[Bug 2864] ssh client 7.7p1: "Tunnel device open failed." (regression from 7.6p1)

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2864

--- Comment #1 from calimeroteknik at free.fr ---
The problem disappears if I erase this block of code that was added.

In function sys_tun_open() for SSH_TUN_LINUX:

Location :
(absent)  openssh-7.6p1/openbsd-compat/port-tun.c:101
(present) openssh-7.7p1/openbsd-compat/port-net.c:188

if (ifname != NULL && (*ifname = strdup(ifr.ifr_name)))
        goto failed;


For some reason I have "Could not request tunnel forwarding." in the
console but that's spurious, everything works perfectly.


I replaced the above with :

printf("one, *ifname=%s, ifname=%p\n", *ifname, ifname);

if (ifname != NULL && (*ifname = strdup(ifr.ifr_name))) {
        printf("two, *ifname=%s, ifname=%p\n", *ifname, ifname);
        goto failed;
}

I get this in the output of ssh:
one, *ifname=(null), ifname=0x7ffec28c5dc0
two, *ifname=tun0, ifname=0x7ffec28c5dc0

I'm not sure what should be happening, but this cripples tunnel for me.

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