Hi, We have run into issue reported in [0] when the XDP program has calls like: bpf_xdp_adjust_meta(ctx, -(int)sizeof(struct meta_data)) or bpf_xdp_adjust_tail(ctx, -1) < 0 xdp-loader is unable to load these XDP programs with verifier error message "Extension program changes packet data, while original does not", it seems to be triggered by the patches [1], removing these calls work around the issue. it appears another workaround is to bpf_xdp_adjust_meta(ctx, 0) after reading [1] thread? [0]: https://github.com/xdp-project/xdp-tools/issues/503 [1]: https://lore.kernel.org/all/20241210041100.1898468-1-eddyz87@xxxxxxxxx/ Vincent Thanks!
