1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/printk.c b/kernel/printk.c
index 572730bd8a5c..a2276b916769 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -880,7 +880,9 @@ static int syslog_print(char __user *buf, int size)
         syslog_seq++;
         raw_spin_unlock_irq(&logbuf_lock);
 
-        if (len > 0 && copy_to_user(buf, text, len))
+        if (len > size)
+                len = -EINVAL;
+        else if (len > 0 && copy_to_user(buf, text, len))
                 len = -EFAULT;
 
         kfree(text);