From: David Michael fedora.dm0@gmail.com
commit dfd0afbf151d85411b371e841f62b81ee5d1ca54 upstream.
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: 920d16af9b42 ("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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/lib/bpf/btf_dump.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/lib/bpf/btf_dump.c +++ b/tools/lib/bpf/btf_dump.c @@ -1963,7 +1963,7 @@ static int btf_dump_struct_data(struct b { 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