On Fri, Nov 12, 2021 at 06:48:11AM +0100, Christoph Hellwig wrote:
On Thu, Nov 11, 2021 at 07:53:08PM +0100, Pavel Machek wrote:
There is some more context on this at: https://lore.kernel.org/linux-block/YXweJ00CVsDLCI7b@google.com/T/#u and https://lore.kernel.org/stable/YYVZBuDaWBKT3vOS@google.com/T/#u
Thank you!
Honestly, this looks broken to me. multipage-bvec was a big invasive series with a lot of latter fixups. While taking this patch on it's own should be save by itself, but also useless. So if it is needed to make a KASAN warning go away we need to dig deeper and back something else out that should not have been backported to rely on multipage bvec becasue without the other patches they don't exist and can't acually work.
Ok, let me drop this for now.
Zubin, can you provide a better report as to what driver is causing the problem and what exactly resolves it? Has this issue always been in 4.19 since 4.19.0?
thanks,
greg k-h