netdev - Fw: [Bug 104301] New: Connect failure on sctp socket under debug

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Message-ID: <20150909074759.1e256966@urahara>
Date:	Wed, 9 Sep 2015 07:47:59 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Vlad Yasevich <vyasevich@...il.com>,
	Neil Horman <nhorman@...driver.com>
Cc:	netdev@...r.kernel.org, linux-sctp@...r.kernel.org
Subject: Fw: [Bug 104301] New: Connect failure on sctp socket under debug



Begin forwarded message:

Date: Wed, 9 Sep 2015 13:57:38 +0000
From: "bugzilla-daemon@...zilla.kernel.org" <bugzilla-daemon@...zilla.kernel.org>
To: "shemminger@...ux-foundation.org" <shemminger@...ux-foundation.org>
Subject: [Bug 104301] New: Connect failure on sctp socket under debug


https://bugzilla.kernel.org/show_bug.cgi?id=104301

            Bug ID: 104301
           Summary: Connect failure on sctp socket under debug
           Product: Networking
           Version: 2.5
    Kernel Version: 3.13.0-63-generic
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
          Assignee: shemminger@...ux-foundation.org
          Reporter: riccardomanfrin@...il.com
        Regression: No

When starting an sctp client with gdb, I experience a connect failure (-1 is
returned), with errno 106 (Transport endpoint is already connected).

If I then cat /proc/net/sctp/assocs, I see the connection and I see the
successful handshake on wireshark.

If I ignore the connect failure, and pretend I'm actually connected, I can send
and receive packets without any trouble.

The same client application, run not-under-gdb, does not exhibits the issue and
the connect returns 0.

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