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| author | David Quigley <dpquigl@tycho.nsa.gov> | 2006-06-23 11:04:01 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-23 16:42:54 +0200 |
| commit | 35601547baf92d984b6e59cf3583649da04baea5 (patch) | |
| tree | a392501e6e004ed33789dbf3f7a9fe43295439e1 | |
| parent | [PATCH] SELinux: add security hook call to mediate attach_task (kernel/cpuset.c) (diff) | |
| download | linux-35601547baf92d984b6e59cf3583649da04baea5.tar.xz linux-35601547baf92d984b6e59cf3583649da04baea5.zip | |
[PATCH] SELinux: add task_movememory hook
This patch adds new security hook, task_movememory, to be called when memory
owened by a task is to be moved (e.g. when migrating pages to a this hook is
identical to the setscheduler implementation, but a separate hook introduced
to allow this check to be specialized in the future if necessary.
Since the last posting, the hook has been renamed following feedback from
Christoph Lameter.
Signed-off-by: David Quigley <dpquigl@tycho.nsa.gov>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@muc.de>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/security.h | 15 | ||||
| -rw-r--r-- | security/dummy.c | 6 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 6 |
3 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h index 65b32a0c6207..d2c17bd91a29 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -601,6 +601,10 @@ struct swap_info_struct; * @p. * @p contains the task_struct for process. * Return 0 if permission is granted. + * @task_movememory + * Check permission before moving memory owned by process @p. + * @p contains the task_struct for process. + * Return 0 if permission is granted. * @task_kill: * Check permission before sending signal @sig to @p. @info can be NULL, * the constant 1, or a pointer to a siginfo structure. If @info is 1 or @@ -1220,6 +1224,7 @@ struct security_operations { int (*task_setscheduler) (struct task_struct * p, int policy, struct sched_param * lp); int (*task_getscheduler) (struct task_struct * p); + int (*task_movememory) (struct task_struct * p); int (*task_kill) (struct task_struct * p, struct siginfo * info, int sig); int (*task_wait) (struct task_struct * p); @@ -1865,6 +1870,11 @@ static inline int security_task_getscheduler (struct task_struct *p) return security_ops->task_getscheduler (p); } +static inline int security_task_movememory (struct task_struct *p) +{ + return security_ops->task_movememory (p); +} + static inline int security_task_kill (struct task_struct *p, struct siginfo *info, int sig) { @@ -2512,6 +2522,11 @@ static inline int security_task_getscheduler (struct task_struct *p) return 0; } +static inline int security_task_movememory (struct task_struct *p) +{ + return 0; +} + static inline int security_task_kill (struct task_struct *p, struct siginfo *info, int sig) { diff --git a/security/dummy.c b/security/dummy.c index 879a98523b1b..c3c5493581e2 100644 --- a/security/dummy.c +++ b/security/dummy.c @@ -537,6 +537,11 @@ static int dummy_task_getscheduler (struct task_struct *p) return 0; } +static int dummy_task_movememory (struct task_struct *p) +{ + return 0; +} + static int dummy_task_wait (struct task_struct *p) { return 0; @@ -981,6 +986,7 @@ void security_fixup_ops (struct security_operations *ops) set_to_dummy_if_null(ops, task_setrlimit); set_to_dummy_if_null(ops, task_setscheduler); set_to_dummy_if_null(ops, task_getscheduler); + set_to_dummy_if_null(ops, task_movememory); set_to_dummy_if_null(ops, task_wait); set_to_dummy_if_null(ops, task_kill); set_to_dummy_if_null(ops, task_prctl); diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 9dcf298921d4..79c16e31c884 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2679,6 +2679,11 @@ static int selinux_task_getscheduler(struct task_struct *p) return task_has_perm(current, p, PROCESS__GETSCHED); } +static int selinux_task_movememory(struct task_struct *p) +{ + return task_has_perm(current, p, PROCESS__SETSCHED); +} + static int selinux_task_kill(struct task_struct *p, struct siginfo *info, int sig) { u32 perm; @@ -4392,6 +4397,7 @@ static struct security_operations selinux_ops = { .task_setrlimit = selinux_task_setrlimit, .task_setscheduler = selinux_task_setscheduler, .task_getscheduler = selinux_task_getscheduler, + .task_movememory = selinux_task_movememory, .task_kill = selinux_task_kill, .task_wait = selinux_task_wait, .task_prctl = selinux_task_prctl, |