Panic: Page Fault in Kernel: Yesterday's CURRENT

From: Larry Rosenman <ler_at_lerctr.org>
Date: Fri, 10 Dec 2021 16:24:05 UTC 
FreeBSD borg.lerctr.org 14.0-CURRENT FreeBSD 14.0-CURRENT #15 
main-n251537-ab639f2398b: Thu Dec  9 19:45:37 CST 2021     
root@borg.lerctr.org:/usr/obj/usr/src/amd64.amd64/sys/LER-MINIMAL  amd64

VMCORE *IS* available.




Unread portion of the kernel message buffer:
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 20
fault virtual address   = 0x0
fault code              = supervisor write data, page not present
instruction pointer     = 0x20:0xffffffff804e0db4
stack pointer           = 0x0:0xfffffe0434de4e10
frame pointer           = 0x0:0xfffffe0434de4e70
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 82990 (c++)
trap number             = 12
panic: page fault
cpuid = 0
time = 1639111198
KDB: stack backtrace:
#0 0xffffffff8050fc95 at kdb_backtrace+0x65
#1 0xffffffff804c468f at vpanic+0x17f
#2 0xffffffff804c4503 at panic+0x43
#3 0xffffffff807a2195 at trap_fatal+0x385
#4 0xffffffff807a21ef at trap_pfault+0x4f
#5 0xffffffff80779c78 at calltrap+0x8
#6 0xffffffff8045ddb8 at handleevents+0x188
#7 0xffffffff8045ea3e at timercb+0x24e
#8 0xffffffff807ca9eb at lapic_handle_timer+0x9b
#9 0xffffffff8077b9b1 at Xtimerint+0xb1
Uptime: 2h28m57s
Dumping 12829 out of 131023 
MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%

__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
55              __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" 
(offsetof(struct pcpu,
(kgdb) #0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=<optimized out>)
     at /usr/src/sys/kern/kern_shutdown.c:399
#2  0xffffffff804c428c in kern_reboot (howto=260)
     at /usr/src/sys/kern/kern_shutdown.c:487
#3  0xffffffff804c46fe in vpanic (fmt=0xffffffff807e1276 "%s",
     ap=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:920
#4  0xffffffff804c4503 in panic (fmt=<unavailable>)
     at /usr/src/sys/kern/kern_shutdown.c:844
#5  0xffffffff807a2195 in trap_fatal (frame=0xfffffe0434de4d50, eva=0)
     at /usr/src/sys/amd64/amd64/trap.c:946
#6  0xffffffff807a21ef in trap_pfault (frame=0xfffffe0434de4d50,
     usermode=false, signo=<optimized out>, ucode=<optimized out>)
     at /usr/src/sys/amd64/amd64/trap.c:765
#7  <signal handler called>
#8  0xffffffff804e0db4 in callout_process (now=now@entry=38385536922300)
     at /usr/src/sys/kern/kern_timeout.c:488
#9  0xffffffff8045ddb8 in handleevents (now=now@entry=38385536922300,
     fake=fake@entry=0) at /usr/src/sys/kern/kern_clocksource.c:213
#10 0xffffffff8045ea3e in timercb (et=0xffffffff80d475e0 <lapic_et>,
     arg=<optimized out>) at /usr/src/sys/kern/kern_clocksource.c:357
#11 0xffffffff807ca9eb in lapic_handle_timer (frame=0xfffffe0434de4f40)
     at /usr/src/sys/x86/x86/local_apic.c:1364
#12 <signal handler called>
#13 0x000000080df42bb6 in ?? ()
Backtrace stopped: Cannot access memory at address 0x7ffffdef2c90
(kgdb)

------------------------------------------------------------------------

-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640                 E-Mail: ler@lerctr.org
US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106