As a follow-up to the discussion about CVE-2019-3701 I walked through the can-gw code to add the support for handling CAN FD frames.
Patch 1/3 is still the CVE fix and can be omitted when a recent Linux tree is used that is already patched. Patch 2/3 and 3/3 introduce the CAN FD support. The updated user space tool 'cangw' can be found in the 'cangwfd' branch of my can-utils fork at https://github.com/hartkopp/can-utils . Feedback and testing is welcome! Oliver Hartkopp (3): can: gw: ensure DLC boundaries after CAN frame modification can: gw: use struct canfd_frame as internal data structure can: gw: add support for CAN FD frames include/uapi/linux/can/gw.h | 17 +- net/can/gw.c | 424 +++++++++++++++++++++++++++--------- 2 files changed, 333 insertions(+), 108 deletions(-) -- 2.20.1
