From d934e775227257350a9e42e3dd3f4e19b6bbd68e Mon Sep 17 00:00:00 2001
From: Brian Gianforcaro <b.gianfo@gmail.com>
Date: Sun, 21 Feb 2021 08:05:09 -0800
Subject: [PATCH] Kernel: Use copy_n_from_user in sys$setgroups to check for
 overflow

---
 Kernel/Syscalls/setuid.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Kernel/Syscalls/setuid.cpp b/Kernel/Syscalls/setuid.cpp
index ee01f4e325..9e63ceb6bd 100644
--- a/Kernel/Syscalls/setuid.cpp
+++ b/Kernel/Syscalls/setuid.cpp
@@ -150,7 +150,7 @@ int Process::sys$setgroups(ssize_t count, Userspace<const gid_t*> user_gids)
 
     Vector<gid_t> gids;
     gids.resize(count);
-    if (!copy_from_user(gids.data(), user_gids.unsafe_userspace_ptr(), sizeof(gid_t) * count))
+    if (!copy_n_from_user(gids.data(), user_gids, count))
         return -EFAULT;
 
     HashTable<gid_t> unique_extra_gids;