From: Kenneth Lee <liguozhu@hisilicon.com>
To: <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>, <liguozhu@hisilicon.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>
Subject: [PATCH] ib umem: bug: put pid back before return from error path
Date: Thu, 22 Dec 2016 15:11:32 +0800 [thread overview]
Message-ID: <1482390692-147946-1-git-send-email-liguozhu@hisilicon.com> (raw)
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);
}
--
1.9.1
next reply other threads:[~2016-12-22 6:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-22 7:11 Kenneth Lee [this message]
2016-12-22 8:00 ` [PATCH] ib umem: bug: put pid back before return from error path Mark Bloch
2016-12-29 2:28 ` Kenneth Lee
2016-12-22 11:03 ` Haggai Eran
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