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Bug 1360343 - ensure maskSurface is not null before dereference, since it can be null because of OOM or gfx device reset. r=dvander

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MozReview-Commit-ID: HX2qsWLZpMg

--HG--
extra : rebase_source : 046befc11151461a682842c31e2ce39247a5e1d8
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cku 2017-04-28 11:48:21 +08:00 • committed by Roy Tam
commit f9ae2860ab
2 changed files with 5 additions and 1 deletions
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3
layout/svg/nsSVGMaskFrame.cpp
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@ -274,7 +274,8 @@ nsSVGMaskFrame::GetMaskForMaskedFrame(gfxContext* aContext,
}
RefPtr<DataSourceSurface> maskSurface = maskSnapshot->GetDataSurface();
DataSourceSurface::MappedSurface map;
if (!maskSurface->Map(DataSourceSurface::MapType::READ, &map)) {
if (!maskSurface ||
!maskSurface->Map(DataSourceSurface::MapType::READ, &map)) {
return nullptr;
}