master - dmeventd: no registering of 0 event mask

[Zdenek Kabelac]

Gitweb:        http://git.fedorahosted.org/git/?p=lvm2.git;a=commitdiff;h=9488cbdd0bd3a410e...
Commit:        9488cbdd0bd3a410ec1e77454c6a18bdfe8612f5
Parent:        fa9e41d2e373e7e8017b158f60eb3e77a582f532
Author:        Zdenek Kabelac 
AuthorDate:    Thu Oct 22 11:10:57 2015 +0200
Committer:     Zdenek Kabelac 
CommitterDate: Thu Oct 22 22:33:19 2015 +0200

dmeventd: no registering of 0 event mask

Whenever user tries to register 0 mask report this as EINVAL.
---
 daemons/dmeventd/dmeventd.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/daemons/dmeventd/dmeventd.c b/daemons/dmeventd/dmeventd.c
index 80e6b14..f2c417c 100644
--- a/daemons/dmeventd/dmeventd.c
+++ b/daemons/dmeventd/dmeventd.c
@@ -1472,6 +1472,8 @@ static int _handle_request(struct dm_event_daemon_message *msg,
 {
    switch (msg->cmd) {
    case DM_EVENT_CMD_REGISTER_FOR_EVENT:
+		if (!message_data->events_field)
+			return -EINVAL;
    	return _register_for_event(message_data);
    case DM_EVENT_CMD_UNREGISTER_FOR_EVENT:
    	return _unregister_for_event(message_data);