[quake3-bugzilla] [Bug 4893] New: [botlib] AAS_PredictRoute segfaults reported in oa_dm1

[bugzilla-daemon at icculus.org]

https://bugzilla.icculus.org/show_bug.cgi?id=4893

           Summary: [botlib] AAS_PredictRoute segfaults reported in oa_dm1
           Product: ioquake3
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Misc
        AssignedTo: zakk at icculus.org
        ReportedBy: smcv-ioquake3 at pseudorandom.co.uk
         QAContact: quake3-bugzilla at icculus.org


Created attachment 2577
  --> https://bugzilla.icculus.org/attachment.cgi?id=2577
backtrace for a crash at botlib/be_aas_route.c:1863

A couple of segfaults have been reported in Debian's patched ioquake3-server
when playing the OpenArena map oa_dm1. Our patches don't touch botlib (apart
from some spelling fixes applied in r1853), so these backtraces are probably
equally applicable to ioquake3; attaching them here before I work on this
myself.

>From a cursory look at one of the backtraces, the local variables in
BotDeathmatchAI and BotAI look quite scrambled; this might just be from
optimization, or it might be a bug in OpenArena's code/game/ leading to bad
arguments to AAS_PredictRoute. If the latter, then not checking arguments for
validity would still be an engine bug.

This is Debian bug <http://bugs.debian.org/607178>.

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