[Bug 238012] loading ipsec(4) ko causes panic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=238012

            Bug ID: 238012
           Summary: loading ipsec(4) ko causes panic
           Product: Base System
           Version: CURRENT
          Hardware: i386
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: lwhsu at FreeBSD.org

FreeBSD/i386 (Amnesiac) (ttyu0)                                                 

FreeBSD 13.0-CURRENT r348007 GENERIC                                            

root@:~ # kldload ipsec

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x1cfe645c
fault code              = supervisor write data, page not present
instruction pointer     = 0x20:0x19aa417a
stack pointer           = 0x28:0x1a822858
frame pointer           = 0x28:0x1a82285c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 778 (kldload)
trap number             = 12
panic: page fault
cpuid = 0
time = 1558407144
KDB: stack backtrace:
db_trace_self_wrapper(69,10c84e00,1576b09,10c84e00,1a822674,...) at
db_trace_self_wrapper+0x2a/frame 0x1a822640
kdb_backtrace(e,0,0,1a822818,1a822818,...) at kdb_backtrace+0x2e/frame
0x1a8226a0
vpanic(1576b09,1a8226e4,1a8226e4,1a822718,1515116,...) at vpanic+0x121/frame
0x1a8226c4
panic(1576b09,1601ef9,2de5000,2,1cfe645c,...) at panic+0x14/frame 0x1a8226d8
trap_fatal(10000,0,1bcd388,1ef7e28,2de9cd8,...) at trap_fatal+0x356/frame
0x1a822718
trap_pfault(1cfe645c) at trap_pfault+0x51/frame 0x1a822754
trap(1a822818,8,28,28,53f6040,...) at trap+0x3c0/frame 0x1a82280c
calltrap() at 0xffc0316d/frame 0x1a82280c
--- trap 0xc, eip = 0x19aa417a, esp = 0x1a822858, ebp = 0x1a82285c ---
vnet_ipcompstat_init(0) at vnet_ipcompstat_init+0x2a/frame 0x1a82285c
vnet_register_sysinit(19aa7ba0) at vnet_register_sysinit+0xe1/frame 0x1a822874
linker_load_module(0,0,1a822a90) at linker_load_module+0xa84/frame 0x1a822a7c
kern_kldload(1a745a80,5448000,1a822ab8) at kern_kldload+0xca/frame 0x1a822aa4
sys_kldload(1a745a80,1a745d08) at sys_kldload+0x50/frame 0x1a822ac8
syscall(1a822ba8,3b,3b,3b,1,...) at syscall+0x2b4/frame 0x1a822b9c
Xint0x80_syscall() at 0xffc033b7/frame 0x1a822b9c
--- syscall (304, FreeBSD ELF32, sys_kldload), eip = 0x20490f9f, esp =
0xffbfe7d0, ebp = 0xffbfed0c ---
ipe6_cookie() at 0x20490f9f
KDB: enter: panic
[ thread pid 778 tid 100103 ]
Stopped at      kdb_enter+0x35: movl    $0,kdb_why

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