Kernel panic in 7-STABLE

Hello.

I've got a kernel panic messages with my server. Here is KGDB output:

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x30
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff804c484f
stack pointer           = 0x10:0xffffffffb07c0820
frame pointer           = 0x10:0xffffff0003112350
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         = 588 (nfsd)
trap number             = 12
panic: page fault
cpuid = 1
Uptime: 1m47s
Physical memory: 4083 MB
Dumping 423 MB: 408 392 376 360 344 328 312 296 280 264 248 232 216  
200 184 168 152 136 120 104 88 72 56 40 24 8

#0  doadump () at pcpu.h:194
194             __asm __volatile("movq %%gs:0,%0" : "=r" (td));


(kgdb) bt
#0  doadump () at pcpu.h:194
#1  0x0000000000000004 in ?? ()
#2  0xffffffff8048e3c9 in boot (howto=260) at /usr/src/sys/kern/ 
kern_shutdown.c:418
#3  0xffffffff8048e7cd in panic (fmt=0x104 <Address 0x104 out of  
bounds>) at /usr/src/sys/kern/kern_shutdown.c:572
#4  0xffffffff80757e94 in trap_fatal (frame=0xffffff0003112350,  
eva=18446742974251362512) at /usr/src/sys/amd64/amd64/trap.c:724
#5  0xffffffff80758b0f in trap (frame=0xffffffffb07c0770) at /usr/src/ 
sys/amd64/amd64/trap.c:251
#6  0xffffffff8073e69e in calltrap () at /usr/src/sys/amd64/amd64/ 
exception.S:169
#7  0xffffffff804c484f in turnstile_broadcast (ts=0x0, queue=0) at / 
usr/src/sys/kern/subr_turnstile.c:835
#8  0xffffffff8048204a in _mtx_unlock_sleep (m=0xffffffff80a7be00,  
opts=Variable "opts" is not available.
) at /usr/src/sys/kern/kern_mutex.c:611
#9  0xffffffff8061f4f2 in nfsrv3_access (nfsd=0xffffff00039cfa00,  
slp=0xffffff00037eb000, td=0xffffff0003112350, mrq=0xffffffffb07c0af0)  
at /usr/src/sys/nfsserver/nfs_serv.c:253
#10 0xffffffff80630c5d in nfssvc (td=Variable "td" is not available.
) at /usr/src/sys/nfsserver/nfs_syscalls.c:461
#11 0xffffffff807584e7 in syscall (frame=0xffffffffb07c0c70) at /usr/ 
src/sys/amd64/amd64/trap.c:852
#12 0xffffffff8073e8ab in Xfast_syscall () at /usr/src/sys/amd64/amd64/ 
exception.S:290
#13 0x000000080068746c in ?? ()
Previous frame inner to this frame (corrupt stack?)

It is recent kernel of 7-STABLE.

--
Alexey Tarasov

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