1 files changed, 16 insertions, 0 deletions

diff --git a/net/core/filter.c b/net/core/filter.c
index 8659b40172d1..f9348806e843 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5774,6 +5774,7 @@ static bool sk_filter_is_valid_access(int off, int size,
 	case bpf_ctx_range_ptr(struct __sk_buff, flow_keys):
 	case bpf_ctx_range_till(struct __sk_buff, family, local_port):
 	case bpf_ctx_range(struct __sk_buff, tstamp):
+	case bpf_ctx_range(struct __sk_buff, wire_len):
 		return false;
 	}
 
@@ -5798,6 +5799,7 @@ static bool cg_skb_is_valid_access(int off, int size,
 	case bpf_ctx_range(struct __sk_buff, tc_classid):
 	case bpf_ctx_range(struct __sk_buff, data_meta):
 	case bpf_ctx_range_ptr(struct __sk_buff, flow_keys):
+	case bpf_ctx_range(struct __sk_buff, wire_len):
 		return false;
 	case bpf_ctx_range(struct __sk_buff, data):
 	case bpf_ctx_range(struct __sk_buff, data_end):
@@ -5844,6 +5846,7 @@ static bool lwt_is_valid_access(int off, int size,
 	case bpf_ctx_range(struct __sk_buff, data_meta):
 	case bpf_ctx_range_ptr(struct __sk_buff, flow_keys):
 	case bpf_ctx_range(struct __sk_buff, tstamp):
+	case bpf_ctx_range(struct __sk_buff, wire_len):
 		return false;
 	}
 
@@ -6274,6 +6277,7 @@ static bool sk_skb_is_valid_access(int off, int size,
 	case bpf_ctx_range(struct __sk_buff, data_meta):
 	case bpf_ctx_range_ptr(struct __sk_buff, flow_keys):
 	case bpf_ctx_range(struct __sk_buff, tstamp):
+	case bpf_ctx_range(struct __sk_buff, wire_len):
 		return false;
 	}
 
@@ -6361,6 +6365,7 @@ static bool flow_dissector_is_valid_access(int off, int size,
 	case bpf_ctx_range(struct __sk_buff, data_meta):
 	case bpf_ctx_range_till(struct __sk_buff, family, local_port):
 	case bpf_ctx_range(struct __sk_buff, tstamp):
+	case bpf_ctx_range(struct __sk_buff, wire_len):
 		return false;
 	}
 
@@ -6686,6 +6691,17 @@ static u32 bpf_convert_ctx_access(enum bpf_access_type type,
 					      bpf_target_off(struct sk_buff,
 							     tstamp, 8,
 							     target_size));
+		break;
+
+	case offsetof(struct __sk_buff, wire_len):
+		BUILD_BUG_ON(FIELD_SIZEOF(struct qdisc_skb_cb, pkt_len) != 4);
+
+		off = si->off;
+		off -= offsetof(struct __sk_buff, wire_len);
+		off += offsetof(struct sk_buff, cb);
+		off += offsetof(struct qdisc_skb_cb, pkt_len);
+		*target_size = 4;
+		*insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->src_reg, off);
 	}
 
 	return insn - insn_buf;