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Bug 114625 - Hard lockup when bridging eth0 and tap0
Hard lockup when bridging eth0 and tap0
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i686 Linux
medium Severity high
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Assigned To: Arjan van de Ven
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2004-01-30 07:02 EST by Stefan Sorensen
Modified: 2007-04-18 13:02 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2004-09-30 11:41:49 EDT
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Stefan Sorensen 2004-01-30 07:02:01 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686) Gecko/20040107 Galeon/1.3.7

Description of problem:
When setting up an ethernet bridge between an Intel ethernet adapter
and a TUN/TAP device, the kernel locks up after a short while.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1  Create tap0 (e.g. run usermode-linux with --eth0=tuntap)
2. # ifconfig eth0 promisc up
3. # ifconfig tap0 promisc up
4. # brctl addbr br0
5. # brctl addif br0 eth0
6. # brctl addif br0 tap0
7. # ifconfig br0
8. # ping

Actual Results:  Hard lockup after a short while, Sys-Rq not possible,
nothing in logs.

Expected Results:  No lockup.

Additional info:

No problems with vanilla kernel 2.4.24.

eth0 driver is e100.
lspci info:
05:08.0 Ethernet controller: Intel Corp. 82801BD PRO/100 VE (LOM)
Ethernet Controller (rev 81)
        Subsystem: Compaq Computer Corporation: Unknown device 0091
        Flags: bus master, medium devsel, latency 66, IRQ 5
        Memory at fc500000 (32-bit, non-prefetchable) [size=4K]
        I/O ports at 1000 [size=64]
        Capabilities: [dc] Power Management version 2
Comment 1 Bugzilla owner 2004-09-30 11:41:49 EDT
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem

The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/

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