[lwip-devel] [bug #51606] ip4_reass: Missing hole check when inserting pbuf in before another one

[Ambroz Bizjak]

URL:
  <http://savannah.nongnu.org/bugs/?51606>

                 Summary: ip4_reass: Missing hole check when inserting pbuf in
before another one
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: abizjak
            Submitted on: Fri 28 Jul 2017 04:14:00 PM UTC
                Category: IPv4
                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: git head

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Details:

http://git.savannah.gnu.org/cgit/lwip.git/tree/src/core/ipv4/ip4_frag.c?id=500598658df1d8674b7d25141983cf5452585d9d#n383

Where a pbuf is inserted before another one, there is no check if there is a
hole between the new one and the previous one. There should be a check similar
to line 437 where the new pbuf is inserted to the end.




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