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libbpf: Fix NULL pointer exception in API btf_dump__dump_type_data

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We found that function btf_dump__dump_type_data can be called by the
user as an API, but in this function, the `opts` parameter may be used
as a null pointer.This causes `opts->indent_str` to trigger a NULL
pointer exception.

Fixes: 2ce8450ef5 ("libbpf: add bpf_object__open_{file, mem} w/ extensible opts")
Signed-off-by: Xin Liu <liuxin350@huawei.com>
Signed-off-by: Weibin Kong <kongweibin2@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220917084809.30770-1-liuxin350@huawei.com
This commit is contained in:
Xin Liu 2022-09-17 16:48:09 +08:00 committed by Andrii Nakryiko
parent bc069da65e
commit 7620bffbf7
1 changed files with 1 additions and 1 deletions
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2
tools/lib/bpf/btf_dump.c
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@ -2385,7 +2385,7 @@ int btf_dump__dump_type_data(struct btf_dump *d, __u32 id,
d->typed_dump->indent_lvl = OPTS_GET(opts, indent_level, 0);
/* default indent string is a tab */
if (!opts->indent_str)
if (!OPTS_GET(opts, indent_str, NULL))
d->typed_dump->indent_str[0] = '\t';
else
libbpf_strlcpy(d->typed_dump->indent_str, opts->indent_str,