dlm: check for undefined release_option values
Checking on all undefined release_option values to return -EINVAL in
case a user is providing them to dlm_release_lockspace().
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 8eadbf0..ddaa765 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -797,6 +797,9 @@ int dlm_release_lockspace(void *lockspace, unsigned int release_option)
struct dlm_ls *ls;
int error;
+ if (release_option > __DLM_RELEASE_MAX)
+ return -EINVAL;
+
ls = dlm_find_lockspace_local(lockspace);
if (!ls)
return -EINVAL;
diff --git a/include/linux/dlm.h b/include/linux/dlm.h
index 34015a0..7e7b45b 100644
--- a/include/linux/dlm.h
+++ b/include/linux/dlm.h
@@ -113,6 +113,7 @@ int dlm_new_lockspace(const char *name, const char *cluster,
#define DLM_RELEASE_NORMAL 2
#define DLM_RELEASE_NO_EVENT 3
#define DLM_RELEASE_RECOVER 4
+#define __DLM_RELEASE_MAX DLM_RELEASE_RECOVER
/*
* dlm_release_lockspace
