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| author | Even Rouault <even.rouault@spatialys.com> | 2019-04-25 19:17:32 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-04-25 19:17:32 +0200 |
| commit | 04e4f90f0278978c54b753379fca311e41543003 (patch) | |
| tree | 509a7d5bb01663fd500d42147877ddb30fe8e835 /src/projections/mod_ster.cpp | |
| parent | 4c7364ba84b97fc87270386906af66522feea94f (diff) | |
| parent | 9215789383f4f56a2d989a07bfcbddcaf7ee4736 (diff) | |
| download | PROJ-04e4f90f0278978c54b753379fca311e41543003.tar.gz PROJ-04e4f90f0278978c54b753379fca311e41543003.zip | |
Merge pull request #1443 from rouault/ossfuzz_14421
gs50 and other mod_ster projections: avoid divison by zero
Diffstat (limited to 'src/projections/mod_ster.cpp')
| -rw-r--r-- | src/projections/mod_ster.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/projections/mod_ster.cpp b/src/projections/mod_ster.cpp index b26ea289..50f66839 100644 --- a/src/projections/mod_ster.cpp +++ b/src/projections/mod_ster.cpp @@ -35,7 +35,12 @@ static PJ_XY e_forward (PJ_LP lp, PJ *P) { /* Ellipsoidal, forward */ pow((1. - esphi) / (1. + esphi), P->e * .5)) - M_HALFPI; schi = sin(chi); cchi = cos(chi); - s = 2. / (1. + Q->schio * schi + Q->cchio * cchi * coslon); + const double denom = 1. + Q->schio * schi + Q->cchio * cchi * coslon; + if( denom == 0 ) { + proj_errno_set(P, PJD_ERR_TOLERANCE_CONDITION); + return xy; + } + s = 2. / denom; p.r = s * cchi * sinlon; p.i = s * (Q->cchio * schi - Q->schio * cchi * coslon); p = pj_zpoly1(p, Q->zcoeff, Q->n); |