From 57b429574ef92c62d202955535896b36845b88db Mon Sep 17 00:00:00 2001 From: paramat Date: Mon, 30 Nov 2015 01:43:28 +0000 Subject: [PATCH] Dungeongen: Fix rarely triggered segfault A segfault exposed a missing 'vm->m_area.contains()' check in makeCorridor that allowed the calculation of vm index for a node outside the vm area. The huge and invalid index number caused getContent to fail --- src/dungeongen.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/dungeongen.cpp b/src/dungeongen.cpp index bfaad9faa..cb5ea97b6 100644 --- a/src/dungeongen.cpp +++ b/src/dungeongen.cpp @@ -392,7 +392,8 @@ void DungeonGen::makeCorridor(v3s16 doorplace, v3s16 doordir, if (partcount != 0) p.Y += make_stairs; - if (vm->m_area.contains(p) && vm->m_area.contains(p + v3s16(0, 1, 0))) { + if (vm->m_area.contains(p) && vm->m_area.contains(p + v3s16(0, 1, 0)) && + vm->m_area.contains(v3s16(p.X - dir.X, p.Y - 1, p.Z - dir.Z))) { if (make_stairs) { makeFill(p + v3s16(-1, -1, -1), dp.holesize + v3s16(2, 3, 2),