prlimit,security,selinux: add a security hook for prlimit

[linux.git] / security / selinux / hooks.c

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 0c2ac318aa7fb8bc11830e7c8c10fe6730f49c46..870d24ecc2decf043e08dd8060aae0dbe0f16f91 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3920,6 +3920,19 @@ static int selinux_task_getioprio(struct task_struct *p)
                            PROCESS__GETSCHED, NULL);
 }
 
+int selinux_task_prlimit(const struct cred *cred, const struct cred *tcred,
+                        unsigned int flags)
+{
+       u32 av = 0;
+
+       if (flags & LSM_PRLIMIT_WRITE)
+               av |= PROCESS__SETRLIMIT;
+       if (flags & LSM_PRLIMIT_READ)
+               av |= PROCESS__GETRLIMIT;
+       return avc_has_perm(cred_sid(cred), cred_sid(tcred),
+                           SECCLASS_PROCESS, av, NULL);
+}
+
 static int selinux_task_setrlimit(struct task_struct *p, unsigned int resource,
                struct rlimit *new_rlim)
 {
@@ -6206,6 +6219,7 @@ static struct security_hook_list selinux_hooks[] = {
        LSM_HOOK_INIT(task_setnice, selinux_task_setnice),
        LSM_HOOK_INIT(task_setioprio, selinux_task_setioprio),
        LSM_HOOK_INIT(task_getioprio, selinux_task_getioprio),
+       LSM_HOOK_INIT(task_prlimit, selinux_task_prlimit),
        LSM_HOOK_INIT(task_setrlimit, selinux_task_setrlimit),
        LSM_HOOK_INIT(task_setscheduler, selinux_task_setscheduler),
        LSM_HOOK_INIT(task_getscheduler, selinux_task_getscheduler),