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authorCasey Schaufler <casey@schaufler-ca.com>2018-11-12 20:30:56 +0300
committerKees Cook <keescook@chromium.org>2019-01-09 00:18:44 +0300
commitbbd3662a834813730912a58efb44dd6df6d952e6 (patch)
treef4c0252814e717185845bde03fe88d341d5967b5 /security/apparmor/lsm.c
parent43fc460907dc56a3450654efc6ba1dfbcd4594eb (diff)
downloadlinux-bbd3662a834813730912a58efb44dd6df6d952e6.tar.xz
Infrastructure management of the cred security blob
Move management of the cred security blob out of the security modules and into the security infrastructre. Instead of allocating and freeing space the security modules tell the infrastructure how much space they require. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Kees Cook <keescook@chromium.org> [kees: adjusted for ordered init series] Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'security/apparmor/lsm.c')
-rw-r--r--security/apparmor/lsm.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index 8c2cb4b1a6c3..d5e4a384f205 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -1151,6 +1151,13 @@ static int apparmor_inet_conn_request(struct sock *sk, struct sk_buff *skb,
}
#endif
+/*
+ * The cred blob is a pointer to, not an instance of, an aa_task_ctx.
+ */
+struct lsm_blob_sizes apparmor_blob_sizes __lsm_ro_after_init = {
+ .lbs_cred = sizeof(struct aa_task_ctx *),
+};
+
static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check),
LSM_HOOK_INIT(ptrace_traceme, apparmor_ptrace_traceme),
@@ -1485,6 +1492,7 @@ static int __init set_init_ctx(void)
if (!ctx)
return -ENOMEM;
+ lsm_early_cred(cred);
set_cred_label(cred, aa_get_label(ns_unconfined(root_ns)));
task_ctx(current) = ctx;
@@ -1725,5 +1733,6 @@ DEFINE_LSM(apparmor) = {
.name = "apparmor",
.flags = LSM_FLAG_LEGACY_MAJOR | LSM_FLAG_EXCLUSIVE,
.enabled = &apparmor_enabled,
+ .blobs = &apparmor_blob_sizes,
.init = apparmor_init,
};