ssl/statem/extensions_clnt.c:698: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - [`pkt->written`, `pkt->written` + 6]):unsigned64 by call to `add_key_share`.
Showing all 14 steps of the trace


ssl/statem/extensions_clnt.c:667:17: Call
665.               || !WPACKET_start_sub_packet_u16(pkt)
666.                  /* KeyShare list sub-packet */
667.               || !WPACKET_start_sub_packet_u16(pkt)) {
                       ^
668.           SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,
669.                    ERR_R_INTERNAL_ERROR);

ssl/packet.c:270:1: Parameter `pkt->buf->length`
  268.   }
  269.   
  270. > int WPACKET_start_sub_packet_len__(WPACKET *pkt, size_t lenbytes)
  271.   {
  272.       WPACKET_SUB *sub;

ssl/statem/extensions_clnt.c:698:10: Call
696.       }
697.   
698.       if (!add_key_share(s, pkt, curve_id)) {
                ^
699.           /* SSLfatal() already called */
700.           return EXT_RETURN_FAIL;

ssl/statem/extensions_clnt.c:595:1: Parameter `pkt->written`
  593.   
  594.   #ifndef OPENSSL_NO_TLS1_3
  595. > static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id)
  596.   {
  597.       unsigned char *encoded_point = NULL;

ssl/statem/extensions_clnt.c:628:10: Call
  626.   
  627.       /* Create KeyShareEntry */
  628.       if (!WPACKET_put_bytes_u16(pkt, curve_id)
                  ^
  629.               || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) {
  630.           SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,

ssl/packet.c:306:1: Parameter `pkt->written`
    304.   }
    305.   
    306. > int WPACKET_put_bytes__(WPACKET *pkt, unsigned int val, size_t size)
    307.   {
    308.       unsigned char *data;

ssl/packet.c:312:17: Call
    310.       /* Internal API, so should not fail */
    311.       if (!ossl_assert(size <= sizeof(unsigned int))
    312.               || !WPACKET_allocate_bytes(pkt, size, &data)
                           ^
    313.               || !put_value(data, val, size))
    314.           return 0;

ssl/packet.c:15:1: Parameter `pkt->written`
      13.   #define DEFAULT_BUF_SIZE    256
      14.   
      15. > int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
      16.   {
      17.       if (!WPACKET_reserve_bytes(pkt, len, allocbytes))

ssl/packet.c:17:10: Call
      15.   int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
      16.   {
      17.       if (!WPACKET_reserve_bytes(pkt, len, allocbytes))
                     ^
      18.           return 0;
      19.   

ssl/packet.c:39:1: <LHS trace>
37.                        ? (p)->staticbuf : (unsigned char *)(p)->buf->data)
38.   
39. > int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
40.   {
41.       /* Internal API, so should not fail */

ssl/packet.c:39:1: Parameter `pkt->buf->length`
        37.                        ? (p)->staticbuf : (unsigned char *)(p)->buf->data)
        38.   
        39. > int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
        40.   {
        41.       /* Internal API, so should not fail */

ssl/packet.c:39:1: <RHS trace>
37.                        ? (p)->staticbuf : (unsigned char *)(p)->buf->data)
38.   
39. > int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
40.   {
41.       /* Internal API, so should not fail */

ssl/packet.c:39:1: Parameter `len`
        37.                        ? (p)->staticbuf : (unsigned char *)(p)->buf->data)
        38.   
        39. > int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
        40.   {
        41.       /* Internal API, so should not fail */

ssl/packet.c:48:36: Binary operation: ([0, +oo] - [pkt->written, pkt->written + 6]):unsigned64 by call to `add_key_share` 
        46.           return 0;
        47.   
        48.       if (pkt->staticbuf == NULL && (pkt->buf->length - pkt->written < len)) {
                                                 ^
        49.           size_t newlen;
        50.           size_t reflen;

