IMAP through SSH tunnels stopped working in 2.6.35

IMAP through SSH tunnels stopped working in 2.6.35

[Priit Laes]

Hi,

I recently tried out 2.6.35-rc3 kernel (latest Linus's tree), where I
noticed that I couldn't access my IMAP accounts through ssh tunnel
anymore because connection timeouts. Things used to work in 2.6.34-rc7+.

I also tested with two wireless card: b43 and iwl3945, so it isn't
driver related issue.

I'm creating tunnel using: `ssh -L 10443:server:993 server`, and then
use imap client to connect localhost:10443.

Strace log of failing ssh tunnel:

[snip]
accept(5, {sa_family=AF_INET, sin_port=htons(50055), sin_addr=inet_addr("127.0.0.1")}, [16]) = 17
getsockopt(17, SOL_TCP, TCP_NODELAY, [0], [4]) = 0
setsockopt(17, SOL_TCP, TCP_NODELAY, [1], 4) = 0
fcntl(17, F_SETFD, FD_CLOEXEC)          = 0
ioctl(17, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fff50ed3c30) = -1 EINVAL (Invalid argument)
fcntl(17, F_GETFL)                      = 0x2 (flags O_RDWR)
fcntl(17, F_SETFL, O_RDWR|O_NONBLOCK)   = 0
fcntl(17, F_GETFL)                      = 0x802 (flags O_RDWR|O_NONBLOCK)
getpeername(17, {sa_family=AF_INET, sin_port=htons(50055), sin_addr=inet_addr("127.0.0.1")}, [16]) = 0
getpeername(17, {sa_family=AF_INET, sin_port=htons(50055), sin_addr=inet_addr("127.0.0.1")}, [16]) = 0
...lots of write, select...
-------- Here  i tried to exit evolution -----------
select(18, [3 4 5 6 9 11 13 14 15 16 17], [10 12], NULL, NULL) = 1 (in [17])
read(17, "", 16384)                     = 0
shutdown(17, 0 /* receive */)           = 0
select(18, [3 4 5 6 9 11 13 14 15 16], [3 10 12], NULL, NULL) = 1 (out [3])
write(3, "\277H\201\2f.L*$\322\367&C\346\"\246T\267\33 \10`\377\23\211\r\316hp]\303h", 32) = 32
select(18, [3 4 5 6 9 11 13 14 15 16], [10 12], NULL, NULL) = 1 (in [3])
read(3, "v<L\323nr\255\237\374\320\261q\242==}\244\330Lt\355h\305dP\331x\2630;z\377"..., 8192) = 240
shutdown(17, 1 /* send */)              = 0
shutdown(17, 2 /* send and receive */)  = -1 ENOTCONN (Transport endpoint is not connected)
[/snip]

Re: IMAP through SSH tunnels stopped working in 2.6.35

[Andreas Schwab]

Priit Laes <plaes@plaes.org> writes:

> I recently tried out 2.6.35-rc3 kernel (latest Linus's tree), where I
> noticed that I couldn't access my IMAP accounts through ssh tunnel
> anymore because connection timeouts. Things used to work in 2.6.34-rc7+.

See <https://bugzilla.kernel.org/show_bug.cgi?id=16188>.

Andreas.

-- 
Andreas Schwab, schwab@redhat.com
GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84  5EC7 45C6 250E 6F00 984E
"And now for something completely different."

Re: IMAP through SSH tunnels stopped working in 2.6.35

[David Miller]

From: Andreas Schwab <schwab@redhat.com>
Date: Wed, 16 Jun 2010 12:56:53 +0200

> Priit Laes <plaes@plaes.org> writes:
> 
>> I recently tried out 2.6.35-rc3 kernel (latest Linus's tree), where I
>> noticed that I couldn't access my IMAP accounts through ssh tunnel
>> anymore because connection timeouts. Things used to work in 2.6.34-rc7+.
> 
> See <https://bugzilla.kernel.org/show_bug.cgi?id=16188>.

Also "linux-netdev" does not exist, it's just plain "netdev" :-)