[Bug 260393] Page Fault tcp_output/tcp_input

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260393

--- Comment #73 from Dobri Dobrev <ddobrev85@gmail.com> ---
(In reply to Hans Petter Selasky from comment #72)

(kgdb) frame 14
#14 0xffffffff80e0607a in tcp_do_segment (m=<optimized out>,
th=0xfffff80bc659e87a, so=<optimized out>, tp=0xfffffe0252e24000,
drop_hdrlen=40, tlen=<optimized out>, iptos=0 '\000') at
/usr/src/sys/netinet/tcp_input.c:2822
2822                                                    tcp_sack_partialack(tp,
th);
(kgdb) print /x *(tp->t_inpcb->inp_socket->so_snd.sb_mb)
$7 = {{m_next = 0x0, m_slist = {sle_next = 0x0}, m_stailq = {stqe_next = 0x0}},
{m_nextpkt = 0x0, m_slistpkt = {sle_next = 0x0}, m_stailqpkt = {stqe_next =
0x0}}, m_data = 0xfffff8017874f000, m_len = 0x7cf, m_type = 0x1, 
  m_flags = 0x1, {{{m_pkthdr = {{snd_tag = 0x0, rcvif = 0x0}, tags = {slh_first
= 0x0}, len = 0x511, flowid = 0x0, csum_flags = 0x0, fibnum = 0x0, numa_domain
= 0xff, rsstype = 0x0, {rcv_tstmp = 0x0, {l2hlen = 0x0, 
              l3hlen = 0x0, l4hlen = 0x0, l5hlen = 0x0, inner_l2hlen = 0x0,
inner_l3hlen = 0x0, inner_l4hlen = 0x0, inner_l5hlen = 0x0}}, PH_per = {eight =
{0x0, 0x0, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0}, sixteen = {0x0, 0x0, 
              0xffff, 0x0}, thirtytwo = {0x0, 0xffff}, sixtyfour =
{0xffff00000000}, unintptr = {0xffff00000000}, ptr = 0xffff00000000}, PH_loc =
{eight = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, sixteen = {0x0, 0x0, 0x0, 
              0x0}, thirtytwo = {0x0, 0x0}, sixtyfour = {0x0}, unintptr =
{0x0}, ptr = 0x0}}, {m_epg_npgs = 0x0, m_epg_nrdy = 0x0, m_epg_hdrlen = 0x0,
m_epg_trllen = 0x0, m_epg_1st_off = 0x0, m_epg_last_len = 0x0, 
          m_epg_flags = 0x0, m_epg_record_type = 0x0, __spare = {0x0, 0x0},
m_epg_enc_cnt = 0x0, m_epg_tls = 0x511, m_epg_so = 0xff000000000000,
m_epg_seqno = 0x0, m_epg_stailq = {stqe_next = 0xffff00000000}}}, {m_ext = {{
            ext_count = 0x2, ext_cnt = 0xdeadc0de00000002}, ext_size = 0x800,
ext_type = 0x6, ext_flags = 0x1, {{ext_buf = 0xfffff8017874f000, ext_arg2 =
0x0}, {extpg_pa = {0xfffff8017874f000, 0x0, 0xdeadc0dedeadc0de, 
                0xdeadc0dedeadc0de, 0xdeadc0dedeadc0de}, extpg_trail = {0xde,
0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0,
0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 
                0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad,
0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde,
0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 
                0xde, 0xde, 0xc0, 0xad, 0xde}, extpg_hdr = {0xde, 0xc0, 0xad,
0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad, 0xde,
0xde, 0xc0, 0xad, 0xde, 0xde, 0xc0, 0xad}}}, ext_free = 0x0, 
          ext_arg1 = 0x0}, m_pktdat = 0xfffff80bc680b558}}, m_dat =
0xfffff80bc680b520}}
(kgdb)

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