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libbpf: Fix uninitialized warning in btf_dump_dump_type_data

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GCC 11.3.0 fails to compile btf_dump.c due to the following error,
which seems to originate in btf_dump_struct_data where the returned
value would be uninitialized if btf_vlen returns zero.

btf_dump.c: In function ‘btf_dump_dump_type_data’:
btf_dump.c:2363:12: error: ‘err’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 2363 |         if (err < 0)
      |            ^

Fixes: 920d16af9b ("libbpf: BTF dumper support for typed data")
Signed-off-by: David Michael <fedora.dm0@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Stanislav Fomichev <sdf@google.com>
Acked-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/bpf/87zgcu60hq.fsf@gmail.com
This commit is contained in:
David Michael 2022-11-13 15:52:17 -05:00 committed by Daniel Borkmann
parent f12ed9c048
commit dfd0afbf15
1 changed files with 1 additions and 1 deletions
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2
tools/lib/bpf/btf_dump.c
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@ -1989,7 +1989,7 @@ static int btf_dump_struct_data(struct btf_dump *d,
{
const struct btf_member *m = btf_members(t);
__u16 n = btf_vlen(t);
int i, err;
int i, err = 0;
/* note that we increment depth before calling btf_dump_print() below;
* this is intentional. btf_dump_data_newline() will not print a