iproute_lwtunnel: Argument to strerror must be positive

Signed-off-by: Phil Sutter <phil@nwl.cc>

diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index 5c0c7d110d23e07f72ec55d1f6d6d51d2fe71f8c..e8cd505abab2b6f2b6436da555f3903ee6d9eb09 100644 (file)
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -642,7 +642,7 @@ static int lwt_parse_bpf(struct rtattr *rta, size_t len,
        err = bpf_parse_common(bpf_type, &cfg, &bpf_cb_ops, &x);
        if (err < 0) {
                fprintf(stderr, "Failed to parse eBPF program: %s\n",
-                       strerror(err));
+                       strerror(-err));
                return -1;
        }
        rta_nest_end(rta, nest);