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libbpf: Deal with section with no data gracefully
ELF section data pointer returned by libelf may be NULL (if section has SHT_NOBITS), so null check section data pointer before attempting to copy license and kversion section. Fixes: cb1e5e9 ("bpf tools: Collect version and license from ELF sections") Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20221012022353.7350-3-shung-hsi.yu@suse.com
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