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authorDavid Quigley <dpquigl@tycho.nsa.gov>2006-06-30 01:55:49 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-30 11:25:37 -0700
commita1836a42daf5ddfe9a891973734bd9a7d62eb504 (patch)
treee8819aec40aff3fa0eecd2ef9d92df8213bce58b /security
parent7a01955f99b65622a00ba5c8b39202ddc6fa65f8 (diff)
[PATCH] SELinux: Add security hook definition for getioprio and insert hooks
Add a new security hook definition for the sys_ioprio_get operation. At present, the SELinux hook function implementation for this hook is identical to the getscheduler implementation but a separate hook is introduced to allow this check to be specialized in the future if necessary. This patch also creates a helper function get_task_ioprio which handles the access check in addition to retrieving the ioprio value for the task. 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: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security')
-rw-r--r--security/dummy.c6
-rw-r--r--security/selinux/hooks.c6
2 files changed, 12 insertions, 0 deletions
diff --git a/security/dummy.c b/security/dummy.c
index de53f6eb0c08..d417936562db 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -524,6 +524,11 @@ static int dummy_task_setioprio (struct task_struct *p, int ioprio)
return 0;
}
+static int dummy_task_getioprio (struct task_struct *p)
+{
+ return 0;
+}
+
static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
{
return 0;
@@ -988,6 +993,7 @@ void security_fixup_ops (struct security_operations *ops)
set_to_dummy_if_null(ops, task_setgroups);
set_to_dummy_if_null(ops, task_setnice);
set_to_dummy_if_null(ops, task_setioprio);
+ set_to_dummy_if_null(ops, task_getioprio);
set_to_dummy_if_null(ops, task_setrlimit);
set_to_dummy_if_null(ops, task_setscheduler);
set_to_dummy_if_null(ops, task_getscheduler);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index a5189a347354..51bec4c88f19 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2671,6 +2671,11 @@ static int selinux_task_setioprio(struct task_struct *p, int ioprio)
return task_has_perm(current, p, PROCESS__SETSCHED);
}
+static int selinux_task_getioprio(struct task_struct *p)
+{
+ return task_has_perm(current, p, PROCESS__GETSCHED);
+}
+
static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim)
{
struct rlimit *old_rlim = current->signal->rlim + resource;
@@ -4449,6 +4454,7 @@ static struct security_operations selinux_ops = {
.task_setgroups = selinux_task_setgroups,
.task_setnice = selinux_task_setnice,
.task_setioprio = selinux_task_setioprio,
+ .task_getioprio = selinux_task_getioprio,
.task_setrlimit = selinux_task_setrlimit,
.task_setscheduler = selinux_task_setscheduler,
.task_getscheduler = selinux_task_getscheduler,

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