From 47db7804524066e74fd787bdd0d7f2ba8394c220 Mon Sep 17 00:00:00 2001 From: Even Rouault Date: Sun, 14 Apr 2019 20:11:17 +0200 Subject: lcc: avoid division by zero Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14250 Credit to OSS Fuzz --- src/projections/lcc.cpp | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'src/projections/lcc.cpp') diff --git a/src/projections/lcc.cpp b/src/projections/lcc.cpp index aca025be..a101009d 100644 --- a/src/projections/lcc.cpp +++ b/src/projections/lcc.cpp @@ -121,7 +121,12 @@ PJ *PROJECTION(lcc) { if( ml2 == 0 ) { return pj_default_destructor(P, PJD_ERR_LAT_1_OR_2_ZERO_OR_90); } - Q->n /= log(ml1 / ml2); + const double denom = log(ml1 / ml2); + if( denom == 0 ) { + // Not quite, but es is very close to 1... + return pj_default_destructor(P, PJD_ERR_INVALID_ECCENTRICITY); + } + Q->n /= denom; } Q->c = (Q->rho0 = m1 * pow(ml1, -Q->n) / Q->n); Q->rho0 *= (fabs(fabs(P->phi0) - M_HALFPI) < EPS10) ? 0. : -- cgit v1.2.3