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9560 IPv4 packets in IPv6 ethernet frames panic debug builds
Reviewed by: Jorge Schrauwen <jorge@blackdot.be>
Reviewed by: Igor Kozhukhov <igor@dilos.org>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Ken Mays <maybird1776@yahoo.com>
Approved by: Gordon Ross <gordon.w.ross@gmail.com>
re #10173, rb4465 VLAN fanout stuck to one CPU


1772                 *indx = 0;
1773                 *type = OTH;
1774                 fanout_unaligned++;
1775                 return (0);
1776         }
1777 
1778         /*
1779          * Extract next-header, full header length, and source-hash value
1780          * using v4/v6 specific fields.
1781          */
1782         if (v6) {
1783                 remlen = ntohs(ip6h->ip6_plen);
1784                 nexthdr = ip6h->ip6_nxt;
1785                 src_val = V4_PART_OF_V6(ip6h->ip6_src);
1786                 dst_val = V4_PART_OF_V6(ip6h->ip6_dst);
1787                 /*
1788                  * Do src based fanout if below tunable is set to B_TRUE or
1789                  * when mac_ip_hdr_length_v6() fails because of malformed
1790                  * packets or because mblks need to be concatenated using
1791                  * pullupmsg().


1792                  */
1793                 if (!mac_ip_hdr_length_v6(ip6h, mp->b_wptr, &hdr_len, &nexthdr,

1794                     NULL)) {
1795                         goto src_dst_based_fanout;
1796                 }
1797         } else {
1798                 hdr_len = IPH_HDR_LENGTH(ipha);
1799                 remlen = ntohs(ipha->ipha_length) - hdr_len;
1800                 nexthdr = ipha->ipha_protocol;
1801                 src_val = (uint32_t)ipha->ipha_src;
1802                 dst_val = (uint32_t)ipha->ipha_dst;
1803                 /*
1804                  * Catch IPv4 fragment case here.  IPv6 has nexthdr == FRAG
1805                  * for its equivalent case.
1806                  */
1807                 if ((ntohs(ipha->ipha_fragment_offset_and_flags) &
1808                     (IPH_MF | IPH_OFFSET)) != 0) {
1809                         goto src_dst_based_fanout;
1810                 }
1811         }
1812         if (remlen < MIN_EHDR_LEN)
1813                 return (-1);




1772                 *indx = 0;
1773                 *type = OTH;
1774                 fanout_unaligned++;
1775                 return (0);
1776         }
1777 
1778         /*
1779          * Extract next-header, full header length, and source-hash value
1780          * using v4/v6 specific fields.
1781          */
1782         if (v6) {
1783                 remlen = ntohs(ip6h->ip6_plen);
1784                 nexthdr = ip6h->ip6_nxt;
1785                 src_val = V4_PART_OF_V6(ip6h->ip6_src);
1786                 dst_val = V4_PART_OF_V6(ip6h->ip6_dst);
1787                 /*
1788                  * Do src based fanout if below tunable is set to B_TRUE or
1789                  * when mac_ip_hdr_length_v6() fails because of malformed
1790                  * packets or because mblks need to be concatenated using
1791                  * pullupmsg().
1792                  *
1793                  * Perform a version check to prevent parsing weirdness...
1794                  */
1795                 if (IPH_HDR_VERSION(ip6h) != IPV6_VERSION ||
1796                     !mac_ip_hdr_length_v6(ip6h, mp->b_wptr, &hdr_len, &nexthdr,
1797                     NULL)) {
1798                         goto src_dst_based_fanout;
1799                 }
1800         } else {
1801                 hdr_len = IPH_HDR_LENGTH(ipha);
1802                 remlen = ntohs(ipha->ipha_length) - hdr_len;
1803                 nexthdr = ipha->ipha_protocol;
1804                 src_val = (uint32_t)ipha->ipha_src;
1805                 dst_val = (uint32_t)ipha->ipha_dst;
1806                 /*
1807                  * Catch IPv4 fragment case here.  IPv6 has nexthdr == FRAG
1808                  * for its equivalent case.
1809                  */
1810                 if ((ntohs(ipha->ipha_fragment_offset_and_flags) &
1811                     (IPH_MF | IPH_OFFSET)) != 0) {
1812                         goto src_dst_based_fanout;
1813                 }
1814         }
1815         if (remlen < MIN_EHDR_LEN)
1816                 return (-1);