[GIT PULL] vfs fixes

[Christian Brauner <brauner@kernel.org>]

Hey Linus,

/* Summary */

This contains a few fixes for this cycle:

- Fix two memory leaks in pidfs.

- Prevent changing the idmapping of an already idmapped mount without
  OPEN_TREE_CLONE through open_tree_attr().

- Don't fail listing extended attributes in kernfs when no extended
  attributes are set.

- Fix the return value in coredump_parse().

- Fix the error handling for unbuffered writes in netfs.

- Fix broken data integrity guarantees for O_SYNC writes via iomap.

- Fix UAF in __mark_inode_dirty().

- Keep inode->i_blkbits constant in fuse.

- Fix coredump selftests.

- Fix get_unused_fd_flags() usage in do_handle_open().

- Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES.

- Fix use-after-free in bh_read().

- Fix incorrect lflags value in the move_mount() syscall.

/* 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 8f5ae30d69d7543eee0d70083daf4de8fe15d585:

  Linux 6.17-rc1 (2025-08-10 19:41:16 +0300)

are available in the Git repository at:

  git@gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs tags/vfs-6.17-rc3.fixes

for you to fetch changes up to a2c1f82618b0b65f1ef615aa9cfdac8122537d69:

  signal: Fix memory leak for PIDFD_SELF* sentinels (2025-08-19 13:51:28 +0200)

Please consider pulling these changes from the signed vfs-6.17-rc3.fixes tag.

Thanks!
Christian

----------------------------------------------------------------
vfs-6.17-rc3.fixes

----------------------------------------------------------------
Adrian Huang (Lenovo) (2):
      pidfs: Fix memory leak in pidfd_info()
      signal: Fix memory leak for PIDFD_SELF* sentinels

Aleksa Sarai (2):
      open_tree_attr: do not allow id-mapping changes without OPEN_TREE_CLONE
      selftests/mount_setattr: add smoke tests for open_tree_attr(2) bug

Christian Brauner (2):
      Merge patch series "open_tree_attr: do not allow id-mapping changes without OPEN_TREE_CLONE"
      kernfs: don't fail listing extended attributes

Dan Carpenter (1):
      coredump: Fix return value in coredump_parse()

David Howells (1):
      netfs: Fix unbuffered write error handling

Jan Kara (1):
      iomap: Fix broken data integrity guarantees for O_SYNC writes

Jiufei Xue (1):
      fs: writeback: fix use-after-free in __mark_inode_dirty()

Joanne Koong (1):
      fuse: keep inode->i_blkbits constant

Nam Cao (1):
      selftests/coredump: Remove the read() that fails the test

Thomas Bertschinger (1):
      fhandle: do_handle_open() should get FD with user flags

Vlastimil Babka (1):
      module: Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES

Ye Bin (1):
      fs/buffer: fix use-after-free when call bh_read() helper

Yuntao Wang (1):
      fs: fix incorrect lflags value in the move_mount syscall

 Documentation/core-api/symbol-namespaces.rst       | 11 ++--
 drivers/tty/serial/8250/8250_rsa.c                 |  8 +--
 fs/anon_inodes.c                                   |  2 +-
 fs/buffer.c                                        |  2 +-
 fs/coredump.c                                      |  2 +-
 fs/fhandle.c                                       |  2 +-
 fs/fs-writeback.c                                  |  9 +--
 fs/fuse/inode.c                                    |  5 --
 fs/iomap/direct-io.c                               | 14 ++--
 fs/kernfs/inode.c                                  |  4 +-
 fs/namespace.c                                     | 35 ++++++----
 fs/netfs/read_collect.c                            |  4 +-
 fs/netfs/write_collect.c                           | 10 ++-
 fs/netfs/write_issue.c                             |  4 +-
 fs/pidfs.c                                         |  2 +-
 fs/splice.c                                        |  3 +
 include/linux/export.h                             |  2 +-
 include/linux/netfs.h                              |  1 +
 kernel/signal.c                                    |  6 +-
 tools/testing/selftests/coredump/stackdump_test.c  |  3 -
 .../selftests/mount_setattr/mount_setattr_test.c   | 77 ++++++++++++++++++----
 21 files changed, 138 insertions(+), 68 deletions(-)