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Date:      Tue, 5 Apr 2005 10:14:39 -0400
From:      John Baldwin <jhb@FreeBSD.org>
To:        freebsd-current@FreeBSD.org
Cc:        current@FreeBSD.org
Subject:   Re: Panic: HEAD as of March 23rd: duplicate free of an mbuf
Message-ID:  <200504051014.39396.jhb@FreeBSD.org>
In-Reply-To: <200503251546.41187.jhb@FreeBSD.org>
References:  <200503251546.41187.jhb@FreeBSD.org>

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On Friday 25 March 2005 03:46 pm, John Baldwin wrote:
> Panic on a 4 CPU box running buildworld -j 8 in a loop:
>
> FreeBSD/i386 (deimos.baldwin.cx) (ttyd0)
>
> login: Slab at 0xc2280fa8, freei 8 = 0.
> panic: Duplicate free of item 0xc2280800 from zone 0xc103d840(Mbuf)
>
> cpuid = 1
> KDB: enter: panic
> [thread pid 15027 tid 100093 ]
> Stopped at      kdb_enter+0x30: leave
> db> tr
> Tracing pid 15027 tid 100093 td 0xc214e000
> kdb_enter(c071f8c3,1,c073217f,e00e1b88,c214e000) at kdb_enter+0x30
> panic(c073217f,c2280800,c103d840,c071e194,c2280800) at panic+0x14e
> uma_dbg_free(c103d840,0,c2280800,8e4,1) at uma_dbg_free+0x17b
> uma_zfree_arg(c103d840,c2280800,0,4ed,c4d44300) at uma_zfree_arg+0x131
> soreceive(c4d44298,0,e00e1c80,0,0,e00e1c50,4000) at soreceive+0xa9c
> fifo_read_f(c4383ea0,e00e1c80,c2515a00,0,c214e000) at fifo_read_f+0x72
> dofileread(c214e000,c4383ea0,3,bfbfd667,1) at dofileread+0xcc
> read(c214e000,e00e1d14,c,3ff,3) at read+0x6b
> syscall(808002f,836002f,bfbf002f,bfbfd6a0,0) at syscall+0x2a0
> Xint0x80_syscall() at Xint0x80_syscall+0x1f

Still getting this panic on more recent current.  Details in an earlier 
thread.  This time it was on a UP x86 box doing a buildworld loop.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org



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