[Bug 260393] Page Fault tcp_output/tcp_input

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

--- Comment #15 from Dobri Dobrev <ddobrev85@gmail.com> ---
(In reply to Michael Tuexen from comment #14)

(kgdb) frame 9
#9  0xffffffff80dd5fa9 in tcp_output (tp=<optimized out>) at
/usr/src/sys/netinet/tcp_output.c:1081
1081                            m_copydata(mb, moff, len,
(kgdb) print mb
$1 = (struct mbuf *) 0xfffff8010ee80d00
(kgdb) print *mb
$2 = {{m_next = 0x0, m_slist = {sle_next = 0x0}, m_stailq = {stqe_next = 0x0}},
{m_nextpkt = 0x0, m_slistpkt = {sle_next = 0x0}, m_stailqpkt = {stqe_next =
0x0}}, 
  m_data = 0xfffff8015b91e528
"&i\365\267\254\350s\352,\025\216*\265\216\004\024\201j\256\245?\225<\020)W\214%\212\371\221$\205s\277LE<\326\340\032\267\377\366\214\217\235\215^)1x\377\342\032\234Ƃ\217]\211\375\333h\361\212\320nE\024\370\330\325S8\272\001y\023\304;\016:\017\032kT5\323\300\f\245MJd\n\025W\352c\321\062)Pl{/\263\320>6\231\362x\305\311\031ö\vy\356&É\265\343;_\273`\272\005\205\315m(\353쁞\001\223\254\371\037]UN\357\202%\201\364\033\r\232G$-N\251\262#\264\204\375\t\321\036\203\241\254\274\314ز\252jŹc.k\217\224#\235\206\241U\262\a\215I\035&\253j3"...,
m_len = 24, m_type = 1, m_flags = 1, {{{m_pkthdr = {{snd_tag = 0x0, 
            rcvif = 0x0}, tags = {slh_first = 0x0}, len = 1337, flowid = 0,
csum_flags = 0, fibnum = 0, numa_domain = 255 '\377', rsstype = 0 '\000',
{rcv_tstmp = 0, {l2hlen = 0 '\000', l3hlen = 0 '\000', 
              l4hlen = 0 '\000', l5hlen = 0 '\000', inner_l2hlen = 0 '\000',
inner_l3hlen = 0 '\000', inner_l4hlen = 0 '\000', inner_l5hlen = 0 '\000'}},
PH_per = {eight = "\000\000\000\000\377\377\000", sixteen = {
              0, 0, 65535, 0}, thirtytwo = {0, 65535}, sixtyfour =
{281470681743360}, unintptr = {281470681743360}, ptr = 0xffff00000000}, PH_loc
= {eight = "\000\000\000\000\000\000\000", sixteen = {0, 0, 0, 0}, 
            thirtytwo = {0, 0}, sixtyfour = {0}, unintptr = {0}, ptr = 0x0}},
{m_epg_npgs = 0 '\000', m_epg_nrdy = 0 '\000', m_epg_hdrlen = 0 '\000',
m_epg_trllen = 0 '\000', m_epg_1st_off = 0, m_epg_last_len = 0, 
          m_epg_flags = 0 '\000', m_epg_record_type = 0 '\000', __spare =
"\000", m_epg_enc_cnt = 0, m_epg_tls = 0x539, m_epg_so = 0xff000000000000,
m_epg_seqno = 0, m_epg_stailq = {stqe_next = 0xffff00000000}}}, {
        m_ext = {{ext_count = 1, ext_cnt = 0x1}, ext_size = 2048, ext_type = 6,
ext_flags = 1, {{ext_buf = 0xfffff8015b91e000
"\023\367\265R\030\254\212\342\220\255\331'\206\217\245f\223o\aH\205\277\222", 
              ext_arg2 = 0x0}, {extpg_pa = {18446735283447783424, 0, 0, 0, 0},
extpg_trail = '\000' <repeats 63 times>, extpg_hdr = '\000' <repeats 22
times>}}, ext_free = 0x0, ext_arg1 = 0x0}, 
        m_pktdat = 0xfffff8010ee80d58 "\001"}}, m_dat = 0xfffff8010ee80d20 ""}}
(kgdb) print moff
$3 = 0
(kgdb) print len
$4 = 1
(kgdb)

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