linux-kernel - Re: [TOMOYO] Add garbage collector support.

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Date:	Fri, 08 May 2009 11:10:21 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:	jmorris@...ei.org
Cc:	pavel@....cz, linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [TOMOYO] Add garbage collector support.

James Morris wrote:
> > James, it is possible to apply below commits to security-testing-2.6#next ?
> > I get a lot of warning messages in my environment.
> 
> Please elaborate.

Without commits

  mm: pass correct mm when growing stack
  Revert "kobject: don't block for each kobject_uevent".
  x86: clean up old gcc warnings

I get compiler warnings

  # make init/main.o
  scripts/kconfig/conf -s arch/x86/Kconfig
    CHK     include/linux/version.h
    CHK     include/linux/utsrelease.h
    SYMLINK include/asm -> include/asm-x86
    CALL    scripts/checksyscalls.sh
    CC      init/main.o
  In file included from /usr/src/all/security-testing-2.6.git/arch/x86/include/asm/page.h:8,
                   from /usr/src/all/security-testing-2.6.git/arch/x86/include/asm/processor.h:18,
                   from include/linux/prefetch.h:14,
                   from include/linux/list.h:6,
                   from include/linux/module.h:9,
                   from init/main.c:13:
  /usr/src/all/security-testing-2.6.git/arch/x86/include/asm/page_types.h:48: warning: parameter has incomplete type
  /usr/src/all/security-testing-2.6.git/arch/x86/include/asm/page_types.h:50: warning: parameter has incomplete type

and runtime warnings

  ------------[ cut here ]------------
  WARNING: at security/security.c:217 security_vm_enough_memory+0x9b/0xb0()
  Hardware name: VMware Virtual Platform
  Modules linked in: pcnet32 crc32
  Pid: 3277, comm: khelper Not tainted 2.6.29 #3
  Call Trace:
   [<c015f400>] ? zap_locks+0x110/0x130
   [<c015e5fd>] warn_slowpath+0x8d/0xf0
   [<c019b2ec>] ? validate_chain+0x3fc/0x540
   [<c019b2ec>] ? validate_chain+0x3fc/0x540
   [<c019d79c>] ? __lock_acquire+0x29c/0x8b0
   [<c019f159>] ? __lock_acquired+0x109/0x1c0
   [<c035bbdb>] security_vm_enough_memory+0x9b/0xb0
   [<c02089bb>] acct_stack_growth+0xcb/0x190
   [<c0208ba1>] expand_downwards+0x121/0x1a0
   [<c0208c3d>] expand_stack+0xd/0x10
   [<c0208cdd>] find_extend_vma+0x9d/0x130
   [<c01ff5d5>] __get_user_pages+0x95/0x6c0
   [<c01ffc73>] get_user_pages+0x73/0x90
   [<c0233cd8>] get_arg_page+0x48/0x130
   [<c02342a5>] copy_strings+0x165/0x2f0
   [<c02366ba>] do_execve+0x31a/0x900
   [<c010252a>] sys_execve+0x5a/0xb0
   [<c01040b4>] syscall_call+0x7/0xb
   [<c010b624>] ? kernel_execve+0x24/0x30
   [<c017ab73>] ? ____call_usermodehelper+0x103/0x190
   [<c017aa70>] ? ____call_usermodehelper+0x0/0x190
   [<c0104a73>] ? kernel_thread_helper+0x7/0x10
  ---[ end trace 636cdcc028137283 ]---

in my environment.

These commits are already in 2.6.30-rc4.
These warnings will disappear when security-testing-2.6#next is refreshed
using 2.6.30-rcX . But security-testing-2.6#next is using 2.6.29.
Thus, I wished these commits applied to security-testing-2.6#next
if there is no problem.
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