Validate USB CDC port request terms before dispatch#2363
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The rp2 and stm32 usb_cdc drivers indexed the $gen_call request term as a tuple without checking its shape, so an immediate could be dereferenced as a boxed pointer. Validate tuple and arity before indexing, and harden the rp2 create_port OOM path to unwind instead of aborting. Signed-off-by: Paul Guyot <pguyot@kallisys.net>
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The rp2 and stm32 usb_cdc drivers indexed the $gen_call request term as a tuple without checking its shape, so an immediate could be dereferenced as a boxed pointer. Validate tuple and arity before indexing, and harden the rp2 create_port OOM path to unwind instead of aborting.
These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).
SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later