From: Kefeng Wang <wangkefeng.wang@huawei.com>
Date: Thu, 13 Jul 2017 06:27:58 +0000 (+0800)
Subject: bpf: fix return in bpf_skb_adjust_net
X-Git-Tag: v4.13-rc2~26^2~62
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e4a6a3424b75f23f6bb1cc479974fc305a4b9f78;p=platform%2Fkernel%2Flinux-exynos.git

bpf: fix return in bpf_skb_adjust_net

The bpf_skb_adjust_net() ignores the return value of bpf_skb_net_shrink/grow,
and always return 0, fix it by return 'ret'.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/filter.c b/net/core/filter.c
index c7f7370..f44fc22 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2248,7 +2248,7 @@ static int bpf_skb_adjust_net(struct sk_buff *skb, s32 len_diff)
 		       bpf_skb_net_grow(skb, len_diff_abs);
 
 	bpf_compute_data_end(skb);
-	return 0;
+	return ret;
 }
 
 BPF_CALL_4(bpf_skb_adjust_room, struct sk_buff *, skb, s32, len_diff,