The NIU ethernet driver intentionally stores a page struct pointer on
top of the "mapping" field. Whitelist this case:
drivers/net/ethernet/sun/niu.c: In function ‘niu_rx_pkt_ignore’:
drivers/net/ethernet/sun/niu.c:3402:10: note: found mismatched ssa struct
pointer types: ‘struct page’ and ‘struct address_space’
*link = (struct page *) page->mapping;
~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cc: David S. Miller <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
---
scripts/gcc-plugins/randomize_layout_plugin.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/scripts/gcc-plugins/randomize_layout_plugin.c
b/scripts/gcc-plugins/randomize_layout_plugin.c
index 5f4e59a78eeb..f777ead58ba8 100644
--- a/scripts/gcc-plugins/randomize_layout_plugin.c
+++ b/scripts/gcc-plugins/randomize_layout_plugin.c
@@ -43,6 +43,8 @@ struct whitelist_entry {
};
static const struct whitelist_entry whitelist[] = {
+ /* NIU overloads mapping with page struct */
+ { "drivers/net/ethernet/sun/niu.c", "page", "address_space" },
/* unix_skb_parms via UNIXCB() buffer */
{ "net/unix/af_unix.c", "unix_skb_parms", "char" },
/* big_key payload.data struct splashing */
--
2.7.4
