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-rw-r--r--fs/dlm/lock.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 0dbe273566c0..54705d367076 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -3989,6 +3989,14 @@ static int validate_message(struct dlm_lkb *lkb, struct dlm_message *ms)
int from = ms->m_header.h_nodeid;
int error = 0;
+ /* currently mixing of user/kernel locks are not supported */
+ if (ms->m_flags & DLM_IFL_USER && ~lkb->lkb_flags & DLM_IFL_USER) {
+ log_error(lkb->lkb_resource->res_ls,
+ "got user dlm message for a kernel lock");
+ error = -EINVAL;
+ goto out;
+ }
+
switch (ms->m_type) {
case DLM_MSG_CONVERT:
case DLM_MSG_UNLOCK:
@@ -4017,6 +4025,7 @@ static int validate_message(struct dlm_lkb *lkb, struct dlm_message *ms)
error = -EINVAL;
}
+out:
if (error)
log_error(lkb->lkb_resource->res_ls,
"ignore invalid message %d from %d %x %x %x %d",