10.0-BETA3 Fatal trap 12 with firefox

[Ivan Klymenko]

I have
FreeBSD 10.0-BETA3 #0 r257891 amd64

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0x298
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff80b21b9b
stack pointer	        = 0x28:0xfffffe01f46d63c0
frame pointer	        = 0x28:0xfffffe01f46d6450
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 2831 (firefox)
trap number		= 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff808f99f0 at kdb_backtrace+0x60
#1 0xffffffff808c0fb5 at panic+0x155
#2 0xffffffff80ce1052 at trap_fatal+0x3a2
#3 0xffffffff80ce1329 at trap_pfault+0x2c9
#4 0xffffffff80ce0ab6 at trap+0x5e6
#5 0xffffffff80cc7d52 at calltrap+0x8
#6 0xffffffff80b2c5b4 at softdep_update_inodeblock+0x154
#7 0xffffffff80b1982c at ffs_update+0x1bc
#8 0xffffffff80b19d81 at ffs_truncate+0x431
#9 0xffffffff80b46123 at ufs_inactive+0x1b3
#10 0xffffffff80de9658 at VOP_INACTIVE_APV+0x98
#11 0xffffffff8095c701 at vinactive+0x101
#12 0xffffffff8095cb12 at vputx+0x272
#13 0xffffffff809653c6 at kern_unlinkat+0x246
#14 0xffffffff80ce1947 at amd64_syscall+0x357
#15 0xffffffff80cc803b at Xfast_syscall+0xfb
Uptime: 8h10m43s
Dumping 668 out of 6055
MB:..3%..12%..22%..32%..41%..51%..63%..72%..82%..91%
...
#0  doadump (textdump=<value optimized out>) at pcpu.h:219
219	pcpu.h: No such file or directory.
	in pcpu.h
(kgdb) #0  doadump (textdump=<value optimized out>) at pcpu.h:219
#1  0xffffffff808c0c30 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:447
#2  0xffffffff808c0ff4 in panic (fmt=<value optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:754
#3  0xffffffff80ce1052 in trap_fatal (frame=<value optimized out>, 
    eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:882
#4  0xffffffff80ce1329 in trap_pfault (frame=0xfffffe01f46d6310, usermode=0)
    at /usr/src/sys/amd64/amd64/trap.c:699
#5  0xffffffff80ce0ab6 in trap (frame=0xfffffe01f46d6310)
    at /usr/src/sys/amd64/amd64/trap.c:463
#6  0xffffffff80cc7d52 in calltrap ()
    at /usr/src/sys/amd64/amd64/exception.S:232
#7  0xffffffff80b21b9b in softdep_process_journal (mp=<value optimized out>, 
    needwk=<value optimized out>, flags=1)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:2768
#8  0xffffffff80b2c5b4 in softdep_update_inodeblock (ip=0xfffff8002b513930, 
    bp=0xfffffe01718f3cf0, waitfor=1)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:11838
#9  0xffffffff80b1982c in ffs_update (vp=0xfffff80147e43760, waitfor=1)
    at /usr/src/sys/ufs/ffs/ffs_inode.c:143
#10 0xffffffff80b19d81 in ffs_truncate (vp=<value optimized out>, 
    length=<value optimized out>, flags=<value optimized out>, cred=0x0)
    at pcpu.h:219
#11 0xffffffff80b46123 in ufs_inactive (ap=<value optimized out>)
    at /usr/src/sys/ufs/ufs/ufs_inode.c:131
#12 0xffffffff80de9658 in VOP_INACTIVE_APV (vop=<value optimized out>, 
    a=<value optimized out>) at vnode_if.c:1953
#13 0xffffffff8095c701 in vinactive (vp=0xfffff80147e43760, 
    td=0xfffff8005423c920) at vnode_if.h:807
#14 0xffffffff8095cb12 in vputx (vp=0xfffff80147e43760, func=2)
    at /usr/src/sys/kern/vfs_subr.c:2233
#15 0xffffffff809653c6 in kern_unlinkat (td=<value optimized out>, fd=-100, 
    path=0x811d2ed00 <Address 0x811d2ed00 out of bounds>, 
    pathseg=UIO_USERSPACE, oldinum=<value optimized out>)
    at /usr/src/sys/kern/vfs_syscalls.c:1868
#16 0xffffffff80ce1947 in amd64_syscall (td=0xfffff8005423c920, traced=0)
    at subr_syscall.c:134
#17 0xffffffff80cc803b in Xfast_syscall ()
    at /usr/src/sys/amd64/amd64/exception.S:391
#18 0x0000000801271e3a in ?? ()
Previous frame inner to this frame (corrupt stack?)
Current language:  auto; currently minimal
(kgdb)