1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 26aba09..c415668 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -582,6 +582,10 @@ static int ioctl_file_dedupe_range(struct file *file, void __user *arg)
 	}
 
 	size = offsetof(struct file_dedupe_range __user, info[count]);
+	if (size > PAGE_SIZE) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
 	same = memdup_user(argp, size);
 	if (IS_ERR(same)) {