[PATCH v6.6] erofs: fix NULL dereference of dif->bdev_handle in fscache mode

[Gao Xiang]

On 2024/6/27 20:36, Gao Xiang wrote:
> Hi Greg,
> 
> On 2024/6/27 19:16, Greg KH wrote:

...

>>
>> So what specifically should we do here?
> 
> Thanks for the reply..  Honestly I'd like to revert
> 
> block: Provide bdev_open_* functions
> erofs: Convert to use bdev_open_by_path()
> erofs: fix handling kern_mount() failure
> 
> Not quite sure if they can be cleanly reverted, but
> since the upstream doen't have 'bdev_handle' anymore,
> I will resend a proper backport for
> "erofs: fix handling kern_mount() failure".

Sigh, I just tried and it seems it causes more
conflicts due to my revert.  It seems another churn..

Anyway, on 6.6 LTS only the erofs one uses the
obsolete `struct bdev_handle`, but I think at least
it doesn't cause some serious issue.

Hi Greg,

Could you just pick up Hongbo's backport to resolve
the NULL dereference issue?

Thanks,
GaoXiang

> 
> Thanks,
> Gao Xiang
> 
>>
>> thanks,
>>
>> greg k-h