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[ Upstream commit 48b491a ] Commit 2e9f609 ("net: hsr: check skb can contain struct hsr_ethhdr in fill_frame_info") added the following which resulted in -EINVAL always being returned: if (skb->mac_len < sizeof(struct hsr_ethhdr)) return -EINVAL; mac_len was not being set correctly so this check completely broke HSR/PRP since it was always 14, not 20. Set mac_len correctly and modify the mac_len checks to test in the correct places since sometimes it is legitimately 14. Fixes: 2e9f609 ("net: hsr: check skb can contain struct hsr_ethhdr in fill_frame_info") Signed-off-by: George McCollister <george.mccollister@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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