Thread (19 messages) 19 messages, 4 authors, 2018-08-07

Re: AW: AW: AW: PROBLEM: Kernel Oops in UDP stack

From: Eric Dumazet <hidden>
Date: 2018-08-02 13:05:42
Also in: netdev


On 08/02/2018 04:02 AM, Marcel Hellwig wrote:
Hi everyone,

I did three things that evening.
* I created a small dts file, so I could boot a 3.5.7 kernel.
* Ported the pskb_expand_head from 3.5.7 to 3.4.113
* Ported the whole skbuf.{c,h} file from 3.5.7 to 3.4.113
That seems bold :0)

Sorry, we only backport one fix at a time.

You can not simply copy whole files from one version to another.
Sadly enough the second and third one panicked as well, but interestingly not the first one (3.5.7 with a simple dts file). Now the question is: Is something changed outside of the skbuf (maybe in udp.{c,h}?) or is it because the dts uses a different approach of talking to the MAC of the lpc3250?

I may try a more recent kernel with a dts file (maybe a 4.x.x one), but I think that will be impossible to backport a patch for our 2.6 kernel :(

If anybody has any more ideas about why the dts kernel does not panic, you're very welcome.

Mit freundlichen Grüßen / With kind regards

Marcel Hellwig
B. Sc. Informatik
Entwickler

m-u-t GmbH
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Germany

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mhellwig@mut-group.com

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