panic: mutex accept not owned at /usr/src/sys/kern/uipc_socket.c:493

dear all,
cvsup-ed yesterday (WIT/West Indonesia Time) I got my FreeBSD-5.3-STABLE box
panic:
herewith the message:

panic: mutex accept not owned at /usr/src/sys/kern/uipc_socket.c:493
KDB: stack backtrace:
kdb_backtrace(100,c2807af0,c070cd20,1ed,c06abc86) at 0xc0521c5d = kdb_backtrace+0x29
panic(c06a6b16,c06b3fcd,c06abc86,1ed,c1e92578) at 0xc050bc58 = panic+0xa8
_mtx_assert(c070cb20,1,c06abc86,1ed,c1e92578,0,c06abc86,1ec) at 0xc0504424 = _mtx_assert+0x5c
soabort(c1e92510,c070cb20,0,c06abc86,1b5) at 0xc053e9f7 = soabort+0x4f
soclose(c29743cc,c1d4fcc0,0,da15fb98,c04f14d0) at 0xc053e80c = soclose+0x120
soo_close(c1d4fcc0,c2807af0) at 0xc053066f = soo_close+0x4b
fdrop_locked(c1d4fcc0,c2807af0,c1965664,0,c06a4247) at 0xc04f14d0 = fdrop_locked+0x84
fdrop(c1d4fcc0,c2807af0,c072f520,8c0,c06bccd6) at 0x04f0720 = fdrop+0x24
closef(c1d4fcc0,c2807af0) at 0xc04f06f3 = closef+0x1db
fdfree(c2807af0,c42e89e8,c06a4247,826,c1e7d044) at 0xc04f004f = fdfree+0x2ff
exit1(c2807af0,0,da15fd40,c066a9bb,c2807af0) at 0xc04f70ca = exit1+0x3e6
exit1(c2807af0,da15fd14,1,0,292) at 0xc04f6ce4 = exit1
syscall(2f,2f,2f,1,8069100) at 0xc066a9bb = syscall+0x213
Xint0x80_syscall() at 0xc065afaf = Xint0x80_syscall+0x1f
--- syscall (1, FreeBSD ELF32, sys_exit), eip = 0x28129373, esp = 0xbfbfe34c, ebp = 0xbfbfe368 ---






any solutions ?


thanks !


-dikshie-