[Libreoffice-commits] core.git: sc/source

[Eike Rathke (via logerrit)]

 sc/source/core/inc/interpre.hxx  |   12 ++++++++++++
 sc/source/core/tool/interpr1.cxx |    4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

New commits:
commit 9d91fbba6f374fa1c10b38eae003da89bd4e6d4b
Author:     Eike Rathke <er...@redhat.com>
AuthorDate: Fri Feb 17 12:03:54 2023 +0100
Commit:     Eike Rathke <er...@redhat.com>
CommitDate: Fri Feb 17 17:04:46 2023 +0000

    Stack check safety belt before fishing in muddy waters
    
    Have it hit hard in debug builds.
    
    Change-Id: I9ea54844a0661fd7a75616a2876983a74b2d5bad
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/147205
    Reviewed-by: Eike Rathke <er...@redhat.com>
    Tested-by: Jenkins

diff --git a/sc/source/core/inc/interpre.hxx b/sc/source/core/inc/interpre.hxx
index 85d2955003af..a6bd98320f71 100644
--- a/sc/source/core/inc/interpre.hxx
+++ b/sc/source/core/inc/interpre.hxx
@@ -221,6 +221,7 @@ private:
     inline bool MustHaveParamCount( short nAct, short nMust );
     inline bool MustHaveParamCount( short nAct, short nMust, short nMax );
     inline bool MustHaveParamCountMin( short nAct, short nMin );
+    inline bool MustHaveParamCountMinWithStackCheck( short nAct, short nMin );
     void PushParameterExpected();
     void PushIllegalParameter();
     void PushIllegalArgument();
@@ -1074,6 +1075,17 @@ inline bool ScInterpreter::MustHaveParamCountMin( short 
nAct, short nMin )
     return false;
 }
 
+inline bool ScInterpreter::MustHaveParamCountMinWithStackCheck( short nAct, 
short nMin )
+{
+    assert(sp >= nAct);
+    if (sp < nAct)
+    {
+        PushParameterExpected();
+        return false;
+    }
+    return MustHaveParamCountMin( nAct, nMin);
+}
+
 inline bool ScInterpreter::CheckStringPositionArgument( double & fVal )
 {
     if (!std::isfinite( fVal))
diff --git a/sc/source/core/tool/interpr1.cxx b/sc/source/core/tool/interpr1.cxx
index 06bf2b44ed65..28523ff77a4a 100644
--- a/sc/source/core/tool/interpr1.cxx
+++ b/sc/source/core/tool/interpr1.cxx
@@ -7649,7 +7649,7 @@ void ScInterpreter::ScVLookup()
 void ScInterpreter::ScSubTotal()
 {
     sal_uInt8 nParamCount = GetByte();
-    if ( !MustHaveParamCountMin( nParamCount, 2 ) )
+    if ( !MustHaveParamCountMinWithStackCheck( nParamCount, 2 ) )
         return;
 
     // We must fish the 1st parameter deep from the stack! And push it on top.
@@ -7696,7 +7696,7 @@ void ScInterpreter::ScSubTotal()
 void ScInterpreter::ScAggregate()
 {
     sal_uInt8 nParamCount = GetByte();
-    if ( !MustHaveParamCountMin( nParamCount, 3 ) )
+    if ( !MustHaveParamCountMinWithStackCheck( nParamCount, 3 ) )
         return;
 
     const FormulaError nErr = nGlobalError;