[GIT PULL] nilfs2 changes for 7.2-rc1

[Viacheslav Dubeyko]

Hello Linus,

This pull request contains fixes of syzbot reported issue and
various small fixes in NILFS2 functionality.

Deepanshu Kartikey has fixed syzbot reported issue of a hung
task in nilfs_transaction_begin(). The root cause is that
user-supplied segment numbers are not validated before
nilfs_clean_segments() begins doing work; the range check on
each segnum is 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().

Hongling Zeng has fixed a smatch warning in nilfs_mkdir() warn.
The patch corrects a semantic issue related to the use of the ERR_PTR
macro that arose from a recent VFS change.

Shuangpeng Bai has fixed a backing_dev_info reference leak.
The setup_bdev_super() already 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.

The following changes since commit
254f49634ee16a731174d2ae34bc50bd5f45e731:

  Linux 7.1-rc1 (2026-04-26 14:19:00 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/vdubeyko/nilfs2.git
tags/nilfs2-v7.2-tag1

for you to fetch changes up to
e5925f33e4fa9ee313d481557607adce8e30ed2e:

  nilfs2: Fix return in nilfs_mkdir (2026-05-20 11:20:56 -0700)

----------------------------------------------------------------
nilfs2 updates for v7.2

- nilfs2: Fix return in nilfs_mkdir
- nilfs2: fix backing_dev_info reference leak
- nilfs2: reject CLEAN_SEGMENTS ioctl with out-of-range segment numbers

----------------------------------------------------------------
Deepanshu Kartikey (1):
      nilfs2: reject CLEAN_SEGMENTS ioctl with out-of-range segment
numbers

Hongling Zeng (1):
      nilfs2: Fix return in nilfs_mkdir

Shuangpeng Bai (1):
      nilfs2: fix backing_dev_info reference leak

 fs/nilfs2/namei.c   |  2 +-
 fs/nilfs2/segment.c | 22 ++++++++++++++++++++++
 fs/nilfs2/super.c   |  2 --
 3 files changed, 23 insertions(+), 3 deletions(-)