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.
Thanks.

Luo Meng

在 2021/7/21 2:20, Luis Chamberlain 写道:

I've bumped this from RFC to PATCH form as request by Christoph,
as it seems to line up with what he wants to do. As per Hannes
I also stuck to one form of naming, so went with blk_disk_added()
instead of blk_disk_registered() and used that instead of open
coding the flag check.

This is rebased onto next-20210720 and I've made the patch series
independent of my *add_disk*() error handling series. This goes
compile and boot tested.

Luis Chamberlain (5):
   block: add flag for add_disk() completion notation
   md: replace GENHD_FL_UP with GENHD_FL_DISK_ADDED on is_mddev_broken()
   mmc/core/block: replace GENHD_FL_UP with GENHD_FL_DISK_ADDED
   nvme: replace GENHD_FL_UP with GENHD_FL_DISK_ADDED
   fs/block_dev: replace GENHD_FL_UP with GENHD_FL_DISK_ADDED

  block/genhd.c                 |  8 ++++++++
  drivers/md/md.h               |  4 +---
  drivers/mmc/core/block.c      |  2 +-
  drivers/nvme/host/core.c      |  4 ++--
  drivers/nvme/host/multipath.c |  2 +-
  fs/block_dev.c                |  5 +++--
  include/linux/genhd.h         | 11 ++++++++++-
  7 files changed, 26 insertions(+), 10 deletions(-)