Bug 91631

Summary: Clang static analysis of libtess shows undefined values and use of memory after free
Product: Mesa Reporter: Jonathan Liu <net147>
Component: GLUAssignee: mesa-dev
Status: RESOLVED MOVED QA Contact: mesa-dev
Severity: major    
Priority: medium CC: ajax, brianp, frederic.devernay
Version: git   
Hardware: All   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Jonathan Liu 2015-08-14 04:09:45 UTC 
Using static analyzer included in clang 3.6.2:
$ ./autogen.sh 
$ ./configure
$ scan-build make
  CC       src/libtess/dict.lo
  CC       src/libtess/geom.lo
  CC       src/libtess/memalloc.lo
  CC       src/libtess/mesh.lo
  CC       src/libtess/normal.lo
src/libtess/normal.c:112:6: warning: Assigned value is garbage or undefined
  v1 = minVert[i];
     ^ ~~~~~~~~~~
src/libtess/normal.c:113:6: warning: Assigned value is garbage or undefined
  v2 = maxVert[i];
     ^ ~~~~~~~~~~
2 warnings generated.
  CC       src/libtess/priorityq.lo
  CC       src/libtess/render.lo
  CC       src/libtess/sweep.lo
src/libtess/sweep.c:779:11: warning: Use of memory after it is freed
    if( ! regUp->dirty ) {
          ^~~~~~~~~~~~
src/libtess/sweep.c:803:10: warning: Use of memory after it is freed
          eLo = regLo->eUp;
                ^~~~~~~~~~
src/libtess/sweep.c:808:10: warning: Use of memory after it is freed
          eUp = regUp->eUp;
                ^~~~~~~~~~
3 warnings generated.
Comment 1 GitLab Migration User 2019-05-13 16:11:39 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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