From owner-freebsd-current  Wed Oct 23  9: 3:45 2002
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Date: Wed, 23 Oct 2002 18:03:03 +0200
From: Sheldon Hearn <sheldonh@starjuice.net>
To: Vitaly Markitantov <vm@dics.com.ua>
Cc: current@FreeBSD.ORG
Subject: Re: smbfs broken?
Message-ID: <20021023160303.GN661@starjuice.net>
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On (2002/10/23 18:00), Sheldon Hearn wrote:

> Confirmed with rev 1.9 of subr_mchain.c.
> 
> However, I notice that this only happens with files of 8145 bytes size
> or larger.
> 
> [server]
> # for i in `jot 512 7680`; do
> 	dd if=/dev/zero of=$i bs=$i count=1
>  done 2>/dev/null
> 
> [client]
> $ for i in `jot 512 7680`; do
> 	cp /smb/urchin/pub/bytes/$i . || break;
>  done
> cp: ./8145: Bad address
> 
> If I truss the cp process, I get this:
> 
> [...]
> open("/smb/urchin/pub/bytes/8145",0x0,00) = 3 (0x3)
> open("./8145",0x401,00)                   = 4 (0x4)
> mmap(0x0,8145,0x1,0x1,3,0x0)              = 671461376 (0x2805b000)

Actually, cat(1) is a simpler test case, and more accurately reflects
the problem:

open("/smb/urchin/pub/bytes/8145",0x0,00)   = 3 (0x3)
fstat(1,0xbfbff620)                         = 0 (0x0)
read(0x3,0x805e000,0x2000)                  ERR#60 'Operation timed out'

Ciao,
Sheldon.

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