[gnutls-devel] GnuTLS | gnutls_buffer_append_data: avoid use-after-free in the callers (!1399)

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Merge request https://gitlab.com/gnutls/gnutls/-/merge_requests/1399 was reviewed by Anderson Sasaki

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Anderson Sasaki commented on a discussion on lib/ext/key_share.c: https://gitlab.com/gnutls/gnutls/-/merge_requests/1399#note_525521960

>  
>  		ret =
>  		    _gnutls_buffer_append_prefix(extdata, 16, 0);

OK, thanks for the clarification!

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Anderson Sasaki commented on a discussion on lib/ext/key_share.c: https://gitlab.com/gnutls/gnutls/-/merge_requests/1399#note_525521961

>  		/* copy actual length */
> -		_gnutls_write_uint16(extdata->length - cur_length, lengthp);
> +		_gnutls_write_uint16(extdata->length - length_pos - 2,

OK!

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Anderson Sasaki commented on a discussion on lib/ext/pre_shared_key.c: https://gitlab.com/gnutls/gnutls/-/merge_requests/1399#note_525521963

> +		gnutls_datum_t client_hello;
> +
> +		client_hello.data = extdata->data+sizeof(mbuffer_st);

I think this is clear now.

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Anderson Sasaki commented on a discussion on lib/ext/key_share.c: https://gitlab.com/gnutls/gnutls/-/merge_requests/1399#note_525521965

>  
> -		/* write the total length later */
> -		lengthp = &extdata->data[extdata->length];

OK!


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