1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/char/random.c b/drivers/char/random.c
index cd888d4ee605..bd449ad52442 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1895,14 +1895,22 @@ static int
 write_pool(struct entropy_store *r, const char __user *buffer, size_t count)
 {
         size_t bytes;
-        __u32 buf[16];
+        __u32 t, buf[16];
         const char __user *p = buffer;
 
         while (count > 0) {
+                int b, i = 0;
+
                 bytes = min(count, sizeof(buf));
                 if (copy_from_user(&buf, p, bytes))
                         return -EFAULT;
 
+                for (b = bytes ; b > 0 ; b -= sizeof(__u32), i++) {
+                        if (!arch_get_random_int(&t))
+                                break;
+                        buf[i] ^= t;
+                }
+
                 count -= bytes;
                 p += bytes;