On Wed, Aug 11, 2021 at 10:42:20AM +0800, luomeng wrote:

Hi:
   When the fuzz test injected memory allocation failed, I had this BUG_ON:
kernel BUG at fs/sysfs/group.c:116.
  The cause of the bug_ON is that the add_disk memory fails to be allocated
but no error processing is performed.
  I find your patches add error processing. So what is your next step with
these patches.

I have one more pending series on top of this one I need to submit here:

http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/alloc_disk

to make sure the disk always has a valid queue reference.  After that
Luis work to return an error from add_disk should be much easier bause
we not have defined state.