selftests/bpf: Test bpf_skb_adjust_room on CHECKSUM_PARTIAL

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When the bpf_skb_adjust_room() shrinks the skb such that its csum_start
is invalid, the skb->ip_summed should be reset from CHECKSUM_PARTIAL to
CHECKSUM_NONE.

The commit 54c3f1a814 ("bpf: pull before calling skb_postpull_rcsum()")
fixed it.

This patch adds a test to ensure the skb->ip_summed changed from
CHECKSUM_PARTIAL to CHECKSUM_NONE after bpf_skb_adjust_room().

Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20221221185653.1589961-1-martin.lau@linux.dev

...

This commit is contained in:

Martin KaFai Lau 2022-12-21 10:56:53 -08:00 • committed by Daniel Borkmann

parent 54c3f1a814

commit 70a00e2f1d

4 changed files with 160 additions and 0 deletions

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1

tools/testing/selftests/bpf/DENYLIST.s390x

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85

tools/testing/selftests/bpf/prog_tests/decap_sanity.c

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6

tools/testing/selftests/bpf/progs/bpf_tracing_net.h

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68

tools/testing/selftests/bpf/progs/decap_sanity.c

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