page fault in kern/kern_sig.c:1598

With GENERIC HEAD from Feb 19 13:36 UTC + mpsafe_vfs = 1 I got:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xcf5f4c78
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc0614a0b
stack pointer           = 0x10:0xcfacaca8
frame pointer           = 0x10:0xcfacacb4
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 64291 (syscall)
[thread pid 64291 tid 100582 ]
Stopped at      sigtd+0x6b:     testl   %edx,0(%eax,%esi,4)
db> where
Tracing pid 64291 tid 100582 td 0xc1e53a10
sigtd(c2700de4,1,81,c2700de4,cfacad14) at sigtd+0x6b
psignal(c2700de4,1) at psignal+0x5a
kill(c1e53a10,cfacad14,2,3,296) at kill+0x6e
syscall(2f,2f,2f,2804f6dc,bfbfeb00) at syscall+0x213

Details at http://www.holm.cc/stress/log/cons117.html
-- 
Peter Holm