Bug 6759 - Kernel panic with traffic shaper + bridge
Summary: Kernel panic with traffic shaper + bridge
Status: REJECTED UNREPRODUCIBLE
Alias: None
Product: Networking
Classification: Unclassified
Component: Other (show other bugs)
Hardware: i386 Linux
: P2 normal
Assignee: Stephen Hemminger
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-06-27 19:59 UTC by Daniel Franke
Modified: 2006-07-13 11:21 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.16-ck11
Subsystem:
Regression: ---
Bisected commit-id:

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Description Daniel Franke 2006-06-27 19:59:23 UTC 
Distribution: Gentoo current
Hardware Environment: x86
Software Environment: shapecfg-36, bridge-utils-1.0.6-r3
Problem Description:
The combination of network configuration commands listed below resulted in a
kernel panic on my system.  This brought down a production server to which I
don't have physical access, so I'm not especially keen on reproducing it.  Hence
some of the steps here might not be strictly necessary to cause the panic.  When
I have the time and if needed, I'll set up a similar configuration on a box at
home for testing.

Steps to reproduce:
tunctl
shapecfg attach shaper0 tap0
ifconfig shaper0 down
brctl addbr br0
brctl addif br0 tap0
ifconfig shaper0 up
Comment 1 Andrew Morton 2006-06-27 20:09:31 UTC 
Could you please try to reproduce this on 2.6.17?
Comment 2 Stephen Hemminger 2006-07-12 16:41:49 UTC 
Can not reproduce on current (2.6.18-rc1) kernel.
The last command "ifconfig shaper0 up" generates:
# ifconfig shaper0 up
SIOCSIFFLAGS: Invalid argument
Comment 3 Stephen Hemminger 2006-07-13 11:21:49 UTC 
Can not reproduce with 2.6.17 and the listed commands

# tunctl
Set 'tap0' persistent and owned by uid 0
# modprobe shaper
# shapecfg attach shaper0 tap0
# ifconfig shaper0 down
# brctl addbr br0
# brctl addif br0 tap0
# ifconfig shaper0 up
SIOCSIFFLAGS: Invalid argument
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