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2011-12-08TOMOYO: Fix pathname handling of disconnected paths.Tetsuo Handa1-1/+9
Current tomoyo_realpath_from_path() implementation returns strange pathname when calculating pathname of a file which belongs to lazy unmounted tree. Use local pathname rather than strange absolute pathname in that case. Also, this patch fixes a regression by commit 02125a82 "fix apparmor dereferencing potentially freed dentry, sanitize __d_path() API". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-12-06fix apparmor dereferencing potentially freed dentry, sanitize __d_path() APIAl Viro1-2/+1
__d_path() API is asking for trouble and in case of apparmor d_namespace_path() getting just that. The root cause is that when __d_path() misses the root it had been told to look for, it stores the location of the most remote ancestor in *root. Without grabbing references. Sure, at the moment of call it had been pinned down by what we have in *path. And if we raced with umount -l, we could have very well stopped at vfsmount/dentry that got freed as soon as prepend_path() dropped vfsmount_lock. It is safe to compare these pointers with pre-existing (and known to be still alive) vfsmount and dentry, as long as all we are asking is "is it the same address?". Dereferencing is not safe and apparmor ended up stepping into that. d_namespace_path() really wants to examine the place where we stopped, even if it's not connected to our namespace. As the result, it looked at ->d_sb->s_magic of a dentry that might've been already freed by that point. All other callers had been careful enough to avoid that, but it's really a bad interface - it invites that kind of trouble. The fix is fairly straightforward, even though it's bigger than I'd like: * prepend_path() root argument becomes const. * __d_path() is never called with NULL/NULL root. It was a kludge to start with. Instead, we have an explicit function - d_absolute_root(). Same as __d_path(), except that it doesn't get root passed and stops where it stops. apparmor and tomoyo are using it. * __d_path() returns NULL on path outside of root. The main caller is show_mountinfo() and that's precisely what we pass root for - to skip those outside chroot jail. Those who don't want that can (and do) use d_path(). * __d_path() root argument becomes const. Everyone agrees, I hope. * apparmor does *NOT* try to use __d_path() or any of its variants when it sees that path->mnt is an internal vfsmount. In that case it's definitely not mounted anywhere and dentry_path() is exactly what we want there. Handling of sysctl()-triggered weirdness is moved to that place. * if apparmor is asked to do pathname relative to chroot jail and __d_path() tells it we it's not in that jail, the sucker just calls d_absolute_path() instead. That's the other remaining caller of __d_path(), BTW. * seq_path_root() does _NOT_ return -ENAMETOOLONG (it's stupid anyway - the normal seq_file logics will take care of growing the buffer and redoing the call of ->show() just fine). However, if it gets path not reachable from root, it returns SEQ_SKIP. The only caller adjusted (i.e. stopped ignoring the return value as it used to do). Reviewed-by: John Johansen <john.johansen@canonical.com> ACKed-by: John Johansen <john.johansen@canonical.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@vger.kernel.org
2011-11-02Merge branch 'for-linus' of git://git.selinuxproject.org/~jmorris/linux-securityLinus Torvalds1-0/+30
* 'for-linus' of git://git.selinuxproject.org/~jmorris/linux-security: TOMOYO: Fix interactive judgment functionality.
2011-10-29TOMOYO: Fix interactive judgment functionality.Tetsuo Handa1-0/+30
Commit 17fcfbd9 "TOMOYO: Add interactive enforcing mode." introduced ability to query access decision using userspace programs. It was using global PID for reaching policy configuration of the process. However, use of PID returns stale policy configuration when the process's subjective credentials and objective credentials differ. Fix this problem by allowing reaching policy configuration via query id. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-10-25Merge branch 'next' of git://selinuxproject.org/~jmorris/linux-securityLinus Torvalds17-454/+2128
* 'next' of git://selinuxproject.org/~jmorris/linux-security: (95 commits) TOMOYO: Fix incomplete read after seek. Smack: allow to access /smack/access as normal user TOMOYO: Fix unused kernel config option. Smack: fix: invalid length set for the result of /smack/access Smack: compilation fix Smack: fix for /smack/access output, use string instead of byte Smack: domain transition protections (v3) Smack: Provide information for UDS getsockopt(SO_PEERCRED) Smack: Clean up comments Smack: Repair processing of fcntl Smack: Rule list lookup performance Smack: check permissions from user space (v2) TOMOYO: Fix quota and garbage collector. TOMOYO: Remove redundant tasklist_lock. TOMOYO: Fix domain transition failure warning. TOMOYO: Remove tomoyo_policy_memory_lock spinlock. TOMOYO: Simplify garbage collector. TOMOYO: Fix make namespacecheck warnings. target: check hex2bin result encrypted-keys: check hex2bin result ...
