Re: [PATCH] block: bugfix for Amiga partition overflow check patch

[Martin Steigerwald <martin@lichtvoll.de>]

Christian Zigotzky - 02.07.23, 06:37:50 CEST:
> On 02 July 2023 at 04:17 am, Michael Schmitz wrote:
> >  I'm sorry to say I cannot see a new RDB partition bug her, just the
> > result of undefined behaviour due to overflowing a 32 bit nr_sect
> > size calculation in the old RDB code.
[…]
> Thanks a lot for your explanation!
> 
> Actually, we need your patch because there is a very old bug but there
> are some endusers with RDB disks with Linux partitions. If I apply
> your patch to our kernels, then I need an enduser friendly solution
> for fixing the issue with their file systems.

I have read through the last mails without commenting. I admit: I do not 
yet get what is wrong here? A checksum was miscalculated? Is this a 
regular thing to happen when using RDB disks with Linux partitions?

I do not yet get how this issue happens. What are the steps to reproduce 
it? And how likely is it to run into it?

> Do you have a solution for the enduser (consumer)? How can they fix
> their file systems? The next issue is, if an enduser uses an old
> unpatched kernel with a partition, created with a new patched kernel.
> I don't know how can I handle this issue in the consumer support.
> 
> I can't help all endusers and some are not active in forums etc.

How many end users are you speaking of?

Back then I thought I was the only one using a hard disk with mixed 
Amiga/Linux RDB setup.

Best,
-- 
Martin