diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-02-07 16:48:16 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-09-06 19:37:10 -0700 |
| commit | 9582d90196aa879e6acf866f02a1adead08707b5 (patch) | |
| tree | aca09890296a7f51c6da530841388d392cb01d90 /drivers | |
| parent | 7dc05881b64792e0ea41293e9595cc962a716225 (diff) | |
| download | linux-stable-9582d90196aa879e6acf866f02a1adead08707b5.tar.gz linux-stable-9582d90196aa879e6acf866f02a1adead08707b5.tar.bz2 linux-stable-9582d90196aa879e6acf866f02a1adead08707b5.zip | |
userns: Convert process event connector to handle kuids and kgids
- Only allow asking for events from the initial user and pid namespace,
where we generate the events in.
- Convert kuids and kgids into the initial user namespace to report
them via the process event connector.
Cc: David Miller <davem@davemloft.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/connector/cn_proc.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c index 3e92b7d3fcd2..fce2000eec31 100644 --- a/drivers/connector/cn_proc.c +++ b/drivers/connector/cn_proc.c @@ -30,6 +30,7 @@ #include <linux/gfp.h> #include <linux/ptrace.h> #include <linux/atomic.h> +#include <linux/pid_namespace.h> #include <asm/unaligned.h> @@ -127,11 +128,11 @@ void proc_id_connector(struct task_struct *task, int which_id) rcu_read_lock(); cred = __task_cred(task); if (which_id == PROC_EVENT_UID) { - ev->event_data.id.r.ruid = cred->uid; - ev->event_data.id.e.euid = cred->euid; + ev->event_data.id.r.ruid = from_kuid_munged(&init_user_ns, cred->uid); + ev->event_data.id.e.euid = from_kuid_munged(&init_user_ns, cred->euid); } else if (which_id == PROC_EVENT_GID) { - ev->event_data.id.r.rgid = cred->gid; - ev->event_data.id.e.egid = cred->egid; + ev->event_data.id.r.rgid = from_kgid_munged(&init_user_ns, cred->gid); + ev->event_data.id.e.egid = from_kgid_munged(&init_user_ns, cred->egid); } else { rcu_read_unlock(); return; @@ -303,6 +304,15 @@ static void cn_proc_mcast_ctl(struct cn_msg *msg, if (msg->len != sizeof(*mc_op)) return; + /* + * Events are reported with respect to the initial pid + * and user namespaces so ignore requestors from + * other namespaces. + */ + if ((current_user_ns() != &init_user_ns) || + (task_active_pid_ns(current) != &init_pid_ns)) + return; + mc_op = (enum proc_cn_mcast_op *)msg->data; switch (*mc_op) { case PROC_CN_MCAST_LISTEN: |