Handle *all* protocol qualifiers in gen_host() - even link/tr/etc.

We missed that one.

Credit to OSS-Fuzz for finding this issue.

1 files changed, 3 insertions, 0 deletions

diff --git a/gencode.c b/gencode.c
index 536c73d2..33d81d82 100644
--- a/gencode.c
+++ b/gencode.c
@@ -4814,6 +4814,9 @@ gen_host(compiler_state_t *cstate, bpf_u_int32 addr, bpf_u_int32 mask,
 		}
 		return b0;
 
+	case Q_LINK:
+		bpf_error(cstate, "link-layer modifier applied to %s", typestr);
+
 	case Q_IP:
 		return gen_hostop(cstate, addr, mask, dir, ETHERTYPE_IP, 12, 16);