int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
{
    if (!ossl_assert(pkt->subs != NULL && len != 0))
        return 0;
    if (pkt->maxsize - pkt->written < len)
        return 0;
    if (pkt->staticbuf == NULL && (pkt->buf->length - pkt->written < len)) {
        size_t newlen;
        size_t reflen;
        reflen = (len > pkt->buf->length) ? len : pkt->buf->length;
        if (reflen > SIZE_MAX / 2) {
            newlen = SIZE_MAX;
        } else {
            newlen = reflen * 2;
            if (newlen < DEFAULT_BUF_SIZE)
                newlen = DEFAULT_BUF_SIZE;
        }
        if (BUF_MEM_grow(pkt->buf, newlen) == 0)
            return 0;
    }
    if (allocbytes != NULL)
        *allocbytes = WPACKET_get_curr(pkt);
    return 1;
}
['EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,\n                                        unsigned int context, X509 *x,\n                                        size_t chainidx)\n{\n#ifndef OPENSSL_NO_TLS1_3\n    size_t i, num_groups = 0;\n    const uint16_t *pgroups = NULL;\n    uint16_t curve_id = 0;\n    if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)\n            || !WPACKET_start_sub_packet_u16(pkt)\n            || !WPACKET_start_sub_packet_u16(pkt)) {\n        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,\n                 ERR_R_INTERNAL_ERROR);\n        return EXT_RETURN_FAIL;\n    }\n    tls1_get_supported_groups(s, &pgroups, &num_groups);\n    if (s->s3->group_id != 0) {\n        curve_id = s->s3->group_id;\n    } else {\n        for (i = 0; i < num_groups; i++) {\n            if (!tls_curve_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED))\n                continue;\n            curve_id = pgroups[i];\n            break;\n        }\n    }\n    if (curve_id == 0) {\n        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,\n                 SSL_R_NO_SUITABLE_KEY_SHARE);\n        return EXT_RETURN_FAIL;\n    }\n    if (!add_key_share(s, pkt, curve_id)) {\n        return EXT_RETURN_FAIL;\n    }\n    if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {\n        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,\n                 ERR_R_INTERNAL_ERROR);\n        return EXT_RETURN_FAIL;\n    }\n#endif\n    return EXT_RETURN_SENT;\n}', 'int WPACKET_start_sub_packet_len__(WPACKET *pkt, size_t lenbytes)\n{\n    WPACKET_SUB *sub;\n    unsigned char *lenchars;\n    if (!ossl_assert(pkt->subs != NULL))\n        return 0;\n    sub = OPENSSL_zalloc(sizeof(*sub));\n    if (sub == NULL)\n        return 0;\n    sub->parent = pkt->subs;\n    pkt->subs = sub;\n    sub->pwritten = pkt->written + lenbytes;\n    sub->lenbytes = lenbytes;\n    if (lenbytes == 0) {\n        sub->packet_len = 0;\n        return 1;\n    }\n    if (!WPACKET_allocate_bytes(pkt, lenbytes, &lenchars))\n        return 0;\n    sub->packet_len = lenchars - GETBUF(pkt);\n    return 1;\n}', 'static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id)\n{\n    unsigned char *encoded_point = NULL;\n    EVP_PKEY *key_share_key = NULL;\n    size_t encodedlen;\n    if (s->s3->tmp.pkey != NULL) {\n        if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) {\n            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,\n                     ERR_R_INTERNAL_ERROR);\n            return 0;\n        }\n        key_share_key = s->s3->tmp.pkey;\n    } else {\n        key_share_key = ssl_generate_pkey_group(s, curve_id);\n        if (key_share_key == NULL) {\n            return 0;\n        }\n    }\n    encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,\n                                                &encoded_point);\n    if (encodedlen == 0) {\n        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB);\n        goto err;\n    }\n    if (!WPACKET_put_bytes_u16(pkt, curve_id)\n            || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) {\n        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,\n                 ERR_R_INTERNAL_ERROR);\n        goto err;\n    }\n    s->s3->tmp.pkey = key_share_key;\n    s->s3->group_id = curve_id;\n    OPENSSL_free(encoded_point);\n    return 1;\n err:\n    if (s->s3->tmp.pkey == NULL)\n        EVP_PKEY_free(key_share_key);\n    OPENSSL_free(encoded_point);\n    return 0;\n}', 'int WPACKET_put_bytes__(WPACKET *pkt, unsigned int val, size_t size)\n{\n    unsigned char *data;\n    if (!ossl_assert(size <= sizeof(unsigned int))\n            || !WPACKET_allocate_bytes(pkt, size, &data)\n            || !put_value(data, val, size))\n        return 0;\n    return 1;\n}', 'int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)\n{\n    if (!WPACKET_reserve_bytes(pkt, len, allocbytes))\n        return 0;\n    pkt->written += len;\n    pkt->curr += len;\n    return 1;\n}', 'int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)\n{\n    if (!ossl_assert(pkt->subs != NULL && len != 0))\n        return 0;\n    if (pkt->maxsize - pkt->written < len)\n        return 0;\n    if (pkt->staticbuf == NULL && (pkt->buf->length - pkt->written < len)) {\n        size_t newlen;\n        size_t reflen;\n        reflen = (len > pkt->buf->length) ? len : pkt->buf->length;\n        if (reflen > SIZE_MAX / 2) {\n            newlen = SIZE_MAX;\n        } else {\n            newlen = reflen * 2;\n            if (newlen < DEFAULT_BUF_SIZE)\n                newlen = DEFAULT_BUF_SIZE;\n        }\n        if (BUF_MEM_grow(pkt->buf, newlen) == 0)\n            return 0;\n    }\n    if (allocbytes != NULL)\n        *allocbytes = WPACKET_get_curr(pkt);\n    return 1;\n}']