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[NTOBJSHEX] Return early from GetInfoFromPidl when pcidl is null in LPCITEMIDLIST (#4946)

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This fixes a crash when attempting to drag-n-drop items from NTObject Namespace and System Registry.
CORE-18480, CORE-18481
This commit is contained in:
Muthu R Kumar 2022-12-31 07:53:02 -08:00 committed by GitHub
parent d395c30967
commit 7fff96e7fe
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 12 additions and 2 deletions
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7
dll/shellext/ntobjshex/ntobjfolder.cpp
View File

@ -516,8 +516,13 @@ BOOL CNtObjectFolder::IsFolder(const NtPidlEntry * info)
HRESULT CNtObjectFolder::GetInfoFromPidl(LPCITEMIDLIST pcidl, const NtPidlEntry ** pentry)
{
NtPidlEntry * entry = (NtPidlEntry*) &(pcidl->mkid);
if (!pcidl)
{
DbgPrint("PCIDL is NULL\n");
return E_INVALIDARG;
}
NtPidlEntry * entry = (NtPidlEntry*) &(pcidl->mkid);
if (entry->cb < sizeof(NtPidlEntry))
{
DbgPrint("PCIDL too small %l (required %l)\n", entry->cb, sizeof(NtPidlEntry));

7
dll/shellext/ntobjshex/regfolder.cpp
View File

@ -469,8 +469,13 @@ BOOL CRegistryFolder::IsFolder(const RegPidlEntry * info)
HRESULT CRegistryFolder::GetInfoFromPidl(LPCITEMIDLIST pcidl, const RegPidlEntry ** pentry)
{
RegPidlEntry * entry = (RegPidlEntry*) &(pcidl->mkid);
if (!pcidl)
{
DbgPrint("PCIDL is NULL\n");
return E_INVALIDARG;
}
RegPidlEntry * entry = (RegPidlEntry*) &(pcidl->mkid);
if (entry->cb < sizeof(RegPidlEntry))
{
DbgPrint("PCIDL too small %l (required %l)\n", entry->cb, sizeof(RegPidlEntry));