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tools, bpftool: Avoid array index warnings.

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The bpf_caps array is shorter without CAP_BPF, avoid out of bounds reads
if this isn't defined. Working around this avoids -Wno-array-bounds with
clang.

Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20201027233646.3434896-1-irogers@google.com
This commit is contained in:
Ian Rogers 2020-10-27 16:36:45 -07:00 committed by Daniel Borkmann
parent e5e1a4bc91
commit 1e6f5dcc1b
1 changed files with 6 additions and 1 deletions
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7
tools/bpf/bpftool/feature.c
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@ -843,9 +843,14 @@ static int handle_perms(void)
else
p_err("missing %s%s%s%s%s%s%s%srequired for full feature probing; run as root or use 'unprivileged'",
capability_msg(bpf_caps, 0),
#ifdef CAP_BPF
capability_msg(bpf_caps, 1),
capability_msg(bpf_caps, 2),
capability_msg(bpf_caps, 3));
capability_msg(bpf_caps, 3)
#else
"", "", "", "", "", ""
#endif /* CAP_BPF */
);
goto exit_free;
}