797 |
I was using PAGE_SIZE (4096 in many environments) |
I was using PAGE_SIZE (4096 in many environments) |
798 |
as the max length of any string data. |
as the max length of any string data. |
799 |
But for environments that have larger PAGE_SIZE, |
But for environments that have larger PAGE_SIZE, |
800 |
doing memset(ptr, 0, PAGE_SIZE) everytime is too wasteful. |
doing memset(ptr, 0, PAGE_SIZE) every time is too wasteful. |
801 |
|
|
802 |
Fix 2007/01/29 |
Fix 2007/01/29 |
803 |
|
|
1723 |
to see process information. The content of /proc/ccs/.execute_handler is |
to see process information. The content of /proc/ccs/.execute_handler is |
1724 |
identical to /proc/ccs/.process_status . |
identical to /proc/ccs/.process_status . |
1725 |
|
|
1726 |
Version 1.6.5 2008/11/11 Third anniversary release. |
Version 1.6.5 2008/11/11 Third anniversary release. |
1727 |
|
|
1728 |
Fix 2008/12/01 |
Fix 2008/12/01 |
1729 |
|
|
2243 |
/proc/ccs/profile (which results in not protecting the system at all), |
/proc/ccs/profile (which results in not protecting the system at all), |
2244 |
I added a check for PROFILE_VERSION= . |
I added a check for PROFILE_VERSION= . |
2245 |
|
|
2246 |
Version 1.7.1 2009/11/11 Fourth anniversary release. |
Version 1.7.1 2009/11/11 Fourth anniversary release. |
2247 |
|
|
2248 |
Fix 2009/11/13 |
Fix 2009/11/13 |
2249 |
|
|
2382 |
Since 1.7.0 , ccs_lport_reserved() was by error checking wrong port |
Since 1.7.0 , ccs_lport_reserved() was by error checking wrong port |
2383 |
number. As a result, "deny_autobind" keyword was not working as expected. |
number. As a result, "deny_autobind" keyword was not working as expected. |
2384 |
|
|
2385 |
Version 1.7.2 2010/04/01 Feature enhancement release. |
Version 1.7.2 2010/04/01 Feature enhancement release. |
2386 |
|
|
2387 |
Fix 2010/04/10 |
Fix 2010/04/10 |
2388 |
|
|
2441 |
permissions (e.g. allow_env PATH if symlink.target="/"), it triggered |
permissions (e.g. allow_env PATH if symlink.target="/"), it triggered |
2442 |
NULL pointer dereference. |
NULL pointer dereference. |
2443 |
|
|
2444 |
Fix 2010/10/05 |
Fix 2010/10/28 |
2445 |
|
|
2446 |
|
@ Fix umount() pathname calculation. |
2447 |
|
|
2448 |
|
"mount --bind /path/to/file1 /path/to/file2" is legal. |
2449 |
|
Therefore, "umount /path/to/file2" is also legal. |
2450 |
|
Do not automatically append trailing '/' if pathname to be unmounted |
2451 |
|
does not end with '/'. |
2452 |
|
|
2453 |
|
@ Add preserve KABI compatibility option. (2.6 kernels only) |
2454 |
|
|
2455 |
|
TOMOYO needs "struct ccs_domain_info *" and "u32" for each |
2456 |
|
"struct task_struct". But embedding these variables into |
2457 |
|
"struct task_struct" breaks KABI for prebuilt kernel modules (which |
2458 |
|
means that you will need to rebuild prebuilt kernel modules). |
2459 |
|
|
2460 |
|
Since KABI is commonly used (compared to 5 years ago), asking users to |
2461 |
|
rebuild kernel modules which are not included in kernel package is no |
2462 |
|
longer preferable. Therefore, I added a new option that keeps |
2463 |
|
"struct task_struct" unmodified in order to keep KABI. |
2464 |
|
|
2465 |
|
Note that you have to use ccs-patch-2.6.\*.diff which patches |
2466 |
|
kernel/fork.c in order to use this option. Otherwise, TOMOYO will leak |
2467 |
|
memory whenever "struct task_struct" is released. |
2468 |
|
|
2469 |
@ Change directives. |
@ Change directives. |
2470 |
|
|
2659 |
|
|
2660 |
This change allows you to jump to arbitrary domain. |
This change allows you to jump to arbitrary domain. |
2661 |
|
|
2662 |
|
Note that this change also reverts "Change /proc/ccs/info/self_domain ." |
2663 |
|
made on 2006/10/24. Now, 'cat < /proc/ccs/info/self_domain' will act like |
2664 |
|
'cat /proc/ccs/info/self_domain'. Programs depending on old assumption |
2665 |
