) {
         return groupCount;
     } else if (list == NULL) {
         return -EFAULT;
@@ -779,6 +782,7 @@ int SysSetGroups(int size, const int list[])
 #ifdef LOSCFG_SECURITY_CAPABILITY
     int ret;
     int gid;
+    int listSize = size;
     unsigned int count;
     int *safeList = NULL;
 #endif
@@ -809,14 +813,16 @@ int SysSetGroups(int size, const int list[])
         }
         gid = OsCurrUserGet()->gid;
         for (count = 0; count < size; count++) {
-            if (safeList[count] < 0) {
+            if (safeList[count] == gid) {
+                listSize = size - 1;
+            } else if (safeList[count] < 0) {
                 ret = -EINVAL;
                 goto EXIT;
             }
         }
     }
 
-    ret = SetGroups(size, safeList);
+    ret = SetGroups(listSize, safeList, size);
 EXIT:
     if (safeList != NULL) {
         (void)LOS_MemFree(m_aucSysMem1, safeList);