[lwip-devel] [bug #36388] PPP: checksum-only in last pbuf leads to pbuf with zero length

[Simon Goldschmidt]

URL:
  <http://savannah.nongnu.org/bugs/?36388>

                 Summary: PPP: checksum-only in last pbuf leads to pbuf with
zero length
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: goldsimon
            Submitted on: Do 03 Mai 2012 17:42:54 GMT
                Category: None
                Severity: 3 - Normal
              Item Group: Crash Error
                  Status: In Progress
                 Privacy: Public
             Assigned to: goldsimon
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

This is the PPP part of bug #36369: when the PPP checksum covers just the
first 2 bytes of the last pbuf, a zero length pbuf is created when checksum is
stripped from the input queue (in pppInProc()). This leads to crashes in other
parts of the stack where zero length pbufs are not handled correctly.




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