ssl/tls13_enc.c:125: error: BUFFER_OVERRUN_L3
  Offset added: [2, +oo] (⇐ [0, +oo] + 2) Size: [1, 2147483644] by call to `tls13_hkdf_expand`.
Showing all 12 steps of the trace


ssl/tls13_enc.c:125:12: Call
123.                       size_t ivlen)
124.   {
125.       return tls13_hkdf_expand(s, secret, ivlabel, sizeof(ivlabel) - 1, NULL,
                  ^
126.                                iv, ivlen);
127.   }

ssl/tls13_enc.c:30:1: Parameter `labellen`
  28.    * Returns 1 on success  0 on failure.
  29.    */
  30. > static int tls13_hkdf_expand(SSL *s, const unsigned char *secret,
  31.                                const unsigned char *label, size_t labellen,
  32.                                const unsigned char *hash,

ssl/tls13_enc.c:59:17: Call
  57.               || !WPACKET_start_sub_packet_u8(&pkt)
  58.               || !WPACKET_memcpy(&pkt, label_prefix, sizeof(label_prefix) - 1)
  59.               || !WPACKET_memcpy(&pkt, label, labellen)
                        ^
  60.               || !WPACKET_close(&pkt)
  61.               || !WPACKET_sub_memcpy_u8(&pkt, hash, (hash == NULL) ? 0 : hashlen)

ssl/packet.c:329:1: <Offset trace>
327.   }
328.   
329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
330.   {
331.       unsigned char *dest;

ssl/packet.c:329:1: Parameter `len`
    327.   }
    328.   
    329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
    330.   {
    331.       unsigned char *dest;

ssl/packet.c:329:1: <Length trace>
327.   }
328.   
329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
330.   {
331.       unsigned char *dest;

ssl/packet.c:329:1: Parameter `*pkt->buf->data`
    327.   }
    328.   
    329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
    330.   {
    331.       unsigned char *dest;

ssl/packet.c:336:10: Call
    334.           return 1;
    335.   
    336.       if (!WPACKET_allocate_bytes(pkt, len, &dest))
                    ^
    337.           return 0;
    338.   

ssl/packet.c:15:1: Parameter `**allocbytes`
      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: Parameter `**allocbytes`
        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:339:5: Array access: Offset added: [2, +oo] (⇐ [0, +oo] + 2) Size: [1, 2147483644] by call to `tls13_hkdf_expand` 
    337.           return 0;
    338.   
    339.       memcpy(dest, src, len);
               ^
    340.   
    341.       return 1;

int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
{
    unsigned char *dest;
    if (len == 0)
        return 1;
    if (!WPACKET_allocate_bytes(pkt, len, &dest))
        return 0;
    memcpy(dest, src, len);
    return 1;
}
['int tls13_derive_iv(SSL *s, const unsigned char *secret, unsigned char *iv,\n                    size_t ivlen)\n{\n    return tls13_hkdf_expand(s, secret, ivlabel, sizeof(ivlabel) - 1, NULL,\n                             iv, ivlen);\n}', 'static int tls13_hkdf_expand(SSL *s, const unsigned char *secret,\n                             const unsigned char *label, size_t labellen,\n                             const unsigned char *hash,\n                             unsigned char *out, size_t outlen)\n{\n    const unsigned char label_prefix[] = "TLS 1.3, ";\n    const EVP_MD *md = ssl_handshake_md(s);\n    EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);\n    int ret;\n    size_t hkdflabellen;\n    size_t hashlen;\n    unsigned char hkdflabel[sizeof(uint16_t) + sizeof(uint8_t) +\n                            + sizeof(label_prefix) + TLS13_MAX_LABEL_LEN\n                            + EVP_MAX_MD_SIZE];\n    WPACKET pkt;\n    if (pctx == NULL)\n        return 0;\n    hashlen = EVP_MD_size(md);\n    if (!WPACKET_init_static_len(&pkt, hkdflabel, sizeof(hkdflabel), 0)\n            || !WPACKET_put_bytes_u16(&pkt, outlen)\n            || !WPACKET_start_sub_packet_u8(&pkt)\n            || !WPACKET_memcpy(&pkt, label_prefix, sizeof(label_prefix) - 1)\n            || !WPACKET_memcpy(&pkt, label, labellen)\n            || !WPACKET_close(&pkt)\n            || !WPACKET_sub_memcpy_u8(&pkt, hash, (hash == NULL) ? 0 : hashlen)\n            || !WPACKET_get_total_written(&pkt, &hkdflabellen)\n            || !WPACKET_finish(&pkt)) {\n        WPACKET_cleanup(&pkt);\n        return 0;\n    }\n    ret = EVP_PKEY_derive_init(pctx) <= 0\n            || EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXPAND_ONLY)\n               <= 0\n            || EVP_PKEY_CTX_set_hkdf_md(pctx, md) <= 0\n            || EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, hashlen) <= 0\n            || EVP_PKEY_CTX_add1_hkdf_info(pctx, hkdflabel, hkdflabellen) <= 0\n            || EVP_PKEY_derive(pctx, out, &outlen) <= 0;\n    EVP_PKEY_CTX_free(pctx);\n    return ret == 0;\n}', 'int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)\n{\n    unsigned char *dest;\n    if (len == 0)\n        return 1;\n    if (!WPACKET_allocate_bytes(pkt, len, &dest))\n        return 0;\n    memcpy(dest, src, len);\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    assert(pkt->subs != NULL && len != 0);\n    if (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    *allocbytes = GETBUF(pkt) + pkt->curr;\n    return 1;\n}']