diff --git a/packages/network/samba/scripts/samba-config b/packages/network/samba/scripts/samba-config
index a5c085b7b9..64cd5e22a2 100755
--- a/packages/network/samba/scripts/samba-config
+++ b/packages/network/samba/scripts/samba-config
@@ -10,6 +10,12 @@ SMB_CONF="/run/samba/smb.conf"
 
 SMB_DIR=$(dirname ${SMB_CONF})
 mkdir -p ${SMB_DIR}
+
+# exclusive access
+SMB_LOCK="${SMB_DIR}/samba-config.lock"
+exec 200>"${SMB_LOCK}"
+flock 200
+
 SMB_TMP=$(mktemp -p ${SMB_DIR})
 
 SMB_USERCONF_IS_VALID=no