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userns: Convert binder ipc to use kuids

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Cc: Arve Hjønnevåg <arve@android.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-05-25 18:34:53 -06:00
parent d2b31ca644
commit 4a2ebb93bf
2 changed files with 7 additions and 10 deletions
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14
drivers/staging/android/binder.c
View file

@ -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 @@ retry:
}
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;
}

3
init/Kconfig
View file

@ -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