[PATCH] missing copy_from_user check in comx_proto_lapb driver

[davej]

diff -urpN --exclude-from=/home/davej/.exclude bk-linus/drivers/net/wan/comx-proto-lapb.c linux-2.5/drivers/net/wan/comx-proto-lapb.c
--- bk-linus/drivers/net/wan/comx-proto-lapb.c	2003-05-20 18:41:21.000000000 +0100
+++ linux-2.5/drivers/net/wan/comx-proto-lapb.c	2003-07-13 06:04:34.000000000 +0100
@@ -232,7 +232,10 @@ static int comxlapb_write_proc(struct fi
 		return -ENOMEM;
 	}
 
-	copy_from_user(page, buffer, count);
+	if (copy_from_user(page, buffer, count)) {
+		free_page((unsigned long)page);
+		return -EFAULT;
+	}
 	if (*(page + count - 1) == '\n') {
 		*(page + count - 1) = 0;
 	}
-
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