linux-kernel - [PATCH 3.10 46/70] netfilter: xt_bpf: add mising opaque struct sk

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Message-Id: <20141119205212.454947686@linuxfoundation.org>
Date:	Wed, 19 Nov 2014 12:52:37 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Pablo Neira Ayuso <pablo@...filter.org>,
	Willem de Bruijn <willemb@...gle.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.10 46/70] netfilter: xt_bpf: add mising opaque struct sk_filter definition

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pablo Neira <pablo@...filter.org>

commit e10038a8ec06ac819b7552bb67aaa6d2d6f850c1 upstream.

This structure is not exposed to userspace, so fix this by defining
struct sk_filter; so we skip the casting in kernelspace. This is safe
since userspace has no way to lurk with that internal pointer.

Fixes: e6f30c7 ("netfilter: x_tables: add xt_bpf match")
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Acked-by: Willem de Bruijn <willemb@...gle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/uapi/linux/netfilter/xt_bpf.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/include/uapi/linux/netfilter/xt_bpf.h
+++ b/include/uapi/linux/netfilter/xt_bpf.h
@@ -6,6 +6,8 @@

 #define XT_BPF_MAX_NUM_INSTR	64

+struct sk_filter;
+
 struct xt_bpf_info {
 	__u16 bpf_program_num_elem;
 	struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR];

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