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Date: Wed, 13 Apr 2022 14:21:29 +0800 From: Liu Jian <liujian56@...wei.com> To: <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>, <kafai@...com>, <songliubraving@...com>, <yhs@...com>, <john.fastabend@...il.com>, <kpsingh@...nel.org>, <davem@...emloft.net>, <kuba@...nel.org>, <sdf@...gle.com>, <netdev@...r.kernel.org>, <bpf@...r.kernel.org> CC: <liujian56@...wei.com> Subject: [PATCH bpf v2 0/2] Enlarge offset check value in bpf_skb_load_bytes The data length of skb frags + frag_list may be greater than 0xffff, and skb_header_pointer can not handle negative offset and negative len. So here INT_MAX is used to check the validity of offset and len. And add the test case for the change. Liu Jian (2): net: Enlarge offset check value from 0xffff to INT_MAX in bpf_skb_load_bytes selftests: bpf: add test for skb_load_bytes net/core/filter.c | 4 +- .../selftests/bpf/prog_tests/skb_load_bytes.c | 45 +++++++++++++++++++ .../selftests/bpf/progs/skb_load_bytes.c | 19 ++++++++ 3 files changed, 66 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/skb_load_bytes.c create mode 100644 tools/testing/selftests/bpf/progs/skb_load_bytes.c -- 2.17.1
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