lock order reversal: (sleepable after non-sleepable)
 1st 0xc3c7237c vmhgfs (vmhgfs) @ /usr/src/sys/kern/vfs_lookup.c:497
 2nd 0xc3b618a0 HgfsHashChain (HgfsHashChain) @ os.c:350
 3rd 0xc3c96488 vmhgfs (vmhgfs) @ /usr/src/sys/kern/vfs_subr.c:2083
KDB: stack backtrace:
db_trace_self_wrapper(c0c740b0,d6487814,c08c11c5,c08b1f4b,c0c76f9c,...) at db_trace_self_wrapper+0x26
kdb_backtrace(c08b1f4b,c0c76f9c,c3515708,c3515770,d6487870,...) at kdb_backtrace+0x29
_witness_debugger(c0c76f9c,c3c96488,c3a291b2,c3515770,c0c7e215,...) at _witness_debugger+0x25
witness_checkorder(c3c96488,9,c0c7e215,823,0,...) at witness_checkorder+0x839
__lockmgr_args(c3c96488,200100,c3c964a4,0,0,...) at __lockmgr_args+0x7a7
vop_stdlock(d6487978,c0c7e215,d648797c,200100,c3c96430,...) at vop_stdlock+0x62
VOP_LOCK1_APV(c3a2a720,d6487978,200000,c0d90240,c3c96430,...) at VOP_LOCK1_APV+0xb5
_vn_lock(c3c96430,200100,c0c7e215,823,c3a28396,...) at _vn_lock+0x5e
vget(c3c96430,200000,c3c86900,c3a22822,c38fea80,...) at vget+0xb9
HgfsVnodeGetInt(c38f4a10,c376bc00,1,c3a1381c,0,...) at HgfsVnodeGetInt+0x84
HgfsLookupInt(c3c72324,d6487c0c,d6487c20,d6487af4,c0bbdca5,...) at HgfsLookupInt+0x188
HgfsVopLookup(d6487b44,d6487b44,d6487bf4,200000,d6487bf4,...) at HgfsVopLookup+0x22
VOP_LOOKUP_APV(c3a2a720,d6487b44,d6487c20,1f1,d6487c0c,...) at VOP_LOOKUP_APV+0xa5
lookup(d6487bf4,c0c7d824,ea,c5,ffffff9c,...) at lookup+0x62b
namei(d6487bf4,c390b1c0,c3c86900,d6487c1c,c08c38c5,...) at namei+0x55f
kern_pathconf(c3c86900,bfbfdd03,0,3b,40,...) at kern_pathconf+0x56
pathconf(c3c86900,d6487cf8,8,c0c5970e,c0d57444,...) at pathconf+0x31
syscall(d6487d38) at syscall+0x2a3
Xint0x80_syscall() at Xint0x80_syscall+0x20
--- syscall (191, FreeBSD ELF32, pathconf), eip = 0x28166d4f, esp = 0xbfbfd8ac, ebp = 0xbfbfe128 ---
panic: Lock (lockmgr) vmhgfs not locked @ /usr/src/sys/kern/vfs_lookup.c:875.
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper(c0c740b0,d648f6cc,c0880459,c0ca88b8,0,...) at db_trace_self_wrapper+0x26
kdb_backtrace(c0ca88b8,0,c0c76a23,d648f6d8,0,...) at kdb_backtrace+0x29
panic(c0c76a23,c0c6e12a,c3a291b2,c0c7d824,36b,...) at panic+0x119
witness_assert(c3c96270,2,c0c7d824,36b,100000,...) at witness_assert+0x117
_lockmgr_assert(c3c96270,2,c0c7d824,36b,df,...) at _lockmgr_assert+0x51
__lockmgr_args(c3c96270,400400,c3c9628c,0,0,...) at __lockmgr_args+0x5a4
vop_stdlock(d648f81c,c3c86480,c3c86480,400400,c3c96218,...) at vop_stdlock+0x62
VOP_LOCK1_APV(c3a2a720,d648f81c,d648f824,c0d90240,c3c96218,...) at VOP_LOCK1_APV+0xb5
_vn_lock(c3c96218,400400,c0c7d824,36b,d648fb24,...) at _vn_lock+0x5e
lookup(d648fb0c,c0c7d824,d6,c5,c3c802a8,...) at lookup+0xd38
namei(d648fb0c,c,0,c350f248,1,...) at namei+0x55f
vn_open_cred(d648fb0c,d648fb98,0,1,c3c7c000,...) at vn_open_cred+0x32f
vop_stdvptocnp(d648fbec,0,d648fc28,d648fbec,d648fc14,...) at vop_stdvptocnp+0x15d
VOP_VPTOCNP_APV(c3a2a720,d648fbec,c0c7d0ee,446,c376c400,...) at VOP_VPTOCNP_APV+0xa5
vn_vptocnp_locked(d648fc48,c0c7d0ee,475,c3c9610c,c3795a78,...) at vn_vptocnp_locked+0x164
vn_fullpath1(c376c400,d648fc58,3ff,3a4,c376c400,...) at vn_fullpath1+0x148
kern___getcwd(c3c86480,bfbfe026,0,400,d648fd2c,...) at kern___getcwd+0xd0
__getcwd(c3c86480,d648fcf8,8,c3c86480,c0d58308,...) at __getcwd+0x29
syscall(d648fd38) at syscall+0x2a3
Xint0x80_syscall() at Xint0x80_syscall+0x20
--- syscall (326, FreeBSD ELF32, __getcwd), eip = 0x8067fd7, esp = 0xbfbfde7c, ebp = 0xbfbfdf38 ---
Uptime: 1m5s
Physical memory: 495 MB
Dumping 49 MB: 34 18 2
Dump complete