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George McCollister f6442ee08f net: hsr: fix mac_len checks

[ Upstream commit 48b491a5cc ]

Commit 2e9f60932a ("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: 2e9f60932a ("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>

2021-06-03 09:00:50 +02:00

hsr_debugfs.c

net: hsr: Convert to DEFINE_SHOW_ATTRIBUTE

2020-09-17 17:05:10 -07:00

hsr_device.c

net: hsr: fix mac_len checks

2021-06-03 09:00:50 +02:00

hsr_device.h

hsr: enhance netlink socket interface to support PRP

2020-07-27 12:20:40 -07:00

hsr_forward.c

net: hsr: fix mac_len checks