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authorJohn Fastabend <john.fastabend@gmail.com>2020-01-11 06:12:05 +0000
committerDaniel Borkmann <daniel@iogearbox.net>2020-01-15 23:26:13 +0100
commit9aaaa56845a06aeabdd597cbe19492dc01f281ec (patch)
treeb2a5824d2c4f49e095b913aff1b19de29a79d72f /usr/Makefile
parentd468e4775c1c351616947ba0cccc43273963b9b5 (diff)
bpf: Sockmap/tls, skmsg can have wrapped skmsg that needs extra chaining
Its possible through a set of push, pop, apply helper calls to construct a skmsg, which is just a ring of scatterlist elements, with the start value larger than the end value. For example, end start |_0_|_1_| ... |_n_|_n+1_| Where end points at 1 and start points and n so that valid elements is the set {n, n+1, 0, 1}. Currently, because we don't build the correct chain only {n, n+1} will be sent. This adds a check and sg_chain call to correctly submit the above to the crypto and tls send path. Fixes: d3b18ad31f93d ("tls: add bpf support to sk_msg handling") Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/bpf/20200111061206.8028-8-john.fastabend@gmail.com
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