fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / i386 / kernel / microcode-xen.c

diff --git a/arch/i386/kernel/microcode-xen.c b/arch/i386/kernel/microcode-xen.c
index f010a90..bf511a7 100644 (file)
--- a/arch/i386/kernel/microcode-xen.c
+++ b/arch/i386/kernel/microcode-xen.c
@@ -84,6 +84,11 @@ static ssize_t microcode_write (struct file *file, const char __user *buf, size_
 {
        ssize_t ret;
 
+       if (len < DEFAULT_UCODE_TOTALSIZE) {
+               printk(KERN_ERR "microcode: not enough data\n"); 
+               return -EINVAL;
+       }
+
        if ((len >> PAGE_SHIFT) > num_physpages) {
                printk(KERN_ERR "microcode: too much data (max %ld pages)\n", num_physpages);
                return -EINVAL;