|
need to be updated. |
2666 |
|
|
2667 |
@ Add "task auto_domain_transition". |
@ Add "task auto_domain_transition". |
2668 |
|
|
2669 |
This is similar to "task manual_domain_transition", but is automatically |
This is similar to "task manual_domain_transition", but is automatically |
2677 |
task manual_domain_transition <kernel> //./non-root task.uid!=0 |
task manual_domain_transition <kernel> //./non-root task.uid!=0 |
2678 |
|
|
2679 |
will jump to "<kernel> //./non-root" domain if current process's UID is |
will jump to "<kernel> //./non-root" domain if current process's UID is |
2680 |
not 0 and current process wrote "<kernel> //./non-root" + '\n' to |
not 0 and current process wrote "<kernel> //./non-root" to |
2681 |
/proc/ccs/.transition interface. |
/proc/ccs/self_domain interface. |
2682 |
|
|
2683 |
If domain transition failed, current process will be killed by SIGKILL |
If domain transition failed, current process will be killed by SIGKILL |
2684 |
signal. |
signal. |
2687 |
|
|
2688 |
I merged similar code in order to reduce object's filesize. |
I merged similar code in order to reduce object's filesize. |
2689 |
|
|
2690 |
Version 1.8.0 2010/XX/XX Feature enhancement release. |
Version 1.8.0 2010/11/11 Fifth anniversary release. |
2691 |
|
|
2692 |
|
Fix 2010/12/01 |
2693 |
|
|
2694 |
|
@ Use same interface for audit logs. |
2695 |
|
|
2696 |
|
To be able to perform fine grained filtering by /usr/sbin/ccs-auditd , |
2697 |
|
I merged /proc/ccs/grant_log and /proc/ccs/reject_log as |
2698 |
|
/proc/ccs/audit and added granted=yes or granted=no to audit logs. |
2699 |
|
|
2700 |
|
Fix 2010/12/17 |
2701 |
|
|
2702 |
|
@ Split ccs_null_security into ccs_default_security and ccs_oom_security. |
2703 |
|
|
2704 |
|
ccs_null_security is used by preserve KABI compatibility option and is |
2705 |
|
used for providing default values against threads which have not yet |
2706 |
|
allocated memory for their security contexts. |
2707 |
|
|
2708 |
|
If current thread failed to allocate memory for current thread's security |
2709 |
|
context, current thread uses ccs_null_security. Since current thread is |
2710 |
|
allowed to modify current thread's security context, current thread might |
2711 |
|
modify ccs_null_security which should not be modified for any reason. |
2712 |
|
|
2713 |
|
Therefore, I split ccs_null_security into ccs_default_security and |
2714 |
|
ccs_oom_security and use ccs_oom_security when current thread failed to |
2715 |
|
allocate memory for current thread's security context. |
2716 |
|
|
2717 |
|
Threads which do not share ccs_oom_security are not affected by threads |
2718 |
|
which share ccs_oom_security. Threads which share ccs_oom_security will |
2719 |
|
experience temporary inconsistency, but such threads are about to be |
2720 |
|
killed by SIGKILL signal. |
2721 |
|
|
2722 |
|
Fix 2011/01/11 |
2723 |
|
|
2724 |
|
@ Use filesystem name for unnamed devices when vfsmount is missing. |
2725 |
|
|
2726 |
|
"Change pathname for non-rename()able filesystems." changed to use |
2727 |
|
"$fsname:" if the filesystem does not support rename() operation and |
2728 |
|
"dev($major,$minor):" otherwise when vfsmount is missing. But it turned |
2729 |
|
out that it is useless to use "dev($major,$minor):" for unnamed devices |
2730 |
|
(filesystems with $major == 0). Thus, I changed to use "$fsname:" rather |
2731 |
|
than "dev($major,$minor):" for filesystems with $major == 0 when vfsmount |
2732 |
|
is missing. |
2733 |
|
|
2734 |
|
Fix 2011/02/07 |
2735 |
|
|
2736 |
|
@ Fix infinite loop bug when reading /proc/ccs/audit or /proc/ccs/query . |
2737 |
|
|
2738 |
|
In ccs_flush(), head->r.w[0] holds pointer to string data to be printed. |
2739 |
|
But head->r.w[0] was updated only when the string data was partially |
2740 |
|
