From: Kees Cook Date: Fri, 26 May 2017 04:44:38 +0000 (-0700) Subject: randstruct: Whitelist NIU struct page overloading X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1854c19cae0d108637c40f90ee0bb9b7c1adbc0a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git randstruct: Whitelist NIU struct page overloading 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 Signed-off-by: Kees Cook --- diff --git a/scripts/gcc-plugins/randomize_layout_plugin.c b/scripts/gcc-plugins/randomize_layout_plugin.c index c07818dac401..cdaac8c66734 100644 --- a/scripts/gcc-plugins/randomize_layout_plugin.c +++ b/scripts/gcc-plugins/randomize_layout_plugin.c @@ -46,6 +46,8 @@ 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 */