diff --git a/core/jni/android_util_Process.cpp b/core/jni/android_util_Process.cpp
index 91dfc6023e4200ed2c9e759d3685ea675d0d136f..55100a5347fd8cb06ea3dea025a2b74189824364 100644
--- a/core/jni/android_util_Process.cpp
+++ b/core/jni/android_util_Process.cpp
@@ -282,6 +282,11 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
 void android_os_Process_setProcessFrozen(
         JNIEnv *env, jobject clazz, jint pid, jint uid, jboolean freeze)
 {
+    if (uid < 0) {
+        jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", "uid is negative: %d", uid);
+        return;
+    }
+
     bool success = true;
 
     if (freeze) {
@@ -305,6 +310,11 @@ jint android_os_Process_getProcessGroup(JNIEnv* env, jobject clazz, jint pid)
 }
 
 jint android_os_Process_createProcessGroup(JNIEnv* env, jobject clazz, jint uid, jint pid) {
+    if (uid < 0) {
+        return jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
+                                    "uid is negative: %d", uid);
+    }
+
     return createProcessGroup(uid, pid);
 }
 
@@ -590,12 +600,21 @@ void android_os_Process_setArgV0(JNIEnv* env, jobject clazz, jstring name)
 
 jint android_os_Process_setUid(JNIEnv* env, jobject clazz, jint uid)
 {
+    if (uid < 0) {
+        return jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
+                                    "uid is negative: %d", uid);
+    }
+
     return setuid(uid) == 0 ? 0 : errno;
 }
 
-jint android_os_Process_setGid(JNIEnv* env, jobject clazz, jint uid)
-{
-    return setgid(uid) == 0 ? 0 : errno;
+jint android_os_Process_setGid(JNIEnv* env, jobject clazz, jint gid) {
+    if (gid < 0) {
+        return jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
+                                    "gid is negative: %d", gid);
+    }
+
+    return setgid(gid) == 0 ? 0 : errno;
 }
 
 static int pid_compare(const void* v1, const void* v2)
@@ -1235,11 +1254,21 @@ jintArray android_os_Process_getPidsForCommands(JNIEnv* env, jobject clazz,
 
 jint android_os_Process_killProcessGroup(JNIEnv* env, jobject clazz, jint uid, jint pid)
 {
+    if (uid < 0) {
+        return jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
+                                    "uid is negative: %d", uid);
+    }
+
     return killProcessGroup(uid, pid, SIGKILL);
 }
 
 jint android_os_Process_sendSignalToProcessGroup(JNIEnv* env, jobject clazz, jint uid, jint pid,
                                                  jint signal) {
+    if (uid < 0) {
+        return jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
+                                    "uid is negative: %d", uid);
+    }
+
     return sendSignalToProcessGroup(uid, pid, signal);
 }
 
@@ -1258,6 +1287,11 @@ static jint android_os_Process_nativePidFdOpen(JNIEnv* env, jobject, jint pid, j
 }
 
 void android_os_Process_freezeCgroupUID(JNIEnv* env, jobject clazz, jint uid, jboolean freeze) {
+    if (uid < 0) {
+        jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", "uid is negative: %d", uid);
+        return;
+    }
+
     bool success = true;
 
     if (freeze) {