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-rw-r--r--ext/session/mod_mm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/ext/session/mod_mm.c b/ext/session/mod_mm.c
index 41b82ecf62..26f5789350 100644
--- a/ext/session/mod_mm.c
+++ b/ext/session/mod_mm.c
@@ -216,6 +216,10 @@ PS_OPEN_FUNC(mm)
{
ps_mm_debug("open: ps_mm_instance=%x\n", ps_mm_instance);
+ if(!ps_mm_instance) {
+ return FAILURE;
+ }
+
PS_SET_MOD_DATA(ps_mm_instance);
return SUCCESS;