2011-10-22TOMOYO: Fix incomplete read after seek.Tetsuo Handa1-0/+1
Commit f23571e8 "TOMOYO: Copy directly to userspace buffer." introduced tomoyo_flush() that flushes data to be read as soon as possible. tomoyo_select_domain() (which is called by write()) enqueues data which meant to be read by next read(), but previous read()'s read buffer's size was not cleared. As a result, since 2.6.36, sequence like char *cp = "select global-pid=1\n"; read(fd, buf1, sizeof(buf1)); write(fd, cp, strlen(cp)); read(fd, buf2, sizeof(buf2)); causes enqueued data to be flushed to buf1 rather than buf2. Fix this bug by clearing read buffer's size upon write() request. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-10-19TOMOYO: Fix unused kernel config option.Tetsuo Handa1-2/+4
CONFIG_SECURITY_TOMOYO_MAX_{ACCEPT_ENTRY,AUDIT_LOG} introduced by commit 0e4ae0e0 "TOMOYO: Make several options configurable." were by error not used. Reported-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-10-12TOMOYO: Fix quota and garbage collector.Tetsuo Handa2-0/+18
Commit 059d84db "TOMOYO: Add socket operation restriction support" and commit 731d37aa "TOMOYO: Allow domain transition without execve()." forgot to update tomoyo_domain_quota_is_ok() and tomoyo_del_acl() which results in incorrect quota counting and memory leak. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-10-12TOMOYO: Remove redundant tasklist_lock.Tetsuo Handa1-4/+0
rcu_read_lock() is sufficient for calling find_task_by_pid_ns()/find_task_by_vpid(). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-28TOMOYO: Fix domain transition failure warning.Tetsuo Handa1-1/+2
Commit bd03a3e4 "TOMOYO: Add policy namespace support." introduced policy namespace. But as of /sbin/modprobe is executed from initramfs/initrd, profiles for target domain's namespace is not defined because /sbin/tomoyo-init is not yet called. Reported-by: Jamie Nguyen <jamie@tomoyolinux.co.uk> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-26TOMOYO: Remove tomoyo_policy_memory_lock spinlock.Tetsuo Handa3-27/+27
tomoyo_policy_lock mutex already protects it. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-26TOMOYO: Simplify garbage collector.Tetsuo Handa5-319/+186
When TOMOYO started using garbage collector at commit 847b173e "TOMOYO: Add garbage collector.", we waited for close() before kfree(). Thus, elements to be kfree()d were queued up using tomoyo_gc_list list. But it turned out that tomoyo_element_linked_by_gc() tends to choke garbage collector when certain pattern of entries are queued. Since garbage collector is no longer waiting for close() since commit 2e503bbb "TOMOYO: Fix lockdep warning.", we can remove tomoyo_gc_list list and tomoyo_element_linked_by_gc() by doing sequential processing. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-26TOMOYO: Fix make namespacecheck warnings.Tetsuo Handa5-7/+9
Commit efe836ab "TOMOYO: Add built-in policy support." introduced tomoyo_load_builtin_policy() but was by error called from nowhere. Commit b22b8b9f "TOMOYO: Rename meminfo to stat and show more statistics." introduced tomoyo_update_stat() but was by error not called from tomoyo_assign_domain(). Also, mark tomoyo_io_printf() and tomoyo_path_permission() static functions, as reported by "make namespacecheck". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-19TOMOYO: Allow specifying domain transition preference.Tetsuo Handa5-12/+137
I got an opinion that it is difficult to use exception policy's domain transition control directives because they need to match the pathname specified to "file execute" directives. For example, if "file execute /bin/\*\-ls\-cat" is given, corresponding domain transition control directive needs to be like "no_keep_domain /bin/\*\-ls\-cat from any". If we can specify like below, it will become more convenient. file execute /bin/ls keep exec.realpath="/bin/ls" exec.argv[0]="ls" file execute /bin/cat keep exec.realpath="/bin/cat" exec.argv[0]="cat" file execute /bin/\*\-ls\-cat child file execute /usr/sbin/httpd <apache> exec.realpath="/usr/sbin/httpd" exec.argv[0]="/usr/sbin/httpd" In above examples, "keep" works as if keep_domain is specified, "child" works as if "no_reset_domain" and "no_initialize_domain" and "no_keep_domain" are specified, "<apache>" causes domain transition to <apache> domain upon successful execve() operation. Moreover, we can also allow transition to different domains based on conditions like below example. <kernel> /usr/sbin/sshd file execute /bin/bash <kernel> /usr/sbin/sshd //batch-session exec.argc=2 exec.argv[1]="-c" file execute /bin/bash <kernel> /usr/sbin/sshd //root-session task.uid=0 file execute /bin/bash <kernel> /usr/sbin/sshd //nonroot-session task.uid!=0 Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-15TOMOYO: Bump version.Tetsuo Handa3-9/+9
