On today's -current:

lock order reversal
1st 0xc6948234 filedesc structure (filedesc structure) @ /usr/src/sys/kern/sys_generic.c:901
2nd 0xc691f380 pipe mutex (pipe mutex) @ /usr/src/sys/kern/sys_pipe.c:1239

Debugger("witness_lock")
Stopped at Debugger+0x5a: xchgl %ebx,in_Debugger.0

db> trace

Debugger(c0320e4d,c691f380,c0341c32,c0341c32,c0342671) at Debugger+0x5a
witness_lock(c691f380,8,c0342671,4d7,c01f3b4a) at witness_lock+0x142
_mtx_lock_flags(c691f380,0,c0342671,4d7,c65c76cc) at _mtx_lock_flags+0x63
pipe_poll(c65c76cc,40,c21af180,c65d3460,c21af180) at pipe_poll+0x3d
selscan(c65d3460,eb36ab90,eb36ab80,14,4) at selscan+0xdf
kern_select(c65d3460,14,804c940,0,0) at kern_select+0x41f
select(c65d3460,eb36ad10,c035adb4,407,c65d27c8) at select+0x42
syscall(2f,2f,2f,804c9c0,804c8a0) at syscall+0x3c6
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (93, FreeBSD ELF32, select), eip = 0x280b3853, esp = 0xbfbff90c, ebp = 0xbfbffd60 ---

Lars
--
Lars Eggert <[EMAIL PROTECTED]> USC Information Sciences Institute

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