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[INCLUDE] Safely handle odd & large lengths in ProbeAndCaptureUnicodeString.

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This commit is contained in:
Thomas Faber
2019-12-29 15:10:37 +01:00
parent 975e117780
commit 0d26bbf4b5
1 changed files with 12 additions and 1 deletions
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13
sdk/include/reactos/probe.h
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@@ -180,7 +180,18 @@ ProbeAndCaptureUnicodeString(OUT PUNICODE_STRING Dest,
/* Set it as the buffer */
Dest->Buffer = Buffer;
Dest->MaximumLength = Dest->Length + sizeof(WCHAR);
if (Dest->Length % sizeof(WCHAR))
{
Dest->Length--;
}
if (Dest->Length >= UNICODE_STRING_MAX_BYTES)
{
Dest->MaximumLength = Dest->Length;
}
else
{
Dest->MaximumLength = Dest->Length + sizeof(WCHAR);
}
}
else
{