linux-toradex.git/kernel/capability.c, branch v3.15-rc6

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

2014-04-03T16:26:18+00:00

Pull security subsystem updates from James Morris:
 "Apart from reordering the SELinux mmap code to ensure DAC is called
  before MAC, these are minor maintenance updates"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (23 commits)
  selinux: correctly label /proc inodes in use before the policy is loaded
  selinux: put the mmap() DAC controls before the MAC controls
  selinux: fix the output of ./scripts/get_maintainer.pl for SELinux
  evm: enable key retention service automatically
  ima: skip memory allocation for empty files
  evm: EVM does not use MD5
  ima: return d_name.name if d_path fails
  integrity: fix checkpatch errors
  ima: fix erroneous removal of security.ima xattr
  security: integrity: Use a more current logging style
  MAINTAINERS: email updates and other misc. changes
  ima: reduce memory usage when a template containing the n field is used
  ima: restore the original behavior for sending data with ima template
  Integrity: Pass commname via get_task_comm()
  fs: move i_readcount
  ima: use static const char array definitions
  security: have cap_dentry_init_security return error
  ima: new helper: file_inode(file)
  kernel: Mark function as static in kernel/seccomp.c
  capability: Use current logging styles
  ...

capability: Use current logging styles

2014-02-24T03:44:53+00:00

Prefix logging output with "capability: " via pr_fmt.
Convert printks to pr_.
Use pr__once instead of guard flags.
Coalesce formats.

Signed-off-by: Joe Perches 
Acked-by: Serge E. Hallyn 
Signed-off-by: James Morris

audit: Simplify and correct audit_log_capset

2014-01-14T03:26:48+00:00

- Always report the current process as capset now always only works on
  the current process.  This prevents reporting 0 or a random pid in
  a random pid namespace.

- Don't bother to pass the pid as is available.

Signed-off-by: "Eric W. Biederman" 
(cherry picked from commit bcc85f0af31af123e32858069eb2ad8f39f90e67)
(cherry picked from commit f911cac4556a7a23e0b3ea850233d13b32328692)

Signed-off-by: Richard Guy Briggs 
[eparis: fix build error when audit disabled]
Signed-off-by: Eric Paris

Merge tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs

2013-09-09T18:19:09+00:00

Pull xfs updates from Ben Myers:
 "For 3.12-rc1 there are a number of bugfixes in addition to work to
  ease usage of shared code between libxfs and the kernel, the rest of
  the work to enable project and group quotas to be used simultaneously,
  performance optimisations in the log and the CIL, directory entry file
  type support, fixes for log space reservations, some spelling/grammar
  cleanups, and the addition of user namespace support.

   - introduce readahead to log recovery
   - add directory entry file type support
   - fix a number of spelling errors in comments
   - introduce new Q_XGETQSTATV quotactl for project quotas
   - add USER_NS support
   - log space reservation rework
   - CIL optimisations
  - kernel/userspace libxfs rework"

* tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs: (112 commits)
  xfs: XFS_MOUNT_QUOTA_ALL needed by userspace
  xfs: dtype changed xfs_dir2_sfe_put_ino to xfs_dir3_sfe_put_ino
  Fix wrong flag ASSERT in xfs_attr_shortform_getvalue
  xfs: finish removing IOP_* macros.
  xfs: inode log reservations are too small
  xfs: check correct status variable for xfs_inobt_get_rec() call
  xfs: inode buffers may not be valid during recovery readahead
  xfs: check LSN ordering for v5 superblocks during recovery
  xfs: btree block LSN escaping to disk uninitialised
  XFS: Assertion failed: first <= last && last < BBTOB(bp->b_length), file: fs/xfs/xfs_trans_buf.c, line: 568
  xfs: fix bad dquot buffer size in log recovery readahead
  xfs: don't account buffer cancellation during log recovery readahead
  xfs: check for underflow in xfs_iformat_fork()
  xfs: xfs_dir3_sfe_put_ino can be static
  xfs: introduce object readahead to log recovery
  xfs: Simplify xfs_ail_min() with list_first_entry_or_null()
  xfs: Register hotcpu notifier after initialization
  xfs: add xfs sb v4 support for dirent filetype field
  xfs: Add write support for dirent filetype field
  xfs: Add read-only support for dirent filetype field
  ...

userns: Kill nsown_capable it makes the wrong thing easy

2013-08-31T06:44:11+00:00

nsown_capable is a special case of ns_capable essentially for just CAP_SETUID and
CAP_SETGID.  For the existing users it doesn't noticably simplify things and
from the suggested patches I have seen it encourages people to do the wrong
thing.  So remove nsown_capable.

Acked-by: Serge Hallyn 
Signed-off-by: "Eric W. Biederman"

xfs: ioctl check for capabilities in the current user namespace

2013-08-15T19:19:25+00:00

Use inode_capable() to check if SUID|SGID bits should be cleared to match
similar check in inode_change_ok().

The check for CAP_LINUX_IMMUTABLE was not modified since all other file
systems also check against init_user_ns rather than current_user_ns.

Only allow changing of projid from init_user_ns.

Reviewed-by: Dave Chinner 
Reviewed-by: Gao feng 
Signed-off-by: Dwight Engen 
Signed-off-by: Ben Myers

Add file_ns_capable() helper function for open-time capability checking

2013-04-14T17:06:31+00:00

Nothing is using it yet, but this will allow us to delay the open-time
checks to use time, without breaking the normal UNIX permission
semantics where permissions are determined by the opener (and the file
descriptor can then be passed to a different process, or the process can
drop capabilities).

Signed-off-by: Linus Torvalds

userns: Teach inode_capable to understand inodes whose uids map to other namespaces.

2012-05-15T21:59:24+00:00

Acked-by: Serge Hallyn 
Signed-off-by: Eric W. Biederman

userns: Replace the hard to write inode_userns with inode_capable.

2012-04-08T00:02:46+00:00

This represents a change in strategy of how to handle user namespaces.
Instead of tagging everything explicitly with a user namespace and bulking
up all of the comparisons of uids and gids in the kernel,  all uids and gids
in use will have a mapping to a flat kuid and kgid spaces respectively.  This
allows much more of the existing logic to be preserved and in general
allows for faster code.

In this new and improved world we allow someone to utiliize capabilities
over an inode if the inodes owner mapps into the capabilities holders user
namespace and the user has capabilities in their user namespace.  Which
is simple and efficient.

Moving the fs uid comparisons to be comparisons in a flat kuid space
follows in later patches, something that is only significant if you
are using user namespaces.

Acked-by: Serge Hallyn 
Signed-off-by: Eric W. Biederman

Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call"

2012-01-17T18:19:41+00:00

This reverts commit d2a7009f0bb03fa22ad08dd25472efa0568126b9.

J. R. Okajima explains:

 "After this commit, I am afraid access(2) on NFS may not work
  correctly.  The scenario based upon my guess.
   - access(2) overrides the credentials.
   - calls inode_permission() -- ... -- generic_permission() --
      ns_capable().
   - while the old ns_capable() calls security_capable(current_cred()),
     the new ns_capable() calls has_ns_capability(current) --
     security_capable(__task_cred(t)).

  current_cred() returns current->cred which is effective (overridden)
  credentials, but __task_cred(current) returns current->real_cred (the
  NFSD's credential).  And the overridden credentials by access(2) lost."

Requested-by: J. R. Okajima 
Acked-by: Eric Paris 
Signed-off-by: Linus Torvalds