inet_diag: bc: read cgroup id only for full sockets

Fix bug introduced by commit b1f3e43dbfac ("inet_diag: add support for
cgroup filter").

Signed-off-by: Dmitry Yakunin <zeil@yandex-team.ru>
Reported-by: syzbot+ee80f840d9bf6893223b@syzkaller.appspotmail.com
Reported-by: syzbot+13bef047dbfffa5cd1af@syzkaller.appspotmail.com
Fixes: b1f3e43dbfac ("inet_diag: add support for cgroup filter")
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed