Date: Sun, 6 Dec 2015 11:45:32 +0100 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: FreeBSD Current <freebsd-current@freebsd.org> Subject: panic: vm_fault: fault on nofault entry, addr: fffffe00873d8000 Message-ID: <20151206114532.73b1dac9@fabiankeil.de>
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I got the following panic while trying to import a ZFS pool from a
geli-encrypted memory disk backed by a file located on a msdosfs partition:
(kgdb) where
#0 doadump (textdump=3D0) at pcpu.h:221
#1 0xffffffff80314c1b in db_dump (dummy=3D<value optimized out>, dummy2=3D=
false, dummy3=3D0, dummy4=3D0x0) at /usr/src/sys/ddb/db_command.c:533
#2 0xffffffff80314a0e in db_command (cmd_table=3D0x0) at /usr/src/sys/ddb/=
db_command.c:440
#3 0xffffffff803147a4 in db_command_loop () at /usr/src/sys/ddb/db_command=
.c:493
#4 0xffffffff803172ab in db_trap (type=3D<value optimized out>, code=3D0) =
at /usr/src/sys/ddb/db_main.c:251
#5 0xffffffff805dfe33 in kdb_trap (type=3D3, code=3D0, tf=3D<value optimiz=
ed out>) at /usr/src/sys/kern/subr_kdb.c:654
#6 0xffffffff80879bc7 in trap (frame=3D0xfffffe009444a240) at /usr/src/sys=
/amd64/amd64/trap.c:549
#7 0xffffffff8085eb77 in calltrap () at /usr/src/sys/amd64/amd64/exception=
.S:234
#8 0xffffffff805df51b in kdb_enter (why=3D0xffffffff8096c7fb "panic", msg=
=3D0x32 <Address 0x32 out of bounds>) at cpufunc.h:63
#9 0xffffffff8059bbdf in vpanic (fmt=3D<value optimized out>, ap=3D<value =
optimized out>) at /usr/src/sys/kern/kern_shutdown.c:750
#10 0xffffffff8059ba33 in panic (fmt=3D0x0) at /usr/src/sys/kern/kern_shutd=
own.c:688
#11 0xffffffff8082ffb5 in vm_fault_hold (map=3D<value optimized out>, vaddr=
=3D<value optimized out>, fault_type=3D<value optimized out>, fault_flags=
=3D<value optimized out>, m_hold=3D<value optimized out>)
at /usr/src/sys/vm/vm_fault.c:332
#12 0xffffffff8082de18 in vm_fault (map=3D0xfffff80002000000, vaddr=3D<valu=
e optimized out>, fault_type=3D2 '\002', fault_flags=3D0) at /usr/src/sys/v=
m/vm_fault.c:277
#13 0xffffffff8087a33a in trap_pfault (frame=3D0xfffffe009444a8e0, usermode=
=3D0) at /usr/src/sys/amd64/amd64/trap.c:734
#14 0xffffffff80879bde in trap (frame=3D0xfffffe009444a8e0) at /usr/src/sys=
/amd64/amd64/trap.c:435
#15 0xffffffff8085eb77 in calltrap () at /usr/src/sys/amd64/amd64/exception=
.S:234
#16 0xffffffff80877d5a in bcopy () at /usr/src/sys/amd64/amd64/support.S:118
#17 0xffffffff805f64e8 in uiomove_faultflag (cp=3D<value optimized out>, n=
=3D<value optimized out>, uio=3D0xfffffe009444aae0, nofault=3D<value optimi=
zed out>) at /usr/src/sys/kern/subr_uio.c:208
#18 0xffffffff8046236f in msdosfs_read (ap=3D<value optimized out>) at /usr=
/src/sys/fs/msdosfs/msdosfs_vnops.c:596
#19 0xffffffff808feb20 in VOP_READ_APV (vop=3D<value optimized out>, a=3D<v=
alue optimized out>) at vnode_if.c:930
#20 0xffffffff8039bf3a in mdstart_vnode (sc=3D0xfffff8004c7ce000, bp=3D0xff=
fff80028fc81f0) at vnode_if.h:384
#21 0xffffffff8039a3cc in md_kthread (arg=3D0xfffff8004c7ce000) at /usr/src=
/sys/dev/md/md.c:979
#22 0xffffffff8055978c in fork_exit (callout=3D0xffffffff8039a1a0 <md_kthre=
ad>, arg=3D0xfffff8004c7ce000, frame=3D0xfffffe009444ac00) at /usr/src/sys/=
kern/kern_fork.c:1011
#23 0xffffffff8085f0ae in fork_trampoline () at /usr/src/sys/amd64/amd64/ex=
ception.S:609
#24 0x0000000000000000 in ?? ()
Current language: auto; currently minimal
This is the second time I've seen this, the first time was with a kernel
based on r290573 in November, but as I wasn't able to intentionally reprodu=
ce
it with a more recent kernel my assumption was that the problem had already
been fixed.
Currently my kernel is based on r291706.
Any ideas?
Fabian
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