5.2-CURRENT crash (Stopped at lapic_ipi_wait+0x2d)

Hi,

i just upgraded my laptop from dec 07 sources (which were fine) to 
todays -CURRENT and keep getting this when there is only little activity:

kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x300
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc06f3912
stack pointer           = 0x10:0xce1ebb5c
frame pointer           = 0x10:0xce1ebb68
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 989 (gzcat)
kernel: type 12 trap, code=0
Stopped at      lapic_ipi_wait+0x2d:    movl    0x300(%ebx),%eax
db> where
lapic_ipi_wait(f4240,c07d5838,c07d57c0,0,1) at lapic_ipi_wait+0x2d
lapic_ipi_vectored(f3,0,c16790c0,0,c16790c0) at lapic_ipi_vectored+0x90
ipi_selected(1,f3) at ipi_selected+0x47
kseq_notify(c16790c0,0,c16790c0,3,c2e66a00) at kseq_notify+0x87
kseq_transfer(c07cab40,c16790c0,3,602,c07cab40) at kseq_transfer+0xa7
sched_add(c2e66a00,1,c074b326,148,c2bd4700) at sched_add+0x1ff
setrunqueue(c2e66a00,1,c074c19f,4c1,c310b388) at setrunqueue+0x1bc
sched_wakeup(c2e66a00,1,c074b568,21b,c2e66a00) at sched_wakeup+0xaa
setrunnable(c2e66a00,0,c074b568,193,c2c65cc8) at setrunnable+0xb8
wakeup(c310b388,0,c0748886,1f3,65) at wakeup+0x7a
exit1(c2bd3dc0,0,c0748886,65,ce1ebd40) at exit1+0xfb3
exit1(c2bd3dc0,ce1ebd14,c0766b6a,3ee,1) at exit1
syscall(2f,2f,2f,0,ffffffff) at syscall+0x292
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (1, FreeBSD ELF32, sys_exit), eip = 0x280cc71f, esp = 
0xbfbfec4c, ebp = 0xbfbfec68 ---

Let me know if you need me to provide any other information.

Regards,
flo