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

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Thomas Faber 2019-12-29 15:10:37 +01:00
parent 975e117780
commit 0d26bbf4b5
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1 changed files with 12 additions and 1 deletions
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11
sdk/include/reactos/probe.h
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@ -180,8 +180,19 @@ ProbeAndCaptureUnicodeString(OUT PUNICODE_STRING Dest,
/* Set it as the buffer */ /* Set it as the buffer */
Dest->Buffer = Buffer; Dest->Buffer = Buffer;
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); Dest->MaximumLength = Dest->Length + sizeof(WCHAR);
} }
}
else else
{ {
/* Sanitize structure */ /* Sanitize structure */