ssl/statem/extensions_clnt.c:396: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - [`pkt->written`, `pkt->written` + 4]):unsigned64 by call to `WPACKET_sub_memcpy__`.
Showing all 14 steps of the trace


ssl/statem/extensions_clnt.c:395:17: Call
393.                   TLSEXT_TYPE_application_layer_protocol_negotiation)
394.                  /* Sub-packet ALPN extension */
395.               || !WPACKET_start_sub_packet_u16(pkt)
                       ^
396.               || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len)
397.               || !WPACKET_close(pkt)) {

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:396:17: Call
394.                  /* Sub-packet ALPN extension */
395.               || !WPACKET_start_sub_packet_u16(pkt)
396.               || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len)
                       ^
397.               || !WPACKET_close(pkt)) {
398.           SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ALPN,

ssl/packet.c:374:1: Parameter `pkt->written`
  372.   }
  373.   
  374. > int WPACKET_sub_memcpy__(WPACKET *pkt, const void *src, size_t len,
  375.                            size_t lenbytes)
  376.   {

ssl/packet.c:377:10: Call
  375.                            size_t lenbytes)
  376.   {
  377.       if (!WPACKET_start_sub_packet_len__(pkt, lenbytes)
                  ^
  378.               || !WPACKET_memcpy(pkt, src, len)
  379.               || !WPACKET_close(pkt))

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

ssl/packet.c:293:10: Call
    291.       }
    292.   
    293.       if (!WPACKET_allocate_bytes(pkt, lenbytes, &lenchars))
                    ^
    294.           return 0;
    295.       /* Convert to an offset in case the underlying BUF_MEM gets realloc'd */

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 + 4]):unsigned64 by call to `WPACKET_sub_memcpy__` 
        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_alpn(SSL *s, WPACKET *pkt, unsigned int context,\n                                   X509 *x, size_t chainidx)\n{\n    s->s3->alpn_sent = 0;\n    if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s))\n        return EXT_RETURN_NOT_SENT;\n    if (!WPACKET_put_bytes_u16(pkt,\n                TLSEXT_TYPE_application_layer_protocol_negotiation)\n            || !WPACKET_start_sub_packet_u16(pkt)\n            || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len)\n            || !WPACKET_close(pkt)) {\n        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ALPN,\n                 ERR_R_INTERNAL_ERROR);\n        return EXT_RETURN_FAIL;\n    }\n    s->s3->alpn_sent = 1;\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}', 'int WPACKET_sub_memcpy__(WPACKET *pkt, const void *src, size_t len,\n                         size_t lenbytes)\n{\n    if (!WPACKET_start_sub_packet_len__(pkt, lenbytes)\n            || !WPACKET_memcpy(pkt, src, len)\n            || !WPACKET_close(pkt))\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}']