Skip to contentSkip to conversation

New: Kernel will freeze network after using a tun/tap device

Bugme-new Andrew Morton 2 participants 2 messages Apr 15, 2009 – Apr 17, 2009 1 message not in the archive

Subsystems (2)
Networking Network drivers
lore
Share & tools
lore

A message that is not in the archive (sent off-list or not yet received): [email protected]/

Andrew Morton

author
#1 lore raw

(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).

Big fat regression!

Quoted 26 lines · On Wed, 15 Apr 2009 22:19:06 GMT [email protected] wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=13097

           Summary: Kernel will freeze network after using a tun/tap
                    device
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.30-rc2
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Network
        AssignedTo: [email protected]
        ReportedBy: [email protected]
        Regression: Yes

I choose the forcedeth driver to report this bug because I think it's related to forcedeth and not tun/tap driver, although I can be wrong.

With 2.6.29 kernel everything works fine, but with 2.6.30-rc2, a simple ping to a tun/tap device (for example ping to a vpn using openvpn) will freeze the network. In X I can't even use the keyboard anymore.

Quoted 5 lines

It just happens with a tun/tap device, not with a normal ethernet device or a normal internet connection.

If you think it's a tun/tap driver problem, please change the bug, but as I'm not completely sure, I choose forcedeth.

An obvious question would be: are you able to test the same setup with a different type of network card?

#2 lore raw
Quoted 5 lines · Andrew Morton
Quoted 5 lines

With 2.6.29 kernel everything works fine, but with 2.6.30-rc2, a simple ping to a tun/tap device (for example ping to a vpn using openvpn) will freeze the network. In X I can't even use the keyboard anymore.

Quoted 8 lines
Quoted 5 lines

It just happens with a tun/tap device, not with a normal ethernet device or a normal internet connection.

If you think it's a tun/tap driver problem, please change the bug, but as I'm not completely sure, I choose forcedeth.

An obvious question would be: are you able to test the same setup with a different type of network card?

Please get a stack backtrace of all processes on the machine after the hang, e.g., with Ctrl-ScrollLock.

Thanks,

Signature · 4 lines
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt