1. 27 7月, 2008 2 次提交
  2. 14 7月, 2008 6 次提交
  3. 30 4月, 2008 2 次提交
  4. 29 4月, 2008 2 次提交
  5. 28 4月, 2008 1 次提交
    • A
      capabilities: implement per-process securebits · 3898b1b4
      Andrew G. Morgan 提交于
      Filesystem capability support makes it possible to do away with (set)uid-0
      based privilege and use capabilities instead.  That is, with filesystem
      support for capabilities but without this present patch, it is (conceptually)
      possible to manage a system with capabilities alone and never need to obtain
      privilege via (set)uid-0.
      
      Of course, conceptually isn't quite the same as currently possible since few
      user applications, certainly not enough to run a viable system, are currently
      prepared to leverage capabilities to exercise privilege.  Further, many
      applications exist that may never get upgraded in this way, and the kernel
      will continue to want to support their setuid-0 base privilege needs.
      
      Where pure-capability applications evolve and replace setuid-0 binaries, it is
      desirable that there be a mechanisms by which they can contain their
      privilege.  In addition to leveraging the per-process bounding and inheritable
      sets, this should include suppressing the privilege of the uid-0 superuser
      from the process' tree of children.
      
      The feature added by this patch can be leveraged to suppress the privilege
      associated with (set)uid-0.  This suppression requires CAP_SETPCAP to
      initiate, and only immediately affects the 'current' process (it is inherited
      through fork()/exec()).  This reimplementation differs significantly from the
      historical support for securebits which was system-wide, unwieldy and which
      has ultimately withered to a dead relic in the source of the modern kernel.
      
      With this patch applied a process, that is capable(CAP_SETPCAP), can now drop
      all legacy privilege (through uid=0) for itself and all subsequently
      fork()'d/exec()'d children with:
      
        prctl(PR_SET_SECUREBITS, 0x2f);
      
      This patch represents a no-op unless CONFIG_SECURITY_FILE_CAPABILITIES is
      enabled at configure time.
      
      [akpm@linux-foundation.org: fix uninitialised var warning]
      [serue@us.ibm.com: capabilities: use cap_task_prctl when !CONFIG_SECURITY]
      Signed-off-by: NAndrew G. Morgan <morgan@kernel.org>
      Acked-by: NSerge Hallyn <serue@us.ibm.com>
      Reviewed-by: NJames Morris <jmorris@namei.org>
      Cc: Stephen Smalley <sds@tycho.nsa.gov>
      Cc: Paul Moore <paul.moore@hp.com>
      Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      3898b1b4
  6. 22 4月, 2008 1 次提交
  7. 19 4月, 2008 4 次提交
  8. 18 4月, 2008 1 次提交
  9. 13 4月, 2008 1 次提交
  10. 06 3月, 2008 1 次提交
  11. 06 2月, 2008 2 次提交
  12. 25 1月, 2008 3 次提交
    • D
      security: add a secctx_to_secid() hook · 63cb3449
      David Howells 提交于
      Add a secctx_to_secid() LSM hook to go along with the existing
      secid_to_secctx() LSM hook.  This patch also includes the SELinux
      implementation for this hook.
      Signed-off-by: NPaul Moore <paul.moore@hp.com>
      Acked-by: NStephen Smalley <sds@tycho.nsa.gov>
      Signed-off-by: NJames Morris <jmorris@namei.org>
      63cb3449
    • H
      security: remove security_sb_post_mountroot hook · bced9528
      H. Peter Anvin 提交于
      The security_sb_post_mountroot() hook is long-since obsolete, and is
      fundamentally broken: it is never invoked if someone uses initramfs.
      This is particularly damaging, because the existence of this hook has
      been used as motivation for not using initramfs.
      
      Stephen Smalley confirmed on 2007-07-19 that this hook was originally
      used by SELinux but can now be safely removed:
      
           http://marc.info/?l=linux-kernel&m=118485683612916&w=2
      
      Cc: Stephen Smalley <sds@tycho.nsa.gov>
      Cc: James Morris <jmorris@namei.org>
      Cc: Eric Paris <eparis@parisplace.org>
      Cc: Chris Wright <chrisw@sous-sol.org>
      Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      Signed-off-by: NJames Morris <jmorris@namei.org>
      bced9528
    • E
      Security: add get, set, and cloning of superblock security information · c9180a57
      Eric Paris 提交于
      Adds security_get_sb_mnt_opts, security_set_sb_mnt_opts, and
      security_clont_sb_mnt_opts to the LSM and to SELinux.  This will allow
      filesystems to directly own and control all of their mount options if they
      so choose.  This interface deals only with option identifiers and strings so
      it should generic enough for any LSM which may come in the future.
      
      Filesystems which pass text mount data around in the kernel (almost all of
      them) need not currently make use of this interface when dealing with
      SELinux since it will still parse those strings as it always has.  I assume
      future LSM's would do the same.  NFS is the primary FS which does not use
      text mount data and thus must make use of this interface.
      
      An LSM would need to implement these functions only if they had mount time
      options, such as selinux has context= or fscontext=.  If the LSM has no
      mount time options they could simply not implement and let the dummy ops
      take care of things.
      
      An LSM other than SELinux would need to define new option numbers in
      security.h and any FS which decides to own there own security options would
      need to be patched to use this new interface for every possible LSM.  This
      is because it was stated to me very clearly that LSM's should not attempt to
      understand FS mount data and the burdon to understand security should be in
      the FS which owns the options.
      Signed-off-by: NEric Paris <eparis@redhat.com>
      Acked-by: NStephen D. Smalley <sds@tycho.nsa.gov>
      Signed-off-by: NJames Morris <jmorris@namei.org>
      c9180a57
  13. 17 10月, 2007 3 次提交
    • A
      security/ cleanups · cbfee345
      Adrian Bunk 提交于
      This patch contains the following cleanups that are now possible:
      - remove the unused security_operations->inode_xattr_getsuffix
      - remove the no longer used security_operations->unregister_security
      - remove some no longer required exit code
      - remove a bunch of no longer used exports
      Signed-off-by: NAdrian Bunk <bunk@kernel.org>
      Acked-by: NJames Morris <jmorris@namei.org>
      Cc: Chris Wright <chrisw@sous-sol.org>
      Cc: Stephen Smalley <sds@tycho.nsa.gov>
      Cc: Serge Hallyn <serue@us.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      cbfee345
    • S
      Implement file posix capabilities · b5376771
      Serge E. Hallyn 提交于
      Implement file posix capabilities.  This allows programs to be given a
      subset of root's powers regardless of who runs them, without having to use
      setuid and giving the binary all of root's powers.
      
      This version works with Kaigai Kohei's userspace tools, found at
      http://www.kaigai.gr.jp/index.php.  For more information on how to use this
      patch, Chris Friedhoff has posted a nice page at
      http://www.friedhoff.org/fscaps.html.
      
      Changelog:
      	Nov 27:
      	Incorporate fixes from Andrew Morton
      	(security-introduce-file-caps-tweaks and
      	security-introduce-file-caps-warning-fix)
      	Fix Kconfig dependency.
      	Fix change signaling behavior when file caps are not compiled in.
      
      	Nov 13:
      	Integrate comments from Alexey: Remove CONFIG_ ifdef from
      	capability.h, and use %zd for printing a size_t.
      
      	Nov 13:
      	Fix endianness warnings by sparse as suggested by Alexey
      	Dobriyan.
      
      	Nov 09:
      	Address warnings of unused variables at cap_bprm_set_security
      	when file capabilities are disabled, and simultaneously clean
      	up the code a little, by pulling the new code into a helper
      	function.
      
      	Nov 08:
      	For pointers to required userspace tools and how to use
      	them, see http://www.friedhoff.org/fscaps.html.
      
      	Nov 07:
      	Fix the calculation of the highest bit checked in
      	check_cap_sanity().
      
      	Nov 07:
      	Allow file caps to be enabled without CONFIG_SECURITY, since
      	capabilities are the default.
      	Hook cap_task_setscheduler when !CONFIG_SECURITY.
      	Move capable(TASK_KILL) to end of cap_task_kill to reduce
      	audit messages.
      
      	Nov 05:
      	Add secondary calls in selinux/hooks.c to task_setioprio and
      	task_setscheduler so that selinux and capabilities with file
      	cap support can be stacked.
      
      	Sep 05:
      	As Seth Arnold points out, uid checks are out of place
      	for capability code.
      
      	Sep 01:
      	Define task_setscheduler, task_setioprio, cap_task_kill, and
      	task_setnice to make sure a user cannot affect a process in which
      	they called a program with some fscaps.
      
