From: Haggai Eran <haggaie@mellanox.com>
To: Kenneth Lee <liguozhu@hisilicon.com>, <dledford@redhat.com>,
<sean.hefty@intel.com>, <hal.rosenstock@gmail.com>
Cc: <robin.murphy@arm.com>, <jroedel@suse.de>, <egtvedt@samfundet.no>,
<vgupta@synopsys.com>, <dave.hansen@linux.intel.com>,
<lstoakes@gmail.com>, <krzk@kernel.org>,
<sebott@linux.vnet.ibm.com>, <markb@mellanox.com>,
<linux-rdma@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Ilya Lesokhin <ilyal@mellanox.com>,
Kovalyov Artemy <artemyko@mellanox.com>
Subject: Re: [PATCH] ib umem: bug: put pid back before return from error path
Date: Thu, 22 Dec 2016 13:03:15 +0200 [thread overview]
Message-ID: <fdb6cae7-a914-fb10-1eab-6f77f2a32cba@mellanox.com> (raw)
In-Reply-To: <1482390692-147946-1-git-send-email-liguozhu@hisilicon.com>
On 12/22/2016 9:11 AM, Kenneth Lee wrote:
> I catched this bug when reading the code. I'm sorry I have no hardware to test
> it. But it is abviously a bug.
>
> Signed-off-by: Kenneth Lee <liguozhu@hisilicon.com>
> ---
> drivers/infiniband/core/umem.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
> index 1e62a5f..4609b92 100644
> --- a/drivers/infiniband/core/umem.c
> +++ b/drivers/infiniband/core/umem.c
> @@ -134,6 +134,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
> IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND));
>
> if (access & IB_ACCESS_ON_DEMAND) {
> + put_pid(umem->pid);
> ret = ib_umem_odp_get(context, umem);
> if (ret) {
> kfree(umem);
> @@ -149,6 +150,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
>
> page_list = (struct page **) __get_free_page(GFP_KERNEL);
> if (!page_list) {
> + put_pid(umem->pid);
> kfree(umem);
> return ERR_PTR(-ENOMEM);
> }
>
Looks good to me. Thanks!
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
prev parent reply other threads:[~2016-12-22 19:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-22 7:11 [PATCH] ib umem: bug: put pid back before return from error path Kenneth Lee
2016-12-22 8:00 ` Mark Bloch
2016-12-29 2:28 ` Kenneth Lee
2016-12-22 11:03 ` Haggai Eran [this message]
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