panic: receive: m == 0 so->so_rcv.sb_cc == 4294967295

[Kris Kennaway]

Got this on a SMP (up-to-date) 7.0 machine doing a buildworld loop and
not much else:

panic: receive: m == 0 so->so_rcv.sb_cc == 4294967295
cpuid = 0
KDB: enter: panic
[thread pid 23098 tid 100263 ]
Stopped at      kdb_enter+0x30: leave
db> wh
Tracing pid 23098 tid 100263 td 0xc92e4af0
kdb_enter(c07060af,0,c070c9b3,f7d14bc8,c92e4af0) at kdb_enter+0x30
panic(c070c9b3,0,ffffffff,3f5,c0709939) at panic+0x13e
soreceive(c9be5b20,0,f7d14cb4,0,0,f7d14c30,4000) at soreceive+0x1cd
fifo_read_f(c8dc17e0,f7d14cb4,c5c88000,0,c92e4af0) at fifo_read_f+0x70
dofileread(c92e4af0,3,c8dc17e0,f7d14cb4,ffffffff) at dofileread+0x96
kern_readv(c92e4af0,3,f7d14cb4,bfbfdb87,1) at kern_readv+0x61
read(c92e4af0,f7d14d04,c,422,3) at read+0x4f
syscall(3b,3b,3b,bfbfdbc0,809b440) at syscall+0x295
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (3, FreeBSD ELF32, read), eip = 0x807d183, esp = 0xbfbfdb6c, ebp = 0xbfbfdb88 ---
db>

Unfortunately I can't dump on this machine.  Is there anything else I
can get from DDB?

Kris

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