From 4c0c403317913e6fb8b5cfd309dd51d3162dbfe8 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Sun, 25 Jan 2015 17:52:25 +0000
Subject: [PATCH] z80pack: add raw I/O offset check

---
 Kernel/dev/z80pack/devfd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Kernel/dev/z80pack/devfd.c b/Kernel/dev/z80pack/devfd.c
index 3a9fae23..05f59291 100644
--- a/Kernel/dev/z80pack/devfd.c
+++ b/Kernel/dev/z80pack/devfd.c
@@ -79,6 +79,10 @@ static int fd_transfer(bool is_read, uint8_t minor, uint8_t rawflag)
     if(rawflag == 1) {
         dlen = udata.u_count;
         dptr = (uint16_t)udata.u_base;
+        if ((dlen|udata.u_offset) & 0x7F) {
+            udata.u_error = EIO;
+            return -1;
+        }
         block = udata.u_offset >> BLKSHIFT;
         block_xfer = dlen >> 7;		/* We want this in 128 byte sectors */
         map = 1;
-- 
2.34.1