[lwip-devel] [bug #41009] IPv6 reassembly broken on 64-bit platforms

[Valery Ushakov]

URL:
  <http://savannah.nongnu.org/bugs/?41009>

                 Summary: IPv6 reassembly broken on 64-bit platforms
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: uwe
            Submitted on: Fri 27 Dec 2013 01:28:31 AM GMT
                Category: IPv6
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: git head

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Details:

struct ip6_reass_helper "replaces the Fragment Header in memory in
incoming fragments".  Unfortunately, it contains struct pbuf
*next_pbuf pointer, so on 64-bit platforms that struct is larger than
struct ip6_frag_hdr and reassembly code overwrites the first 4 bytes
of each fragment.





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