linux-stable.git/fs/proc/generic.c, branch linux-4.1.y

proc: Fix unbalanced hard link numbers

2017-05-17T19:08:24+00:00

[ Upstream commit d66bb1607e2d8d384e53f3d93db5c18483c8c4f7 ]

proc_create_mount_point() forgot to increase the parent's nlink, and
it resulted in unbalanced hard link numbers, e.g. /proc/fs shows one
less than expected.

Fixes: eb6d38d5427b ("proc: Allow creating permanently empty directories...")
Cc: stable@vger.kernel.org
Reported-by: Tristan Ye 
Signed-off-by: Takashi Iwai 
Signed-off-by: Eric W. Biederman 
Signed-off-by: Sasha Levin

fs: Give dentry to inode_change_ok() instead of inode

2016-12-23T13:56:35+00:00

[ Upstream commit 31051c85b5e2aaaf6315f74c72a732673632a905 ]

inode_change_ok() will be resposible for clearing capabilities and IMA
extended attributes and as such will need dentry. Give it as an argument
to inode_change_ok() instead of an inode. Also rename inode_change_ok()
to setattr_prepare() to better relect that it does also some
modifications in addition to checks.

References: CVE-2015-1350
Reviewed-by: Christoph Hellwig 
Signed-off-by: Jan Kara 
Signed-off-by: Philipp Hahn 
Signed-off-by: Sasha Levin

proc: Allow creating permanently empty directories that serve as mount points

2015-07-21T17:10:00+00:00

commit eb6d38d5427b3ad42f5268da0f1dd31bb0af1264 upstream.

Add a new function proc_create_mount_point that when used to creates a
directory that can not be added to.

Add a new function is_empty_pde to test if a function is a mount
point.

Update the code to use make_empty_dir_inode when reporting
a permanently empty directory to the vfs.

Update the code to not allow adding to permanently empty directories.

Update /proc/openprom and /proc/fs/nfsd to be permanently empty directories.

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: Greg Kroah-Hartman

VFS: normal filesystems (and lustre): d_inode() annotations

2015-04-15T19:06:57+00:00

that's the bulk of filesystem drivers dealing with inodes of their own

Signed-off-by: David Howells 
Signed-off-by: Al Viro

procfs: fix race between symlink removals and traversals

2015-02-22T16:43:12+00:00

use_pde()/unuse_pde() in ->follow_link()/->put_link() resp.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-02-17T22:56:45+00:00

Pull misc VFS updates from Al Viro:
 "This cycle a lot of stuff sits on topical branches, so I'll be sending
  more or less one pull request per branch.

  This is the first pile; more to follow in a few.  In this one are
  several misc commits from early in the cycle (before I went for
  separate branches), plus the rework of mntput/dput ordering on umount,
  switching to use of fs_pin instead of convoluted games in
  namespace_unlock()"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  switch the IO-triggering parts of umount to fs_pin
  new fs_pin killing logics
  allow attaching fs_pin to a group not associated with some superblock
  get rid of the second argument of acct_kill()
  take count and rcu_head out of fs_pin
  dcache: let the dentry count go down to zero without taking d_lock
  pull bumping refcount into ->kill()
  kill pin_put()
  mode_t whack-a-mole: chelsio
  file->f_path.dentry is pinned down for as long as the file is open...
  get rid of lustre_dump_dentry()
  gut proc_register() a bit
  kill d_validate()
  ncpfs: get rid of d_validate() nonsense
  selinuxfs: don't open-code d_genocide()

fs: proc: use PDE() to get proc_dir_entry

2015-02-13T02:54:12+00:00

Use the PDE() helper to get proc_dir_entry instead of coding it directly.

Signed-off-by: Alexander Kuleshov 
Acked-by: Nicolas Dichtel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gut proc_register() a bit

2015-01-26T04:16:26+00:00

There are only 3 callers and quite a bit of that thing is executed
exactly in one of those.  Just lift it there...

Signed-off-by: Al Viro

fs/proc.c: use rb_entry_safe() instead of rb_entry()

2014-12-11T01:41:09+00:00

Better to use existing macro that rewriting them.

Signed-off-by: Nicolas Dichtel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

procfs: fix error handling of proc_register()

2014-12-11T01:41:09+00:00

proc_register() error paths are leaking inodes and directory refcounts.

Signed-off-by: Debabrata Banerjee 
Cc: Alexander Viro 
Acked-by: Nicolas Dichtel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds