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Don't allow overflowing lengths in WM_COPYDATA (#20185)

It is possible to craft a packet whose `len` is `0x80000001`.

We should not produce values that do not fit in size_t (on e.g. x86).

Reject them summarily.

Dustin L. Howett committed 3mo ago

8edac5fb12f9e7c21a88cf3d1617817ad0fdecc6

Parent: dbc5177

Committed by GitHub <noreply@github.com> on 5/5/2026, 7:19:25 PM