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authorKees Cook <keescook@chromium.org>2017-05-25 21:44:38 -0700
committerKees Cook <keescook@chromium.org>2017-06-22 16:21:43 -0700
commit1854c19cae0d108637c40f90ee0bb9b7c1adbc0a (patch)
treea25be4ad05ab2eeff5bb88ab4ef5b36fa411eca5
parent802762cdfff256b6bf3fdb624ac2c56ec043c4f0 (diff)
downloadlinux-1854c19cae0d108637c40f90ee0bb9b7c1adbc0a.tar.bz2
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 <davem@davemloft.net> Signed-off-by: Kees Cook <keescook@chromium.org>
-rw-r--r--scripts/gcc-plugins/randomize_layout_plugin.c2
1 files changed, 2 insertions, 0 deletions
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 */