9.1-stable crashes while copying data from a NFS mounted directory

[Christian Gusenbauer]

Hi!

I'm using 9.1 stable svn revision 245605 and I get the panic below if I execute the following commands (as single user):

# swapon -a
# dumpon /dev/ada0s3b
# mount -u /
# ifconfig age0 inet 192.168.2.2 mtu 6144 up
# mount -t nfs -o rsize=32768 data:/multimedia /mnt
# cp /mnt/Movies/test/a.m2ts /tmp

then the system panics almost immediately. I'll attach the stack trace.

Note, that I'm using jumbo frames (6144 byte) on a 1Gbit network, maybe that's the cause for the panic, because the bcopy (see 
stack frame #15) fails.

Any clues?

Ciao,
Christian.

#0  doadump (textdump=0)
    at /spare/tmp/src-stable9/sys/kern/kern_shutdown.c:265
265             if (textdump && textdump_pending) {
(kgdb) #0  doadump (textdump=0)
    at /spare/tmp/src-stable9/sys/kern/kern_shutdown.c:265
#1  0xffffffff802a8ba0 in db_dump (dummy=<value optimized out>,
    dummy2=<value optimized out>, dummy3=<value optimized out>,
    dummy4=<value optimized out>)
    at /spare/tmp/src-stable9/sys/ddb/db_command.c:538
#2  0xffffffff802a84ce in db_command (last_cmdp=0xffffffff808bc5c0,
    cmd_table=<value optimized out>, dopager=1)
    at /spare/tmp/src-stable9/sys/ddb/db_command.c:449
#3  0xffffffff802a8720 in db_command_loop ()
    at /spare/tmp/src-stable9/sys/ddb/db_command.c:502
#4  0xffffffff802aa859 in db_trap (type=<value optimized out>,
    code=<value optimized out>)
    at /spare/tmp/src-stable9/sys/ddb/db_main.c:231
#5  0xffffffff803c4918 in kdb_trap (type=3, code=0, tf=0xffffff81b2da8a80)
    at /spare/tmp/src-stable9/sys/kern/subr_kdb.c:649
#6  0xffffffff805a02cf in trap (frame=0xffffff81b2da8a80)
    at /spare/tmp/src-stable9/sys/amd64/amd64/trap.c:579
#7  0xffffffff8058992f in calltrap ()
    at /spare/tmp/src-stable9/sys/amd64/amd64/exception.S:228
#8  0xffffffff803c43cb in kdb_enter (why=0xffffffff806145f3 "panic",
    msg=0x80 <Address 0x80 out of bounds>) at cpufunc.h:63
#9  0xffffffff8038f407 in panic (fmt=<value optimized out>)
    at /spare/tmp/src-stable9/sys/kern/kern_shutdown.c:627
#10 0xffffffff80568049 in vm_fault_hold (map=0xfffffe0002000000,
    vaddr=18446743530148802560, fault_type=2 '\002', fault_flags=0,
    m_hold=0x0) at /spare/tmp/src-stable9/sys/vm/vm_fault.c:285
#11 0xffffffff80568753 in vm_fault (map=0xfffffe0002000000,
    vaddr=18446743530148802560, fault_type=<value optimized out>,
    fault_flags=0) at /spare/tmp/src-stable9/sys/vm/vm_fault.c:229
#12 0xffffffff805a00c7 in trap_pfault (frame=0xffffff81b2da9170, usermode=0)
    at /spare/tmp/src-stable9/sys/amd64/amd64/trap.c:771
#13 0xffffffff805a051e in trap (frame=0xffffff81b2da9170)
    at /spare/tmp/src-stable9/sys/amd64/amd64/trap.c:463
#14 0xffffffff8058992f in calltrap ()
    at /spare/tmp/src-stable9/sys/amd64/amd64/exception.S:228
#15 0xffffffff8059d7b5 in bcopy ()
    at /spare/tmp/src-stable9/sys/amd64/amd64/support.S:134
#16 0xffffffff81c5963b in nfsm_mbufuio (nd=0xffffff81b2da9320,
    uiop=<value optimized out>, siz=32768)
    at /spare/tmp/src-stable9/sys/modules/nfscommon/../../fs/nfs/nfs_commonsubs.c:212
#17 0xffffffff81c19571 in nfsrpc_read (vp=0xfffffe0005ca2000,
    uiop=0xffffff81b2da95a0, cred=<value optimized out>,
    p=0xfffffe0005f28000, nap=0xffffff81b2da9480,
    attrflagp=0xffffff81b2da954c, stuff=0x0)
    at /spare/tmp/src-stable9/sys/modules/nfscl/../../fs/nfsclient/nfs_clrpcops.c:1343
#18 0xffffffff81c3aff0 in ncl_readrpc (vp=0xfffffe0005ca2000,
    uiop=0xffffff81b2da95a0, cred=<value optimized out>)
    at /spare/tmp/src-stable9/sys/modules/nfscl/../../fs/nfsclient/nfs_clvnops.c:1366
#19 0xffffffff81c2fed3 in ncl_doio (vp=0xfffffe0005ca2000,
    bp=0xffffff816fabca20, cr=0xfffffe0002d59e00, td=0xfffffe0005f28000,
    called_from_strategy=0)
    at /spare/tmp/src-stable9/sys/modules/nfscl/../../fs/nfsclient/nfs_clbio.c:1605
#20 0xffffffff81c32aaf in ncl_bioread (vp=0xfffffe0005ca2000,
    uio=0xffffff81b2da9ad0, ioflag=<value optimized out>,
    cred=0xfffffe0002d59e00)
    at /spare/tmp/src-stable9/sys/modules/nfscl/../../fs/nfsclient/nfs_clbio.c:541
#21 0xffffffff804379c3 in vn_read (fp=0xfffffe0005f3e960,
    uio=0xffffff81b2da9ad0, active_cred=<value optimized out>,
    flags=<value optimized out>, td=<value optimized out>) at vnode_if.h:384
#22 0xffffffff80434d40 in vn_io_fault (fp=0xfffffe0005f3e960,
    uio=0xffffff81b2da9ad0, active_cred=0xfffffe0002d59e00, flags=0,
    td=0xfffffe0005f28000) at /spare/tmp/src-stable9/sys/kern/vfs_vnops.c:903
#23 0xffffffff803d7bd1 in dofileread (td=0xfffffe0005f28000, fd=3,
    fp=0xfffffe0005f3e960, auio=0xffffff81b2da9ad0,
    offset=<value optimized out>, flags=0) at file.h:287
#24 0xffffffff803d7f7c in kern_readv (td=0xfffffe0005f28000, fd=3,
    auio=0xffffff81b2da9ad0)
    at /spare/tmp/src-stable9/sys/kern/sys_generic.c:250
#25 0xffffffff803d8074 in sys_read (td=<value optimized out>,
    uap=<value optimized out>)
    at /spare/tmp/src-stable9/sys/kern/sys_generic.c:166
#26 0xffffffff8059f4f0 in amd64_syscall (td=0xfffffe0005f28000, traced=0)
    at subr_syscall.c:135
#27 0xffffffff80589c17 in Xfast_syscall ()
    at /spare/tmp/src-stable9/sys/amd64/amd64/exception.S:387
#28 0x00000008009245fc in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)