[GIT PULL] vfs fixes

[Christian Brauner]

Hey Linus,

/* Summary */

This contains various fixes for this cycle:

* Fix NULL pointer dereference in virtiofs.

* Fix slab OOB access in hfs/hfsplus.

* Only create /proc/fs/netfs when CONFIG_PROC_FS is set.

* Fix getname_flags() to initialize pointer correctly.

* Convert dentry flags to enum.

* Don't allow datadir without lowerdir in overlayfs.

* Use namespace_{lock,unlock} helpers in dissolve_on_fput() instead of
  plain namespace_sem so unmounted mounts are properly cleaned up.

* Skip unnecessary ifs_block_is_uptodate check in iomap.

* Remove an unused forward declaration in overlayfs.

* Fix devpts uid/gid handling after converting to the new mount api.

* Fix afs_dynroot_readdir() to not use the RCU read lock.

* Fix mount_setattr() and open_tree_attr() to not pointlessly do path
  lookup or walk the mount tree if no mount option change has been
  requested.

/* Testing */

gcc (Debian 14.2.0-19) 14.2.0
Debian clang version 19.1.7 (3)

No build failures or warnings were observed.

/* Conflicts */

Merge conflicts with mainline
=============================

No known conflicts.

Merge conflicts with other trees
================================

No known conflicts.

The following changes since commit 0af2f6be1b4281385b618cb86ad946eded089ac8:

  Linux 6.15-rc1 (2025-04-06 13:11:33 -0700)

are available in the Git repository at:

  git@xxxxxxxxxxxxxxxxxxx:pub/scm/linux/kernel/git/vfs/vfs tags/vfs-6.15-rc3.fixes

for you to fetch changes up to e2aef868a8c39f411eb7bcee3c42e165a21d5cd6:

  Merge tag 'ovl-fixes-6.15-rc2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs (2025-04-11 16:41:48 +0200)

Please consider pulling these changes from the signed vfs-6.15-rc3.fixes tag.

Thanks!
Christian

----------------------------------------------------------------
vfs-6.15-rc3.fixes

----------------------------------------------------------------
Christian Brauner (2):
      mount: ensure we don't pointlessly walk the mount tree
      Merge tag 'ovl-fixes-6.15-rc2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs

David Howells (2):
      devpts: Fix type for uid and gid params
      afs: Fix afs_dynroot_readdir() to not use the RCU read lock

Giuseppe Scrivano (1):
      ovl: remove unused forward declaration

Gou Hao (1):
      iomap: skip unnecessary ifs_block_is_uptodate check

Jan Stancek (1):
      fs: use namespace_{lock,unlock} in dissolve_on_fput()

Miklos Szeredi (1):
      ovl: don't allow datadir only

Omar Sandoval (1):
      dcache: convert dentry flag macros to enum

Song Liu (2):
      netfs: Only create /proc/fs/netfs with CONFIG_PROC_FS
      fs: Fix filename init after recent refactoring

Vasiliy Kovalev (1):
      hfs/hfsplus: fix slab-out-of-bounds in hfs_bnode_read_key

Xiangsheng Hou (1):
      virtiofs: add filesystem context source name check

 fs/afs/dynroot.c         |   4 +-
 fs/devpts/inode.c        |   4 +-
 fs/fuse/virtio_fs.c      |   3 ++
 fs/hfs/bnode.c           |   6 +++
 fs/hfsplus/bnode.c       |   6 +++
 fs/iomap/buffered-io.c   |   2 +-
 fs/namei.c               |   8 ++--
 fs/namespace.c           |  34 +++++++++------
 fs/netfs/main.c          |   4 ++
 fs/overlayfs/overlayfs.h |   2 -
 fs/overlayfs/super.c     |   5 +++
 include/linux/dcache.h   | 106 ++++++++++++++++++++++-------------------------
 12 files changed, 104 insertions(+), 80 deletions(-)