printed (because head->r.w[0] will be updated by head->r.w[1] later if |
2741 |
|
completely printed). However, regarding /proc/ccs/audit and |
2742 |
|
/proc/ccs/query , an additional '\0' is printed after the string data was |
2743 |
|
completely printed. But if free space for read buffer became 0 before |
2744 |
|
printing the additional '\0', ccs_flush() was returning without updating |
2745 |
|
head->r.w[0]. As a result, ccs_flush() forever reprints already printed |
2746 |
|
string data. |
2747 |
|
|
2748 |
|
Fix 2011/03/01 |
2749 |
|
|
2750 |
|
@ Run garbage collector without waiting for /proc/ccs/ users. |
2751 |
|
|
2752 |
|
Currently TOMOYO holds SRCU lock upon open() and releases it upon close() |
2753 |
|
because list elements stored in the "struct ccs_io_buffer" instances are |
2754 |
|
accessed until close() is called. However, such SRCU usage causes lockdep |
2755 |
|
to complain about leaving the kernel with SRCU lock held. Therefore, |
2756 |
|
I changed to hold/release SRCU upon each read()/write() by selectively |
2757 |
|
deferring kfree() by keeping track of the "struct ccs_io_buffer" |
2758 |
|
instances. |
2759 |
|
|
2760 |
|
Fix 2011/03/05 |
2761 |
|
|
2762 |
|
@ Support built-in policy configuration. |
2763 |
|
|
2764 |
|
To be able to start using enforcing mode from the early stage of boot |
2765 |
|
sequence, I added support for built-in policy configuration and |
2766 |
|
activating access control without calling external policy loader program. |
2767 |
|
|
2768 |
|
This will be useful for systems where operations which can lead to the |
2769 |
|
hijacking of the boot sequence are needed before loading the policy. |
2770 |
|
For example, you can activate immediately after loading the fixed part of |
2771 |
|
policy which will allow only operations needed for mounting a partition |
2772 |
|
which contains the variant part of policy and verifying (e.g. running GPG |
2773 |
|
check) and loading the variant part of policy. Since you can start using |
2774 |
|
enforcing mode from the beginning, you can reduce the possibility of |
2775 |
|
hijacking the boot sequence. |
2776 |
|
|
2777 |
|
Fix 2011/03/10 |
2778 |
|
|
2779 |
|
@ Remove /proc/ccs/meminfo interface. |
2780 |
|
|
2781 |
|
Please use /proc/ccs/stat interface instead. |
2782 |
|
|
2783 |
|
Fix 2011/03/15 |
2784 |
|
|
2785 |
|
@ Pack policy when printing via /proc/ccs/ interface. |
2786 |
|
|
2787 |
|
The kernel side is ready for accepting packed input like |
2788 |
|
|
2789 |
|
file read/write/execute /path/to/file |
2790 |
|
|
2791 |
|
but was using unpacked output like |
2792 |
|
|
2793 |
|
file read /path/to/file |
2794 |
|
file write /path/to/file |
2795 |
|
file execute /path/to/file |
2796 |
|
|
2797 |
|
because most of userland tools were not ready for accepting packed input. |
2798 |
|
|
2799 |
|
The advantages of using packed policy are that it makes policy files |
2800 |
|
smaller and it speeds up loading/saving policy files. |
2801 |
|
|
2802 |
|
Since most of userland tools are ready for accepting packed input by now, |
2803 |
|
I changed to use packed policy for both input and output. |
2804 |
|
|
2805 |
|
Fix 2011/03/31 |
2806 |
|
|
2807 |
|
@ Fix conditional policy parsing. |
2808 |
|
|
2809 |
|
Since exec.realpath= and symlink.target= accept path_group, |
2810 |
|
symlink.target="@foo" was by error parsed as symlink.target=@foo . |
2811 |
|
|
2812 |
|
@ Serialize updating profile's comment line. |
2813 |
|
|
2814 |
|
We need to serialize when updating COMMENT= line in /proc/ccs/profile . |
2815 |
|
|
2816 |
|
Version 1.8.1 2011/04/01 Usability enhancement with "Zettai, Daijoubudayo" release! |
2817 |
|
|
2818 |
|
Fix 2011/04/03 |
2819 |
|
|
2820 |
|
@ Fix fcntl(F_SETFL, O_APPEND) handling. |
2821 |
|
|
2822 |
|
Since 1.8.0, TOMOYO was by error checking "file write" permission rather |
