diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index cfeaa010f..58cb0e4f4 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -1006,6 +1006,42 @@
     </arg>
     <leak-ignore/>
   </function>
+  <!-- int setfsgid(uid_t fsgid); -->
+  <function name="setfsgid">
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <leak-ignore/>
+  </function>
+  <!-- int setresuid(uid_t ruid, uid_t euid, uid_t suid);-->
+  <function name="setresuid">
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+    </arg>
+    <arg nr="3">
+      <not-uninit/>
+    </arg>
+    <leak-ignore/>
+  </function>
+  <!-- int setresgid(gid_t rgid, gid_t egid, gid_t sgid);-->
+  <function name="setresgid">
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+    </arg>
+    <arg nr="3">
+      <not-uninit/>
+    </arg>
+    <leak-ignore/>
+  </function>
   <!-- pid_t setsid(void); -->
   <function name="setsid">
     <noreturn>false</noreturn>