[Bug 286759] Fatal trap 12: page fault while in kernel mode - Melonax NIC on FreeBSD14.2

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286759

--- Comment #1 from Andrey V. Elsukov <ae@FreeBSD.org> ---
I found one 14.2 system, it seems it paniced after access to freed mbuf.

(kgdb) l *tcp_default_output+0x1201
0xffffffff80d1acf1 is in tcp_default_output
(/usr/src/sys/netinet/tcp_output.c:1087).
1082                     */
1083                    mb = sbsndptr_noadv(&so->so_snd, off, &moff);
1084                    if (len <= MHLEN - hdrlen - max_linkhdr && !hw_tls) {
1085                            m_copydata(mb, moff, len,
1086                                mtod(m, caddr_t) + hdrlen);
1087                            if (SEQ_LT(tp->snd_nxt, tp->snd_max))
1088                                    sbsndptr_adv(&so->so_snd, mb, len);
1089                            m->m_len += len;
1090                    } else {
1091                            if (SEQ_LT(tp->snd_nxt, tp->snd_max))
(kgdb) p/x offsetof(struct mbuf, m_len)
$5 = 0x18

kernel: fault virtual address   = 0x18

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