2823 |
|
than "file append" permission when changing file's writing mode from |
2824 |
|
"overwriting" to "append". |
2825 |
|
|
2826 |
|
This error should impact little (except CentOS 6.0 kernels) because once |
2827 |
|
a file was opened for "overwriting" mode, changing that file to "append" |
2828 |
|
mode cannot undo overwriting the file. Regarding CentOS 6.0 kernels, |
2829 |
|
due to different ACC_MODE definition, TOMOYO was by error needlessly |
2830 |
|
checking "file read" permission when fcntl() was requested. |
2831 |
|
|
2832 |
|
Fix 2011/04/20 |
2833 |
|
|
2834 |
|
@ Remove unused "struct inode *" parameter from hooks. |
2835 |
|
|
2836 |
|
Since pre-vfs functions were removed on 2010/09/18, "struct inode *" |
2837 |
|
parameter which was used for checking parent directory's DAC permission |
2838 |
|
is no longer used. |
2839 |
|
|
2840 |
|
Note that "struct ccsecurity_operations ccsecurity_ops" has changed. |
2841 |
|
Loadable kernel modules that depends on it need to be rebuilt. |
2842 |
|
|
2843 |
|
Fix 2011/05/05 |
2844 |
|
|
2845 |
|
@ Fix wrong profile number in audit logs for "misc env" permission. |
2846 |
|
|
2847 |
|
Profile number used for "file execute" permission was by error reused |
2848 |
|
when generating audit logs for "misc env" permission. |
2849 |
|
|
2850 |
|
Fix 2011/05/11 |
2851 |
|
|
2852 |
|
@ Fix wrong domainname validation. |
2853 |
|
|
2854 |
|
"<kernel>" + "/foo/\" + "/bar" was by error checked when |
2855 |
|
"<kernel> /foo/\* /bar" was given. As a result, legal domainnames like |
2856 |
|
"<kernel> /foo/\* /bar" are rejected. |
2857 |
|
|
2858 |
|
Fix 2011/06/06 |
2859 |
|
|
2860 |
|
@ Add policy namespace support. |
2861 |
|
|
2862 |
|
To be able to use TOMOYO in LXC environments, I introduced policy |
2863 |
|
namespace. Each policy namespace has its own set of domain policy, |
2864 |
|
exception policy and profiles, which are all independent of other |
2865 |
|
namespaces. |
2866 |
|
|
2867 |
|
@ Remove CONFIG_CCSECURITY_BUILTIN_INITIALIZERS option. |
2868 |
|
|
2869 |
|
From now on, exception policy and manager need to be able to handle |
2870 |
|
policy namespace (which is a <$namespace> prefix added to each line). |
2871 |
|
Thus, space-separated list for CONFIG_CCSECURITY_BUILTIN_INITIALIZERS is |
2872 |
|
no longer suitable for handling policy namespace. |
2873 |
|
|
2874 |
|
Fix 2011/06/10 |
2875 |
|
|
2876 |
|
@ Allow specifying trigger for activation. |
2877 |
|
|
2878 |
|
To be able to use TOMOYO under systemd environments where init= parameter |
2879 |
|
is used, I changed to allow overriding the trigger for calling external |
2880 |
|
policy loader and activating MAC via kernel command line options. |
2881 |
|
|
2882 |
|
Fix 2011/06/14 |
2883 |
|
|
2884 |
|
@ Remove unused "struct inode *" parameter from ccs-patch-\*.diff . |
2885 |
|
|
2886 |
|
To follow changes I made on 2011/04/20, I removed "struct inode *" from |
2887 |
|
ccs_mknod_permission(), ccs_mkdir_permission(), ccs_rmdir_permission(), |
2888 |
|
ccs_unlink_permission(), ccs_symlink_permission(), ccs_link_permission(), |
2889 |
|
ccs_rename_permission() that are called from fs/namei.c |
2890 |
|
net/unix/af_unix.c include/linux/security.c security/security.c . |
2891 |
|
If you have your own ccs-patch-*.diff , please update accordingly. |
2892 |
|
|
2893 |
|
Version 1.8.2 2011/06/20 Usability enhancement release. |
2894 |
|
|
2895 |
|
Fix 2011/07/07 |
2896 |
|
|
2897 |
|
@ Remove /proc/ccs/.domain_status interface. |
2898 |
|
|
2899 |
|
Writing to /proc/ccs/.domain_status can be emulated by |
2900 |
|
|
2901 |
|
( echo "select " $domainname; echo "use_profile " $profile ) | |
2902 |
|
/usr/sbin/ccs-loadpolicy -d |
2903 |
|
|
2904 |
|
and reading from /proc/ccs/.domain_status can be emulated by |
2905 |
|
|
2906 |
|
grep -A 1 '^<' /proc/ccs/domain_policy | |
