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(parent: 53dd98f) | patch
xdp: XDP_REDIRECT should check IFF_UP and MTU
authorToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Fri, 6 Jul 2018 02:49:00 +0000 (11:49 +0900)
committerAlexei Starovoitov <ast@kernel.org>
Sat, 7 Jul 2018 22:25:35 +0000 (15:25 -0700)
commitaf7363f6fa3a899710973ad1667d18b1e1137200
tree57cdc7f8d2c55996b0ca1b6e74a8de8fa997b29ftree | snapshot
parent53dd98fa6a2a9033aa59e1cac1ca6731c59698d3commit | diff
xdp: XDP_REDIRECT should check IFF_UP and MTU

Otherwise we end up with attempting to send packets from down devices
or to send oversized packets, which may cause unexpected driver/device
behaviour. Generic XDP has already done this check, so reuse the logic
in native XDP.

Fixes: 741e6de4fcb9 ("xdp: add bpf_redirect helper function")
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
include/linux/filter.h diff | blob | history
kernel/bpf/devmap.c diff | blob | history
net/core/filter.c diff | blob | history
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