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Date: Thu, 1 Nov 2001 10:47:08 -0500 (EST)
From: Doug Lee <dgl@visi.com>
Reply-To: Doug Lee <dgl@visi.com>
To: FreeBSD-gnats-submit@freebsd.org
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Subject: bin/31692: 2872-or-less-byte ftp binary transfer from smbfs share produces garbage
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>Number:         31692
>Category:       bin
>Synopsis:       2872-or-less-byte ftp binary transfer from smbfs share produces garbage
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Nov 01 07:50:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Doug Lee
>Release:        FreeBSD 4.3-STABLE i386
>Organization:
Bartimaeus Group, McLean, Virginia
>Environment:
System: FreeBSD kirk.sector14.net 4.3-STABLE FreeBSD 4.3-STABLE #5: Mon May 28 01:57:16 EDT 2001 dgl@kirk.sector14.net:/usr/obj/usr/src/sys/CUSTOM i386

Using smbfs-1.4.1
Using standard ftpd; problem does not occur when using wu-ftpd-2.6.1.

>Description:
Trying to ftp a short file from a mounted smbfs share using binary
mode will produce garbage in the garbage file instead of a copy of
the file being transferred.  The garbage varies from one attempt
to the next.  This occurs even when using "ftp localhost."  It does
not occur when transferring from a UFS mount or when transferring
in ASCII mode, or when the file is larger than 2872 bytes.  The
problem does not occur when accessing the smbfs-mounted file by
other means (e.g., ex/vi, cp, or even copying to a Windows box via
a Samba share).  tcpdump during the corrupted ftp shows that data
moves correctly from smbfs-mounted machine to FreeBSD but is
incorrect by the time it leaves FreeBSD (via ftpd) for its final
destination.  Reproduced on two machines running different 4.3-STABLE
snapshots.  Transfers using wu-ftpd-2.6.1 work properly.
>How-To-Repeat:
Mount a Windows share via smbfs, ftp localhost on the FreeBSD box,
log in and change to binary mode, and get a file of2872 bytes
or less from somewhere under the smbfs mount point.  Compare original
and transferred files.
>Fix:
Workaround: Copy the needed file via means other than ftp to a UFS
mount before getting it with FTP, or use a different ftpd.

>Release-Note:
>Audit-Trail:
>Unformatted:

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