2907 |
|
awk ' { if ( domainname == "" ) { if ( substr($1, 1, 1) == "<" ) |
2908 |
|
domainname = $0; } else if ( $1 == "use_profile" ) { |
2909 |
|
print $2 " " domainname; domainname = ""; } } ; ' |
2910 |
|
|
2911 |
|
. Since this interface is used by only /usr/sbin/ccs-setprofile , |
2912 |
|
remove this interface by updating /usr/sbin/ccs-setprofile . |
2913 |
|
|
2914 |
|
Fix 2011/07/09 |
2915 |
|
|
2916 |
|
@ Fix /proc/ccs/stat parser. |
2917 |
|
|
2918 |
|
For optimization, I changed to use simple_strtoul() rather than sscanf() |
2919 |
|
in ccs_write_stat(). But it caused parsing failure if space is inserted |
2920 |
|
before value (e.g. "Memory used by policy: $value"). |
2921 |
|
|
2922 |
|
Fix 2011/07/13 |
2923 |
|
|
2924 |
|
@ Accept "::" notation for IPv6 address. |
2925 |
|
|
2926 |
|
In order to add network access restriction to TOMOYO 2.4, I backported |
2927 |
|
routines for parsing/printing IPv4/IPv6 address from kernel 3.0 into |
2928 |
|
TOMOYO 1.8.2. |
2929 |
|
Now, IPv6 address accepts "::1" instead of "0:0:0:0:0:0:0:1". |
2930 |
|
|
2931 |
|
Fix 2011/09/03 |
2932 |
|
|
2933 |
|
@ Avoid race when retrying "file execute" permission check. |
2934 |
|
|
2935 |
|
There was a race window that the pathname which is subjected to |
2936 |
|
"file execute" permission check when retrying via supervisor's decision |
2937 |
|
because the pathname was recalculated upon retry. Though, there is an |
2938 |
|
inevitable race window even without supervisor, for we have to calculate |
2939 |
|
the symbolic link's pathname from "struct linux_binprm"->filename rather |
2940 |
|
than from "struct linux_binprm"->file because we cannot back calculate |
2941 |
|
the symbolic link's pathname from the dereferenced pathname. |
2942 |
|
|
2943 |
|
@ Remove unneeded daemonize(). |
2944 |
|
|
2945 |
|
Garbage collector thread is created using kthread_create() since 2.6.7. |
2946 |
|
Kernel threads created by kthread_create() does not need to call |
2947 |
|
daemonize(). |
2948 |
|
|
2949 |
|
Fix 2011/09/16 |
2950 |
|
|
2951 |
|
@ Allow specifying domain transition preference. |
2952 |
|
|
2953 |
|
I got an opinion that it is difficult to use exception policy's domain |
2954 |
|
transition control directives because they need to match the pathname |
2955 |
|
specified to "file execute" directives. For example, if "file execute |
2956 |
|
/bin/\*\-ls\-cat" is given, corresponding domain transition control |
2957 |
|
directive needs to be like "no_keep_domain /bin/\*\-ls\-cat from any". |
2958 |
|
|
2959 |
|
To solve this difficulty, I introduced optional argument that supersedes |
2960 |
|
exception policy's domain transition control directives. |
2961 |
|
|
2962 |
|
file execute /bin/ls keep exec.realpath="/bin/ls" exec.argv[0]="ls" |
2963 |
|
file execute /bin/cat keep exec.realpath="/bin/cat" exec.argv[0]="cat" |
2964 |
|
file execute /bin/\*\-ls\-cat child |
2965 |
|
file execute /usr/sbin/httpd <apache> exec.realpath="/usr/sbin/httpd" exec.argv[0]="/usr/sbin/httpd" |
2966 |
|
|
2967 |
|
This argument allows transition to different domains based on conditions. |
2968 |
|
|
2969 |
|
<kernel> /usr/sbin/sshd |
2970 |
|
file execute /bin/bash <kernel> /usr/sbin/sshd //batch-session exec.argc=2 exec.argv[1]="-c" |
2971 |
|
file execute /bin/bash <kernel> /usr/sbin/sshd //root-session task.uid=0 |
2972 |
|
file execute /bin/bash <kernel> /usr/sbin/sshd //nonroot-session task.uid!=0 |
2973 |
|
|
2974 |
|
Fix 2011/09/25 |
2975 |
|
|
2976 |
|
@ Simplify garbage collector. |
2977 |
|
|
2978 |
|
It turned out that use of batched processing tends to choke garbage |
2979 |
|
collector when certain pattern of entries are queued. Thus, I replaced it |
2980 |
|
with sequential processing. |
2981 |
|
|
2982 |
|
Version 1.8.3 2011/09/29 Usability enhancement release. |