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(parent: 8589e92) | patch
bpf: Move skb->len == 0 checks into __bpf_redirect
authorStanislav Fomichev <sdf@google.com>
Mon, 21 Nov 2022 18:03:39 +0000 (10:03 -0800)
committerMartin KaFai Lau <martin.lau@kernel.org>
Mon, 21 Nov 2022 20:47:04 +0000 (12:47 -0800)
commit114039b342014680911c35bd6b72624180fd669a
treed1daa22b3d367f3837bf0c2a939b439b61723978tree | snapshot
parent8589e92675aa4727bede3f9230709624619844f3commit | diff
bpf: Move skb->len == 0 checks into __bpf_redirect

To avoid potentially breaking existing users.

Both mac/no-mac cases have to be amended; mac_header >= network_header
is not enough (verified with a new test, see next patch).

Fixes: fd1894224407 ("bpf: Don't redirect packets with invalid pkt_len")
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20221121180340.1983627-1-sdf@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
net/bpf/test_run.c diff | blob | history
net/core/filter.c diff | blob | history
Domain: System / Kernel;