Tell userland tools that this is TOMOYO 2.5. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-14TOMOYO: Avoid race when retrying "file execute" permission check.Tetsuo Handa1-34/+22
There was a race window that the pathname which is subjected to "file execute" permission check when retrying via supervisor's decision because the pathname was recalculated upon retry. Though, there is an inevitable race window even without supervisor, for we have to calculate the symbolic link's pathname from "struct linux_binprm"->filename rather than from "struct linux_binprm"->file because we cannot back calculate the symbolic link's pathname from the dereferenced pathname. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-14TOMOYO: Allow domain transition without execve().Tetsuo Handa4-28/+210
To be able to split permissions for Apache's CGI programs which are executed without execve(), add special domain transition which is performed by writing a TOMOYO's domainname to /sys/kernel/security/tomoyo/self_domain interface. This is an API for TOMOYO-aware userland applications. However, since I expect TOMOYO and other LSM modules to run in parallel, this patch does not use /proc/self/attr/ interface in order to avoid conflicts with other LSM modules when it became possible to run multiple LSM modules in parallel. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-14TOMOYO: Allow controlling generation of access granted logs for per an entry ↵Tetsuo Handa5-1/+38
basis. Add per-entry flag which controls generation of grant logs because Xen and KVM issues ioctl requests so frequently. For example, file ioctl /dev/null 0x5401 grant_log=no will suppress /sys/kernel/security/tomoyo/audit even if preference says grant_log=yes . Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-14TOMOYO: Add socket operation restriction support.Tetsuo Handa10-17/+1215
This patch adds support for permission checks for PF_INET/PF_INET6/PF_UNIX socket's bind()/listen()/connect()/send() operations. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-14TOMOYO: Add environment variable name restriction support.Tetsuo Handa7-10/+266
This patch adds support for checking environment variable's names. Although TOMOYO already provides ability to check argv[]/envp[] passed to execve() requests, file execute /bin/sh exec.envp["LD_LIBRARY_PATH"]="bar" will reject execution of /bin/sh if environment variable LD_LIBRARY_PATH is not defined. To grant execution of /bin/sh if LD_LIBRARY_PATH is not defined, administrators have to specify like file execute /bin/sh exec.envp["LD_LIBRARY_PATH"]="/system/lib" file execute /bin/sh exec.envp["LD_LIBRARY_PATH"]=NULL . Since there are many environment variables whereas conditional checks are applied as "&&", it is difficult to cover all combinations. Therefore, this patch supports conditional checks that are applied as "||", by specifying like file execute /bin/sh misc env LD_LIBRARY_PATH exec.envp["LD_LIBRARY_PATH"]="/system/lib" which means "grant execution of /bin/sh if environment variable is not defined or is defined and its value is /system/lib". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-09TOMOYO: Fix incorrect enforce mode.Tetsuo Handa1-1/+2
In tomoyo_get_mode() since 2.6.36, CONFIG::file::execute was by error used in place of CONFIG::file if CONFIG::file::execute was set to other than default. As a result, enforcing mode was not applied in a way documentation says. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-08-17tomoyo: remove tomoyo_gc_thread()->daemonize()Oleg Nesterov1-1/+1
daemonize() is only needed when a user-space task does kernel_thread(). tomoyo_gc_thread() is kthread_create()'ed and thus it doesn't need the soon-to-be-deprecated daemonize(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: James Morris <jmorris@namei.org>
2011-08-08TOMOYO: Fix incomplete read of /sys/kernel/security/tomoyo/profileTetsuo Handa1-1/+4
Commit bd03a3e4 "TOMOYO: Add policy namespace support." forgot to set EOF flag and forgot to print namespace at PREFERENCE line. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-14TOMOYO: Update kernel-doc.Tetsuo Handa13-62/+269
Update comments for scripts/kernel-doc and fix some of errors reported by scripts/checkpatch.pl . Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Enable conditional ACL.Tetsuo Handa5-33/+80
Enable conditional ACL by passing object's pointers. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Allow using argv[]/envp[] of execve() as conditions.Tetsuo Handa6-10/+589