      	One remaining question is the note under task_setscheduler: are we
      	ok with CAP_SYS_NICE being sufficient to confine a process to a
      	cpuset?
      
      	It is a semantic change, as without fsccaps, attach_task doesn't
      	allow CAP_SYS_NICE to override the uid equivalence check.  But since
      	it uses security_task_setscheduler, which elsewhere is used where
      	CAP_SYS_NICE can be used to override the uid equivalence check,
      	fixing it might be tough.
      
      	     task_setscheduler
      		 note: this also controls cpuset:attach_task.  Are we ok with
      		     CAP_SYS_NICE being used to confine to a cpuset?
      	     task_setioprio
      	     task_setnice
      		 sys_setpriority uses this (through set_one_prio) for another
      		 process.  Need same checks as setrlimit
      
      	Aug 21:
      	Updated secureexec implementation to reflect the fact that
      	euid and uid might be the same and nonzero, but the process
      	might still have elevated caps.
      
      	Aug 15:
      	Handle endianness of xattrs.
      	Enforce capability version match between kernel and disk.
      	Enforce that no bits beyond the known max capability are
      	set, else return -EPERM.
      	With this extra processing, it may be worth reconsidering
      	doing all the work at bprm_set_security rather than
      	d_instantiate.
      
      	Aug 10:
      	Always call getxattr at bprm_set_security, rather than
      	caching it at d_instantiate.
      
      [morgan@kernel.org: file-caps clean up for linux/capability.h]
      [bunk@kernel.org: unexport cap_inode_killpriv]
      Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
      Cc: Stephen Smalley <sds@tycho.nsa.gov>
      Cc: James Morris <jmorris@namei.org>
      Cc: Chris Wright <chrisw@sous-sol.org>
      Cc: Andrew Morgan <morgan@kernel.org>
      Signed-off-by: NAndrew Morgan <morgan@kernel.org>
      Signed-off-by: NAdrian Bunk <bunk@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      b5376771
    • J
      security: Convert LSM into a static interface · 20510f2f
      James Morris 提交于
      Convert LSM into a static interface, as the ability to unload a security
      module is not required by in-tree users and potentially complicates the
      overall security architecture.
      
      Needlessly exported LSM symbols have been unexported, to help reduce API
      abuse.
      
      Parameters for the capability and root_plug modules are now specified
      at boot.
      
      The SECURITY_FRAMEWORK_VERSION macro has also been removed.
      
      In a nutshell, there is no safe way to unload an LSM.  The modular interface
      is thus unecessary and broken infrastructure.  It is used only by out-of-tree
      modules, which are often binary-only, illegal, abusive of the API and
      dangerous, e.g.  silently re-vectoring SELinux.
      
      [akpm@linux-foundation.org: cleanups]
      [akpm@linux-foundation.org: USB Kconfig fix]
      [randy.dunlap@oracle.com: fix LSM kernel-doc]
      Signed-off-by: NJames Morris <jmorris@namei.org>
      Acked-by: NChris Wright <chrisw@sous-sol.org>
      Cc: Stephen Smalley <sds@tycho.nsa.gov>
      Cc: "Serge E. Hallyn" <serue@us.ibm.com>
      Acked-by: NArjan van de Ven <arjan@infradead.org>
      Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      20510f2f
  14. 12 7月, 2007 2 次提交
  15. 15 2月, 2007 1 次提交
    • T
      [PATCH] remove many unneeded #includes of sched.h · cd354f1a
      Tim Schmielau 提交于
      After Al Viro (finally) succeeded in removing the sched.h #include in module.h
      recently, it makes sense again to remove other superfluous sched.h includes.
      There are quite a lot of files which include it but don't actually need
      anything defined in there.  Presumably these includes were once needed for
      macros that used to live in sched.h, but moved to other header files in the
      course of cleaning it up.
      
      To ease the pain, this time I did not fiddle with any header files and only
      removed #includes from .c-files, which tend to cause less trouble.
      
      Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
      arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
      allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
      configs in arch/arm/configs on arm.  I also checked that no new warnings were
      introduced by the patch (actually, some warnings are removed that were emitted
      by unnecessarily included header files).
      Signed-off-by: NTim Schmielau <tim@physik3.uni-rostock.de>
      Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      cd354f1a
  16. 01 7月, 2006 1 次提交
  17. 26 3月, 2006 1 次提交
  18. 12 1月, 2006 1 次提交
  19. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4