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; ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Kees Cook committed 9 years ago

Commit 1854c191 parent 802762c1 file · +2 −0Browse files

Showing the changes to scripts (1 of 1 file). Show all

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scripts/gcc-plugins/randomize_layout_plugin.c+2−0

@@ -46,6 +46,8 @@ struct whitelist_entry { · 45 unmodified lines
46	46	};
47	47
48	48	static const struct whitelist_entry whitelist[] = {
	49	+ /* NIU overloads mapping with page struct */
	50	+ { "drivers/net/ethernet/sun/niu.c", "page", "address_space" },
49	51	/* unix_skb_parms via UNIXCB() buffer */
50	52	{ "net/unix/af_unix.c", "unix_skb_parms", "char" },
51	53	/* big_key payload.data struct splashing */