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Commit 4a2ebb93 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

userns: Convert binder ipc to use kuids 



Cc: Arve Hjønnevåg <arve@android.com>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: default avatarSerge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
parent d2b31ca6

drivers/staging/android/binder.c

+7 −7
Original line number Diff line number Diff line
@@ -47,7 +47,7 @@ static HLIST_HEAD(binder_dead_nodes); 
static struct dentry *binder_debugfs_dir_entry_root;

static struct dentry *binder_debugfs_dir_entry_proc;

static struct binder_node *binder_context_mgr_node;

static uid_t binder_context_mgr_uid = -1;

static kuid_t binder_context_mgr_uid = INVALID_UID;

static int binder_last_id;

static struct workqueue_struct *binder_deferred_workqueue;
@@ -356,7 +356,7 @@ struct binder_transaction { 
	unsigned int	flags;

	long	priority;

	long	saved_priority;

	uid_t	sender_euid;

	kuid_t	sender_euid;

};



static void
@@ -2427,7 +2427,7 @@ static int binder_thread_read(struct binder_proc *proc, 
		}

		tr.code = t->code;

		tr.flags = t->flags;

		tr.sender_euid = t->sender_euid;

		tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid);



		if (t->from) {

			struct task_struct *sender = t->from->proc->tsk;
@@ -2705,12 +2705,12 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 
			ret = -EBUSY;

			goto err;

		}

		if (binder_context_mgr_uid != -1) {

			if (binder_context_mgr_uid != current->cred->euid) {

		if (uid_valid(binder_context_mgr_uid)) {

			if (!uid_eq(binder_context_mgr_uid, current->cred->euid)) {

				pr_err("binder: BINDER_SET_"

				       "CONTEXT_MGR bad uid %d != %d\n",

				       current->cred->euid,

				       binder_context_mgr_uid);

				       from_kuid(&init_user_ns, current->cred->euid),

				       from_kuid(&init_user_ns, binder_context_mgr_uid));

				ret = -EPERM;

				goto err;

			}

init/Kconfig

+0 −3
Original line number Diff line number Diff line
@@ -952,9 +952,6 @@ config UIDGID_CONVERTED 
	depends on UFS_FS = n

	depends on XFS_FS = n



	# The rare drivers that won't build

	depends on ANDROID_BINDER_IPC = n



config UIDGID_STRICT_TYPE_CHECKS

	bool "Require conversions between uid/gids and their internal representation"

	depends on UIDGID_CONVERTED