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GP-5869 Fix for some out of bounds array indices and shift amounts

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caheckman 2025-07-23 22:49:35 +00:00
parent 7426d4b685
commit 943ccd322d
17 changed files with 98 additions and 50 deletions
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10
Ghidra/Features/Decompiler/src/decompile/cpp/funcdata_varnode.cc
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@ -610,11 +610,17 @@ void Funcdata::setHighLevel(void)
/// Properties like boolean flags and \e consume bits are copied as appropriate.
/// \param vn is the existing Varnode
/// \param newVn is the new Varnode that has its properties set
/// \param lsbOffset is the significance offset of the new Varnode within the exising
/// \param lsbOffset is the significance offset of the new Varnode within the existing Varnode
void Funcdata::transferVarnodeProperties(Varnode *vn,Varnode *newVn,int4 lsbOffset)
{
uintb newConsume = (vn->getConsume() >> 8*lsbOffset) & calc_mask(newVn->getSize());
uintb newConsume = ~((uintb)0); // Make sure any bits shifted in above the precision of Varnode::consume are set
if (lsbOffset < sizeof(uintb)) {
uintb fillBits = 0;
if (lsbOffset != 0)
fillBits = newConsume << 8*(sizeof(uintb) - lsbOffset);
newConsume = ((vn->getConsume() >> 8*lsbOffset) | fillBits) & calc_mask(newVn->getSize());
}
uint4 vnFlags = vn->getFlags() & (Varnode::directwrite|Varnode::addrforce);