[31/46] dm/connector: Only process connector packages from privileged processes

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Philipp Reisner <philipp.reisner@xxxxxxxxxx>

(cherry picked from commit 93136335f9ad7a98b92eacda1b43dccbf063cd07)

Signed-off-by: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/md/dm-log-userspace-transfer.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/md/dm-log-userspace-transfer.c
+++ b/drivers/md/dm-log-userspace-transfer.c
@@ -133,6 +133,9 @@ static void cn_ulog_callback(struct cn_m
 {
 	struct dm_ulog_request *tfr = (struct dm_ulog_request *)(msg + 1);
 
+	if (!cap_raised(nsp->eff_cap, CAP_SYS_ADMIN))
+		return;
+
 	spin_lock(&receiving_list_lock);
 	if (msg->len == 0)
 		fill_pkg(msg, NULL);


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