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[lwip-devel] [bug #50042] ETHADDR16_COPY from netif->hwaddr

From: Daniel Elstner
Subject: [lwip-devel] [bug #50042] ETHADDR16_COPY from netif->hwaddr
Date: Thu, 12 Jan 2017 21:20:22 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/55.0.2883.87 Chrome/55.0.2883.87 Safari/537.36


                 Summary: ETHADDR16_COPY from netif->hwaddr
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: danielk
            Submitted on: Thu 12 Jan 2017 10:20:21 PM CET
                Category: ARP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.0.0



ETHADDR16_COPY is supposed to work with 16-bit aligned source and destination,
but etharp_input() uses the macro with source netif->hwaddr, which is not
16-bit aligned.

struct netif::hwaddr could easily be made 16-bit aligned by re-arranging the
fields surrounding it. Alternatively, etharp_input() should not use
ETHADDR16_COPY() in this case.


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