diff --git a/libprocessgroup/processgroup.cpp b/libprocessgroup/processgroup.cpp
index 94d9502..7c55570 100644
--- a/libprocessgroup/processgroup.cpp
+++ b/libprocessgroup/processgroup.cpp
@@ -528,8 +528,14 @@
 static int KillProcessGroup(
         uid_t uid, pid_t initialPid, int signal, bool once = false,
         std::chrono::steady_clock::time_point until = std::chrono::steady_clock::now() + 2200ms) {
-    CHECK_GE(uid, 0);
-    CHECK_GT(initialPid, 0);
+    if (uid < 0) {
+        LOG(ERROR) << __func__ << ": invalid UID " << uid;
+        return -1;
+    }
+    if (initialPid <= 0) {
+        LOG(ERROR) << __func__ << ": invalid PID " << initialPid;
+        return -1;
+    }
 
     // Always attempt to send a kill signal to at least the initialPid, at least once, regardless of
     // whether its cgroup exists or not. This should only be necessary if a bug results in the
@@ -689,9 +695,6 @@
 }
 
 int createProcessGroup(uid_t uid, pid_t initialPid, bool memControl) {
-    CHECK_GE(uid, 0);
-    CHECK_GT(initialPid, 0);
-
     if (memControl && !UsePerAppMemcg()) {
         LOG(ERROR) << "service memory controls are used without per-process memory cgroup support";
         return -EINVAL;