bpf: add bpf_clone_redirect to bpf_helper_changes_pkt_data
authorDaniel Borkmann <daniel@iogearbox.net>
Wed, 24 May 2017 23:05:07 +0000 (01:05 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 25 May 2017 17:44:28 +0000 (13:44 -0400)
The bpf_clone_redirect() still needs to be listed in
bpf_helper_changes_pkt_data() since we call into
bpf_try_make_head_writable() from there, thus we need
to invalidate prior pkt regs as well.

Fixes: 36bbef52c7eb ("bpf: direct packet write and access for helpers for clsact progs")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/filter.c

index a253a61..a6bb95f 100644 (file)
@@ -2281,6 +2281,7 @@ bool bpf_helper_changes_pkt_data(void *func)
            func == bpf_skb_change_head ||
            func == bpf_skb_change_tail ||
            func == bpf_skb_pull_data ||
+           func == bpf_clone_redirect ||
            func == bpf_l3_csum_replace ||
            func == bpf_l4_csum_replace ||
            func == bpf_xdp_adjust_head)