This patch adds support for permission checks using argv[]/envp[] of execve() request. Hooks are in the last patch of this pathset. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Allow using executable's realpath and symlink's target as conditions.Tetsuo Handa5-4/+228
This patch adds support for permission checks using executable file's realpath upon execve() and symlink's target upon symlink(). Hooks are in the last patch of this pathset. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Allow using owner/group etc. of file objects as conditions.Tetsuo Handa4-0/+457
This patch adds support for permission checks using file object's DAC attributes (e.g. owner/group) when checking file's pathnames. Hooks for passing file object's pointers are in the last patch of this pathset. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Allow using UID/GID etc. of current thread as conditions.Tetsuo Handa8-37/+651
This patch adds support for permission checks using current thread's UID/GID etc. in addition to pathnames. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-08TOMOYO: Remove /sys/kernel/security/tomoyo/.domain_status interface.Tetsuo Handa3-76/+0
/sys/kernel/security/tomoyo/.domain_status can be easily emulated using /sys/kernel/security/tomoyo/domain_policy . We can remove this interface by updating /usr/sbin/tomoyo-setprofile utility. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-01TOMOYO: Fix wrong domainname in tomoyo_init_log().Tetsuo Handa1-1/+1
Commit eadd99cc "TOMOYO: Add auditing interface." by error replaced "struct tomoyo_request_info"->domain with tomoyo_domain(). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-30TOMOYO: Cleanup header file.Tetsuo Handa1-117/+96
Sort by alphabetic order. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-30TOMOYO: Fix build error with CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER=y .Tetsuo Handa1-0/+2
I forgot to add #ifndef in commit 0e4ae0e0 "TOMOYO: Make several options configurable.", resulting security/built-in.o: In function `tomoyo_bprm_set_creds': tomoyo.c:(.text+0x4698e): undefined reference to `tomoyo_load_policy' error. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-30Merge branch 'linus' into nextJames Morris1-1/+1
2011-06-29TOMOYO: Make several options configurable.Tetsuo Handa3-23/+117
To be able to start using enforcing mode from the early stage of boot sequence, this patch adds support for activating access control without calling external policy loader program. This will be useful for systems where operations which can lead to the hijacking of the boot sequence are needed before loading the policy. For example, you can activate immediately after loading the fixed part of policy which will allow only operations needed for mounting a partition which contains the variant part of policy and verifying (e.g. running GPG check) and loading the variant part of policy. Since you can start using enforcing mode from the beginning, you can reduce the possibility of hijacking the boot sequence. This patch makes several variables configurable on build time. This patch also adds TOMOYO_loader= and TOMOYO_trigger= kernel command line option to boot the same kernel in two different init systems (BSD-style init and systemd). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add built-in policy support.Tetsuo Handa4-10/+108
To be able to start using enforcing mode from the early stage of boot sequence, this patch adds support for built-in policy configuration (and next patch adds support for activating access control without calling external policy loader program). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Rename meminfo to stat and show more statistics.Tetsuo Handa6-143/+206
Show statistics such as last policy update time and last policy violation time in addition to memory usage. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 4.Tetsuo Handa6-121/+177
Gather string constants to one file in order to make the object size smaller. Use unsigned type where appropriate. read()/write() returns ssize_t. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Fix lockdep warning.Tetsuo Handa3-51/+276
Currently TOMOYO holds SRCU lock upon open() and releases it upon close() because list elements stored in the "struct tomoyo_io_buffer" instances are accessed until close() is called. However, such SRCU usage causes lockdep to complain about leaving the kernel with SRCU lock held. This patch solves the warning by holding/releasing SRCU upon each read()/write(). This patch is doing something similar to calling kfree() without calling synchronize_srcu(), by selectively deferring kfree() by keeping track of the "struct tomoyo_io_buffer" instances. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Change pathname for non-rename()able filesystems.Tetsuo Handa2-54/+180
