Merge tag 'nilfs2-v7.2-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/vdubeyk...

Pull nilfs2 updates from Viacheslav Dubeyko:
 "Fixes of syzbot reported issue and various small fixes in NILFS2
  functionality.

   - fix hung task in nilfs_transaction_begin() (Deepanshu Kartikey)

     Reported by syzbot. The root cause is that user-supplied segment
     numbers were not validated before nilfs_clean_segments() began
     doing work; the range check on each segnum was performed deep
     inside the call chain by nilfs_sufile_updatev(), which emits a
     nilfs_warn() per invalid entry while still holding the segctor lock
     and the sufile mi_sem.

     Fix it by validating the contents of kbufs[4] in
     nilfs_clean_segments() immediately after acquiring ns_segctor_sem
     via nilfs_transaction_lock().

   - fix a smatch warning in nilfs_mkdir() warn (Hongling Zeng)

     This corrects a semantic issue related to the use of the
     ERR_PTR macro that arose from a recent VFS change.

   - fix a backing_dev_info reference leak (Shuangpeng Bai)

     setup_bdev_super() initializes sb->s_bdev and takes a reference on
     the block device backing_dev_info when assigning sb->s_bdi.

     nilfs_fill_super() takes another reference to the same
     backing_dev_info and stores it in sb->s_bdi again. The extra
     reference is not paired with a matching bdi_put(), since
     generic_shutdown_super() releases sb->s_bdi only once.

     Drop the redundant bdi_get() in nilfs_fill_super(). The single
     reference taken by setup_bdev_super() is enough and is released
     during superblock shutdown"

* tag 'nilfs2-v7.2-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/vdubeyko/nilfs2:
  nilfs2: Fix return in nilfs_mkdir
  nilfs2: fix backing_dev_info reference leak
  nilfs2: reject CLEAN_SEGMENTS ioctl with out-of-range segment numbers