Re: [PATCH net 1/1] tcp: check skb is non-NULL in tcp_rto_delta_us()

[Josh Hunt]

On 8/22/24 8:33 PM, Josh Hunt wrote:
> On 8/22/24 8:27 PM, Jason Xing wrote:
> > Hello Josh,
> >
> > On Fri, Aug 23, 2024 at 11:02 AM Josh Hunt <johunt@xxxxxxxxxx> wrote:
> > > There have been multiple occassions where we have crashed in this path
> > > because packets_out suggested there were packets on the write or 
> > > retransmit
> > > queues, but in fact there weren't leading to a NULL skb being 
> > > dereferenced.
> >
> > Could you show us the detailed splats and more information about it so
> > that we can know what exactly happened?
>
> Hey Jason
>
> Yeah for some reason my cover letter did not come through which has the 
> oops info that we hit. I'll resend it now. Fingers crossed it goes 
> through this time :)
>
> Josh
Seems like our mail server is block the cover letter for some reason 
right now. I'll have to figure out why tomorrow. I filed a bug with 
Ubuntu as well as sending this patch upstream b/c the kernel we're 
running is a stock Ubuntu kernel. The bug report there has most of what 
I put in the cover letter:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2077657

Josh