netdev - RE: Is bug 200755 in anyone's queue??

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Date:   Fri, 23 Aug 2019 15:04:14 -0400
From:   "Steve Zabele" <zabele@...cast.net>
To:     "'Steve Zabele'" <zabele@...cast.net>, <netdev@...r.kernel.org>
Cc:     <shum@...ndrew.org>, <vladimir116@...il.com>,
        <saifi.khan@...ikr.in>, <daniel@...earbox.net>,
        <on2k16nm@...il.com>,
        "'Stephen Hemminger'" <stephen@...workplumber.org>
Subject: RE: Is bug 200755 in anyone's queue??

Hi folks,

Is there a way to find out where the SO_REUSEPORT bug reported a year ago in
August (and apparently has been a bug with kernels later than 4.4) is being
addressed?

The bug characteristics, simple standalone test code demonstrating the bug,
and an assessment of the likely location/cause of the bug within the kernel
are all described here

https://bugzilla.kernel.org/show_bug.cgi?id=200755

I'm really hoping this gets fixed so we can move forward on updating our
kernels/Ubuntu release from our aging 4.4/16.04 release

Thanks!

Steve



-----Original Message-----
From: Stephen Hemminger [mailto:stephen@...workplumber.org] 
Sent: Tuesday, July 16, 2019 10:03 AM
To: Steve Zabele
Cc: shum@...ndrew.org; vladimir116@...il.com; saifi.khan@...aSynergy.org;
saifi.khan@...ikr.in; daniel@...earbox.net; on2k16nm@...il.com
Subject: Re: Is bug 200755 in anyone's queue??

On Tue, 16 Jul 2019 09:43:24 -0400
"Steve Zabele" <zabele@...cast.net> wrote:


> I came across bug report 200755 trying to figure out why some code I had
> provided to customers a while ago no longer works with the current Linux
> kernel. See
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=200755
> 
> I've verified that, as reported, 'connect' no longer works for UDP.
> Moreover, it appears it has been broken since the 4.5 kernel has been
> released. 
> 
>  
> 
> It does also appear that the intended new feature of doing round robin
> assignments to different UDP sockets opened with SO_REUSEPORT also does
not
> work as described.
> 
>  
> 
> Since the original bug report was made nearly a year ago for the 4.14
kernel
> (and the bug is also still present in the 4.15 kernel) I'm curious if
anyone
> is on the hook to get this fixed any time soon.
> 
>  
> 
> I'd rather not have to do my own demultiplexing using a single socket in
> user space to work around what is clearly a (maybe not so recently
> introduced) kernel bug if at all possible. My code had worked just fine on
> 3.X kernels, and appears to work okay up through 4.4. 
> 

Kernel developers do not use bugzilla, I forward bug reports
to netdev@...r.kernel.org (after filtering).