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IB/hfi1: Use kzalloc() for mmu_rb_handler allocation

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[ Upstream commit ca5f72568e ]

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: 06e0ffa693 ("IB/hfi1: Re-factor MMU notification code")
Link: https://lore.kernel.org/r/1617026056-50483-9-git-send-email-dennis.dalessandro@cornelisnetworks.com
Reviewed-by: Adam Goldman <adam.goldman@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mike Marciniszyn 2021-03-29 09:54:14 -04:00 • committed by Greg Kroah-Hartman
commit 8fac4bd367
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/hfi1/mmu_rb.c
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@ -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;