Re: 14.3 panics: supervisor write data, page not present

From: J.R. Oldroyd <fbsd_at_opal.com>
Date: Fri, 05 Sep 2025 17:20:07 UTC 
On Thu, 4 Sep 2025 09:11:53 -0400 "J.R. Oldroyd" <fbsd@opal.com> wrote:
>
> Well, even with locally compiled kernel AND now also with the suggested
> microcode update in place, this system continues to panic after 1-3 days
> of uptime.  As noted before, this never happened on 14.2 or many earlier
> kernels.
> 
> 	-jr
> 
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 2; apic id = 04
> fault virtual address	= 0x3b
> fault code		= supervisor write data, page not present
> instruction pointer	= 0x20:0xffffffff80d2c1af
> stack pointer	        = 0x28:0xfffffe00c5ea9c80
> frame pointer	        = 0x28:0xfffffe00c5ea9cc0

Additional info:

(kgdb) list *0xffffffff80d2c1af
0xffffffff80d2c1af is in tcp_hc_update (../../../netinet/tcp_hostcache.c:533).
528			}
529	
530			/*
531			 * Initialize basic information of hostcache entry.
532			 */
533			bzero(hc_entry, sizeof(*hc_entry));
534			if (inc->inc_flags & INC_ISIPV6) {
535				hc_entry->ip6 = inc->inc6_faddr;
536				hc_entry->ip6_zoneid = inc->inc6_zoneid;
537			} else
(kgdb) bt
#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
#1  doadump (textdump=<optimized out>) at ../../../kern/kern_shutdown.c:405
#2  0xffffffff80b5a56b in kern_reboot (howto=260) at ../../../kern/kern_shutdown.c:523
#3  0xffffffff80b5aa69 in vpanic (fmt=0xffffffff811a02b2 "%s", ap=ap@entry=0xfffffe00c5ea9b40) at ../../../kern/kern_shutdown.c:967
#4  0xffffffff80b5a8a3 in panic (fmt=<unavailable>) at ../../../kern/kern_shutdown.c:891
#5  0xffffffff8104dbfa in trap_fatal (frame=<optimized out>, eva=<optimized out>) at ../../../amd64/amd64/trap.c:1000
#6  0xffffffff8104dbfa in trap_pfault (frame=0xfffffe00c5ea9bc0, usermode=false, signo=<optimized out>, ucode=<optimized out>)
#7  <signal handler called>
#8  tcp_hc_update (inc=inc@entry=0xfffff802777e6b0c, hcml=hcml@entry=0xfffffe00c5ea9cd4) at ../../../netinet/tcp_hostcache.c:533
#9  0xffffffff80d4122f in tcp_discardcb (tp=tp@entry=0xfffff802777e6a80) at ../../../netinet/tcp_subr.c:2568
#10 0xffffffff80d4c6a4 in tcp_usr_detach (so=<optimized out>) at ../../../netinet/tcp_usrreq.c:216
#11 0xffffffff80c000c9 in sofree (so=0xfffff803c12bd000) at ../../../kern/uipc_socket.c:1859
#12 sorele_locked (so=so@entry=0xfffff803c12bd000) at ../../../kern/uipc_socket.c:1886
#13 0xffffffff80d41040 in tcp_close (tp=tp@entry=0xfffff802777e6a80) at ../../../netinet/tcp_subr.c:2610
#14 0xffffffff80d4b00b in tcp_timer_2msl (tp=0xfffff802777e6a80) at ../../../netinet/tcp_timer.c:373
#15 0xffffffff80d4a074 in tcp_timer_enter (xtp=0xfffff802777e6a80) at ../../../netinet/tcp_timer.c:882
#16 0xffffffff80b78c79 in softclock_call_cc (c=0xfffff802777e6c18, cc=cc@entry=0xffffffff83929300, direct=direct@entry=0) at ../../../kern/kern_timeout.c:719
#17 0xffffffff80b7a445 in softclock_thread (arg=arg@entry=0xffffffff83929300) at ../../../kern/kern_timeout.c:858
#18 0xffffffff80b13641 in fork_exit (callout=0xffffffff80b7a360 <softclock_thread>, arg=0xffffffff83929300, frame=0xfffffe00c5ea9f40) at ../../../kern/kern_fork.c:1153
#19 <signal handler called>
#20 0x1929192818381839 in ?? ()
Backtrace stopped: Cannot access memory at address 0x228c339c229d239c