libbpf: avoid overflow in BTF.ext bounds check - #8694
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An invalid BTF.ext subsection length can wrap the pointer addition used by btf_ext_parse_sec_info() on 32-bit builds. The wrapped pointer passes the bounds check and parsing then reads beyond the copied BTF.ext data. Validate the offset and length with subtraction before forming the section pointer. Fixes: ae4ab4b ("btf: expose API to work with raw btf_ext data") Closes: https://issues.oss-fuzz.com/issues/477315119 Signed-off-by: Darren Carreras <carrerasdarren@gmail.com>
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Pull request for series with
subject: libbpf: avoid overflow in BTF.ext bounds check
version: 5
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1143700