From: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxxxxxxxxxxxxx>
The code currently assumes that the mmu_notifier struct
embedded in mmu_rb_handler only contains two fields.
There are now extra fields:
struct mmu_notifier {
struct hlist_node hlist;
const struct mmu_notifier_ops *ops;
struct mm_struct *mm;
struct rcu_head rcu;
unsigned int users;
};
Given that there in no init for the mmu_notifier, a kzalloc() should
be used to insure that any newly added fields are given a predictable
initial value of zero.
Fixes: 06e0ffa69312 ("IB/hfi1: Re-factor MMU notification code")
Reviewed-by: Adam Goldman <adam.goldman@xxxxxxxxx>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/hfi1/mmu_rb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/hfi1/mmu_rb.c b/drivers/infiniband/hw/hfi1/mmu_rb.c
index 375a881..dccb4c1 100644
--- a/drivers/infiniband/hw/hfi1/mmu_rb.c
+++ b/drivers/infiniband/hw/hfi1/mmu_rb.c
@@ -89,7 +89,7 @@ int hfi1_mmu_rb_register(void *ops_arg,
struct mmu_rb_handler *h;
int ret;
- h = kmalloc(sizeof(*h), GFP_KERNEL);
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
if (!h)
return -ENOMEM;
--
1.8.3.1
