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kernel32: Lock heap and validate pointer in LocalHandle.

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Rémi Bernon 2022-11-12 14:27:44 +01:00 committed by Alexandre Julliard
parent d918919de0
commit c7eb844ce0
1 changed files with 6 additions and 2 deletions
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8
dlls/kernel32/heap.c
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@ -343,6 +343,7 @@ UINT WINAPI LocalFlags( HLOCAL handle )
*/
HLOCAL WINAPI LocalHandle( const void *ptr )
{
HANDLE heap = GetProcessHeap();
HLOCAL handle = (HANDLE)ptr;
ULONG flags;
@ -354,11 +355,14 @@ HLOCAL WINAPI LocalHandle( const void *ptr )
return 0;
}
if (!RtlGetUserInfoHeap( GetProcessHeap(), 0, (void *)ptr, &handle, &flags ))
RtlLockHeap( heap );
if (!HeapValidate( heap, HEAP_NO_SERIALIZE, ptr ) ||
!RtlGetUserInfoHeap( heap, HEAP_NO_SERIALIZE, (void *)ptr, &handle, &flags ))
{
SetLastError( ERROR_INVALID_HANDLE );
return 0;
handle = 0;
}
RtlUnlockHeap( heap );
return handle;
}