[Bug 276270] idle system crashed in udp6_bind()

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276270

            Bug ID: 276270
           Summary: idle system crashed in udp6_bind()
           Product: Base System
           Version: 14.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: rmf@lookhere.com

Just updated to 14.0-RELEASE yesterday.   Took a nap and came back and the
system was at a login screen.   It was updated from 13.2-RELEASE-p8.

Here is the stack dump - some added info - ipv6 is not configured (or at least,
it's just at default), and it runs a webserver that has 80/443 port forwarded
from the internet from a router:

Reading symbols from /boot/kernel/kernel...
Reading symbols from /usr/lib/debug//boot/kernel/kernel.debug...

Unread portion of the kernel message buffer:
rax: fffff802078f4000 rbx: fffff80337b301c0 rbp: fffffe01aa3eacf0
r10: 0000000000000000 r11: fffffe01aa4d8540 r12: fffff804567cc820
r13: 000000000000eff2 r14: 000000000000eff2 r15: fffff801768b1600
trap number             = 12
panic: page fault
cpuid = 6
time = 1705044321
KDB: stack backtrace:
#0 0xffffffff80b9009d at kdb_backtrace+0x5d
#1 0xffffffff80b431a2 at vpanic+0x132
#2 0xffffffff80b43063 at panic+0x43
#3 0xffffffff8100c85c at trap_fatal+0x40c
#4 0xffffffff8100c8af at trap_pfault+0x4f
#5 0xffffffff80fe3a38 at calltrap+0x8
#6 0xffffffff80d6cb4c at udp6_bind+0x13c
#7 0xffffffff80be61b2 at sobind+0x32
#8 0xffffffff80bed645 at kern_bindat+0xc5
#9 0xffffffff80bed4db at sys_bind+0x9b
#10 0xffffffff8100d119 at amd64_syscall+0x109
#11 0xffffffff80fe434b at fast_syscall_common+0xf8
Uptime: 4h43m21s
Dumping 1751 out of 32617 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%

__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57

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