netdev - Fw: [Bug 8013] New: select for write hangs on a socket after write returned ECONNRESET

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Message-ID: <20070215160405.3bd30b05@localhost.localdomain>
Date:	Thu, 15 Feb 2007 16:04:05 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	netdev@...r.kernel.org
Subject: Fw: [Bug 8013] New: select for write hangs on a socket after write
 returned ECONNRESET

Someone want to take a stab at fixing this??

Begin forwarded message:

Date: Wed, 14 Feb 2007 19:32:52 -0800
From: bugme-daemon@...zilla.kernel.org
To: shemminger@...ux-foundation.org
Subject: [Bug 8013] New: select for write hangs on a socket after write
returned ECONNRESET


http://bugzilla.kernel.org/show_bug.cgi?id=8013

           Summary: select for write hangs on a socket after write
returned ECONNRESET
    Kernel Version: 2.6.16
            Status: NEW
          Severity: normal
             Owner: shemminger@...l.org
         Submitter: ajd@...track.com


Distribution: Debian
Also reproduced on: 2.4 based Redhat.

Hardware Environment:
i686/Xeon
Problem Description:

If you write() to a disconnected socket, write returns ECONNRESET.
If you then select() on that socket, checking for write, the select
never returns.

For example from strace:
write(4, "fred", 4)                     = 4
...
write(4, "fred", 4)                     = -1 ECONNRESET (Connection
reset by peer)
select(5, NULL, [4], NULL, NULL ... hung in select

The select documentation says "those in writefds will be watched to see
if a write will not block".
A write on this socket will not block, therefore select should return 
immediately.

When the program is run on Solaris, AIX and HPUX, the select returns 
immediately.

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