[PATCH 3.10 46/70] netfilter: xt_bpf: add mising opaque struct sk_filter definition

From: Greg Kroah-Hartman
Date: Wed Nov 19 2014 - 16:17:47 EST

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


From: Pablo Neira <pablo@xxxxxxxxxxxxx>

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@xxxxxxxxxxxxx>
Acked-by: Willem de Bruijn <willemb@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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 @@


+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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