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73 lines
2.6 KiB
73 lines
2.6 KiB
1 year ago
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From 94b5b99c96ad80e659ffa8dbe8045b65ab4cc791 Mon Sep 17 00:00:00 2001
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From: Eike Rathke <erack@redhat.com>
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Date: Fri, 17 Feb 2023 12:03:54 +0100
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Subject: [PATCH 2/3] Stack check safety belt before fishing in muddy waters
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Have it hit hard in debug builds.
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Change-Id: I9ea54844a0661fd7a75616a2876983a74b2d5bad
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Reviewed-on: https://gerrit.libreoffice.org/c/core/+/147205
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Reviewed-by: Eike Rathke <erack@redhat.com>
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Tested-by: Jenkins
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(cherry picked from commit 9d91fbba6f374fa1c10b38eae003da89bd4e6d4b)
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---
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sc/source/core/inc/interpre.hxx | 12 ++++++++++++
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sc/source/core/tool/interpr1.cxx | 4 ++--
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2 files changed, 14 insertions(+), 2 deletions(-)
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diff --git a/sc/source/core/inc/interpre.hxx b/sc/source/core/inc/interpre.hxx
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index 4e986daf8453..3bcc9ef19fc2 100644
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--- a/sc/source/core/inc/interpre.hxx
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+++ b/sc/source/core/inc/interpre.hxx
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@@ -235,6 +235,7 @@ private:
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inline bool MustHaveParamCount( short nAct, short nMust );
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inline bool MustHaveParamCount( short nAct, short nMust, short nMax );
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inline bool MustHaveParamCountMin( short nAct, short nMin );
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+ inline bool MustHaveParamCountMinWithStackCheck( short nAct, short nMin );
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void PushParameterExpected();
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void PushIllegalParameter();
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void PushIllegalArgument();
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@@ -1089,6 +1090,17 @@ inline bool ScInterpreter::MustHaveParamCountMin( short nAct, short nMin )
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return false;
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}
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+inline bool ScInterpreter::MustHaveParamCountMinWithStackCheck( short nAct, short nMin )
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+{
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+ assert(sp >= nAct);
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+ if (sp < nAct)
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+ {
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+ PushParameterExpected();
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+ return false;
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+ }
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+ return MustHaveParamCountMin( nAct, nMin);
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+}
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+
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inline bool ScInterpreter::CheckStringPositionArgument( double & fVal )
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{
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if (!std::isfinite( fVal))
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diff --git a/sc/source/core/tool/interpr1.cxx b/sc/source/core/tool/interpr1.cxx
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index 4f2789160a1c..5e2f36685024 100644
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--- a/sc/source/core/tool/interpr1.cxx
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+++ b/sc/source/core/tool/interpr1.cxx
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@@ -7547,7 +7547,7 @@ void ScInterpreter::ScVLookup()
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void ScInterpreter::ScSubTotal()
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{
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sal_uInt8 nParamCount = GetByte();
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- if ( !MustHaveParamCountMin( nParamCount, 2 ) )
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+ if ( !MustHaveParamCountMinWithStackCheck( nParamCount, 2 ) )
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return;
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// We must fish the 1st parameter deep from the stack! And push it on top.
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@@ -7594,7 +7594,7 @@ void ScInterpreter::ScSubTotal()
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void ScInterpreter::ScAggregate()
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{
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sal_uInt8 nParamCount = GetByte();
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- if ( !MustHaveParamCountMin( nParamCount, 3 ) )
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+ if ( !MustHaveParamCountMinWithStackCheck( nParamCount, 3 ) )
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return;
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const FormulaError nErr = nGlobalError;
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--
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2.41.0
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