TOMOYO wants to use /proc/self/ rather than /proc/$PID/ if $PID matches current thread's process ID in order to prevent current thread from accessing other process's information unless needed. But since procfs can be mounted on various locations (e.g. /proc/ /proc2/ /p/ /tmp/foo/100/p/ ), TOMOYO cannot tell that whether the numeric part in the string returned by __d_path() represents process ID or not. Therefore, to be able to convert from $PID to self no matter where procfs is mounted, this patch changes pathname representations for filesystems which do not support rename() operation (e.g. proc, sysfs, securityfs). Examples: /proc/self/mounts => proc:/self/mounts /sys/kernel/security/ => sys:/kernel/security/ /dev/pts/0 => devpts:/0 Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add policy namespace support.Tetsuo Handa8-299/+669
Mauras Olivier reported that it is difficult to use TOMOYO in LXC environments, for TOMOYO cannot distinguish between environments outside the container and environments inside the container since LXC environments are created using pivot_root(). To address this problem, this patch introduces policy namespace. Each policy namespace has its own set of domain policy, exception policy and profiles, which are all independent of other namespaces. This independency allows users to develop policy without worrying interference among namespaces. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add ACL group support.Tetsuo Handa5-11/+88
ACL group allows administrator to globally grant not only "file read" permission but also other permissions. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add auditing interface.Tetsuo Handa9-235/+557
Add /sys/kernel/security/tomoyo/audit interface. This interface generates audit logs in the form of domain policy so that /usr/sbin/tomoyo-auditd can reuse audit logs for appending to /sys/kernel/security/tomoyo/domain_policy interface. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Simplify profile structure.Tetsuo Handa3-168/+83
Remove global preference from profile structure in order to make code simpler. Due to this structure change, printk() warnings upon policy violation are temporarily disabled. They will be replaced by /sys/kernel/security/tomoyo/audit by next patch. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Rename directives.Tetsuo Handa4-59/+113
Convert "allow_..." style directives to "file ..." style directives. By converting to the latter style, we can pack policy like "file read/write/execute /path/to/file". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Use struct for passing ACL line.Tetsuo Handa8-371/+347
Use structure for passing ACL line, in preparation for supporting policy namespace and conditional parameters. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 3.Tetsuo Handa9-153/+410
Use common structure for ACL with "struct list_head" + "atomic_t". Use array/struct where possible. Remove is_group from "struct tomoyo_name_union"/"struct tomoyo_number_union". Pass "struct file"->private_data rather than "struct file". Update some of comments. Bring tomoyo_same_acl_head() from common.h to domain.c . Bring tomoyo_invalid()/tomoyo_valid() from common.h to util.c . Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 2.Tetsuo Handa5-359/+204
Update (or temporarily remove) comments. Remove or replace some of #define lines. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 1.Tetsuo Handa8-535/+71
In order to synchronize with TOMOYO 1.8's syntax, (1) Remove special handling for allow_read/write permission. (2) Replace deny_rewrite/allow_rewrite permission with allow_append permission. (3) Remove file_pattern keyword. (4) Remove allow_read permission from exception policy. (5) Allow creating domains in enforcing mode without calling supervisor. (6) Add permission check for opening directory for reading. (7) Add permission check for stat() operation. (8) Make "cat < /sys/kernel/security/tomoyo/self_domain" behave as if "cat /sys/kernel/security/tomoyo/self_domain". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-14TOMOYO: Fix oops in tomoyo_mount_acl().Tetsuo Handa1-1/+1
In tomoyo_mount_acl() since 2.6.36, kern_path() was called without checking dev_name != NULL. As a result, an unprivileged user can trigger oops by issuing mount(NULL, "/", "ext3", 0, NULL) request. Fix this by checking dev_name != NULL before calling kern_path(dev_name). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: stable@kernel.org Signed-off-by: James Morris <jmorris@namei.org>
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