From owner-freebsd-bugs@freebsd.org  Tue Jan 10 12:27:13 2017
Return-Path: <owner-freebsd-bugs@freebsd.org>
Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 638F1CA6889
 for <freebsd-bugs@mailman.ysv.freebsd.org>;
 Tue, 10 Jan 2017 12:27:13 +0000 (UTC)
 (envelope-from bugzilla-noreply@freebsd.org)
Received: from kenobi.freebsd.org (kenobi.freebsd.org
 [IPv6:2001:1900:2254:206a::16:76])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 5307C1250
 for <freebsd-bugs@FreeBSD.org>; Tue, 10 Jan 2017 12:27:13 +0000 (UTC)
 (envelope-from bugzilla-noreply@freebsd.org)
Received: from bugs.freebsd.org ([127.0.1.118])
 by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v0ACRDYj091785
 for <freebsd-bugs@FreeBSD.org>; Tue, 10 Jan 2017 12:27:13 GMT
 (envelope-from bugzilla-noreply@freebsd.org)
From: bugzilla-noreply@freebsd.org
To: freebsd-bugs@FreeBSD.org
Subject: [Bug 215933] SCM_RIGHTS messages being lost, socket data being lost
 as well, with example code..
Date: Tue, 10 Jan 2017 12:27:13 +0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: 10.3-STABLE
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: Affects Many People
X-Bugzilla-Who: ian@niw.com.au
X-Bugzilla-Status: New
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: ---
X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-215933-8-VI8ipAg6wL@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-215933-8@https.bugs.freebsd.org/bugzilla/>
References: <bug-215933-8@https.bugs.freebsd.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs/>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 10 Jan 2017 12:27:13 -0000

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D215933

--- Comment #1 from ian@niw.com.au ---
By adding a small delay to the example code the problem becomes
far more consistently repeatable.

int
main(int argc, char *argv[]){
        int fds[2];
        size_t total=3D0;
        if(socketpair(AF_UNIX,SOCK_STREAM,0,fds)=3D=3D0){
                size_t sequence=3D0;
                int newpid=3Dfork();
                if(newpid<0) exit(EX_OSERR);
                if(newpid=3D=3D0){ close(fds[1]); run_consumer(fds[0]); }
                close(fds[0]);
                printf("Master ready..\n");
                for(size_t i=3D6000;i<8500;i++){
                        int tfd=3Dopen("/dev/null",O_WRONLY);
                        total+=3Dsend_test_message(fds[1],sequence++,i,-1);
                        total+=3Dsend_test_message(fds[1],sequence++,0,tfd);
                        close(tfd);
 ----->                 usleep(100);
                }
        }
        printf("Master sent a total of %zd bytes\n",total);
        usleep(50000);
        exit(0);
}

With this change I have 100% consistent loss of data for large frame sizes =
of=20
8154 to 8192 when using a local stream socket buffer size of 8192 bytes.

--=20
You are receiving this mail because:
You are the assignee for the bug.=