diff --git a/core/libs/prx/libkernel_sys/Export.cpp b/core/libs/prx/libkernel_sys/Export.cpp
index a0adb45364..b7e777091a 100644
--- a/core/libs/prx/libkernel_sys/Export.cpp
+++ b/core/libs/prx/libkernel_sys/Export.cpp
@@ -273,18 +273,18 @@ int APS5_VABI fstatfs_nid_postfix(int d, void* buf) {
 }
 
 std::int64_t APS5_VABI readlink_nid_postfix(const char* path, char* buffer, std::size_t size) {
+    if (size > static_cast<std::size_t>(std::numeric_limits<std::int64_t>::max())) return Fail(GuestEinval);
     if (path == nullptr) return Fail(GuestEfault);
     if (*path == '\0') return Fail(GuestEnoent);
-    if (size > static_cast<std::size_t>(std::numeric_limits<std::int64_t>::max())) return Fail(GuestEinval);
     std::filesystem::path native;
     if (const int error = ResolvePathError_nid_no_patch(path, native)) return Fail(error);
     return ReadNativeLink(native, buffer, size);
 }
 
 std::int64_t APS5_VABI readlinkat_nid_postfix(int fd, const char* path, char* buffer, std::size_t size) {
+    if (size > static_cast<std::size_t>(std::numeric_limits<std::int64_t>::max())) return Fail(GuestEinval);
     if (path == nullptr) return Fail(GuestEfault);
     if (*path == '\0') return Fail(GuestEnoent);
-    if (size > static_cast<std::size_t>(std::numeric_limits<std::int64_t>::max())) return Fail(GuestEinval);
     if (fd == GuestAtFdcwd || *path == '/') return readlink_nid_postfix(path, buffer, size);
     int error = 0;
     const char* base = GetDirectoryDescriptorPath_nid_no_patch(fd, &error);
diff --git a/core/libs/tests/GuestKernelSys.cpp b/core/libs/tests/GuestKernelSys.cpp
index ea71a5644b..16bd6770eb 100644
--- a/core/libs/tests/GuestKernelSys.cpp
+++ b/core/libs/tests/GuestKernelSys.cpp
@@ -300,6 +300,13 @@ int main() {
     Require(readlink_nid_postfix((root / "missing").string().c_str(), buffer, sizeof(buffer)) == -1 && Error() == 2);
     Require(readlink_nid_postfix("", buffer, sizeof(buffer)) == -1 && Error() == 2);
     Require(readlink_nid_postfix(nullptr, buffer, sizeof(buffer)) == -1 && Error() == 14);
+    constexpr auto hugeSize = static_cast<std::size_t>(-1);
+    Require(readlink_nid_postfix(nullptr, buffer, hugeSize) == -1 && Error() == 22);
+    Require(readlink_nid_postfix("", buffer, hugeSize) == -1 && Error() == 22);
+    Require(readlink_nid_postfix((root / "missing").string().c_str(), buffer, hugeSize) == -1 && Error() == 22);
+    Require(readlinkat_nid_postfix(-100, nullptr, buffer, hugeSize) == -1 && Error() == 22);
+    Require(readlinkat_nid_postfix(-100, "", buffer, hugeSize) == -1 && Error() == 22);
+    Require(readlinkat_nid_postfix(-100, nullptr, buffer, sizeof(buffer)) == -1 && Error() == 14);
 #ifndef _WIN32
     Require(readlink_nid_postfix((root / std::string(300, 'n')).string().c_str(), buffer, sizeof(buffer)) == -1 && Error() == 63);
 #endif