* [PATCH rdma-next] RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked
@ 2019-07-04 13:00 Leon Romanovsky
2019-07-08 20:01 ` Jason Gunthorpe
0 siblings, 1 reply; 3+ messages in thread
From: Leon Romanovsky @ 2019-07-04 13:00 UTC (permalink / raw)
To: Doug Ledford, Jason Gunthorpe
Cc: Parav Pandit, RDMA mailing list, Leon Romanovsky
From: Parav Pandit <parav@mellanox.com>
While compiled with CONFIG_DEBUG_MUTEXES, the kernel ensures that mutex
is not held during destroy.
Hence add mutex_destroy() for mutexes used in RDMA modules.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
drivers/infiniband/core/cache.c | 1 +
drivers/infiniband/core/cma_configfs.c | 1 +
drivers/infiniband/core/device.c | 3 +++
drivers/infiniband/core/user_mad.c | 2 +-
drivers/infiniband/core/uverbs_main.c | 2 ++
drivers/infiniband/core/verbs.c | 1 +
6 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index 18e476b3ced0..00fb3eacda19 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -810,6 +810,7 @@ static void release_gid_table(struct ib_device *device,
if (leak)
return;
+ mutex_destroy(&table->lock);
kfree(table->data_vec);
kfree(table);
}
diff --git a/drivers/infiniband/core/cma_configfs.c b/drivers/infiniband/core/cma_configfs.c
index 3ec2c415bb70..0a7b5eba2fc0 100644
--- a/drivers/infiniband/core/cma_configfs.c
+++ b/drivers/infiniband/core/cma_configfs.c
@@ -350,4 +350,5 @@ int __init cma_configfs_init(void)
void __exit cma_configfs_exit(void)
{
configfs_unregister_subsystem(&cma_subsys);
+ mutex_destroy(&cma_subsys.su_mutex);
}
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 7f4affe8a10d..adf8d93bb42d 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -508,6 +508,9 @@ static void ib_device_release(struct device *device)
rcu_head);
}
+ mutex_destroy(&dev->unregistration_lock);
+ mutex_destroy(&dev->compat_devs_mutex);
+
xa_destroy(&dev->compat_devs);
xa_destroy(&dev->client_data);
kfree_rcu(dev, rcu_head);
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 9f8a48016b41..e0512aef033c 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -1038,7 +1038,7 @@ static int ib_umad_close(struct inode *inode, struct file *filp)
ib_unregister_mad_agent(file->agent[i]);
mutex_unlock(&file->port->file_mutex);
-
+ mutex_destroy(&file->mutex);
kfree(file);
return 0;
}
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 11c13c1381cf..4827aa3415ff 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -120,6 +120,8 @@ static void ib_uverbs_release_dev(struct device *device)
uverbs_destroy_api(dev->uapi);
cleanup_srcu_struct(&dev->disassociate_srcu);
+ mutex_destroy(&dev->lists_mutex);
+ mutex_destroy(&dev->xrcd_tree_mutex);
kfree(dev);
}
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 92349bf37589..f974b6854224 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2259,6 +2259,7 @@ int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata)
if (ret)
return ret;
}
+ mutex_destroy(&xrcd->tgt_qp_mutex);
return xrcd->device->ops.dealloc_xrcd(xrcd, udata);
}
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH rdma-next] RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked
2019-07-04 13:00 [PATCH rdma-next] RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked Leon Romanovsky
@ 2019-07-08 20:01 ` Jason Gunthorpe
2019-07-09 5:25 ` Parav Pandit
0 siblings, 1 reply; 3+ messages in thread
From: Jason Gunthorpe @ 2019-07-08 20:01 UTC (permalink / raw)
To: Leon Romanovsky
Cc: Doug Ledford, Parav Pandit, RDMA mailing list, Leon Romanovsky
On Thu, Jul 04, 2019 at 04:00:12PM +0300, Leon Romanovsky wrote:
> From: Parav Pandit <parav@mellanox.com>
>
> While compiled with CONFIG_DEBUG_MUTEXES, the kernel ensures that mutex
> is not held during destroy.
> Hence add mutex_destroy() for mutexes used in RDMA modules.
>
> Signed-off-by: Parav Pandit <parav@mellanox.com>
> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> drivers/infiniband/core/cache.c | 1 +
> drivers/infiniband/core/cma_configfs.c | 1 +
> drivers/infiniband/core/device.c | 3 +++
> drivers/infiniband/core/user_mad.c | 2 +-
> drivers/infiniband/core/uverbs_main.c | 2 ++
> drivers/infiniband/core/verbs.c | 1 +
> 6 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
> index 18e476b3ced0..00fb3eacda19 100644
> +++ b/drivers/infiniband/core/cache.c
> @@ -810,6 +810,7 @@ static void release_gid_table(struct ib_device *device,
> if (leak)
> return;
>
> + mutex_destroy(&table->lock);
> kfree(table->data_vec);
> kfree(table);
> }
> diff --git a/drivers/infiniband/core/cma_configfs.c b/drivers/infiniband/core/cma_configfs.c
> index 3ec2c415bb70..0a7b5eba2fc0 100644
> +++ b/drivers/infiniband/core/cma_configfs.c
> @@ -350,4 +350,5 @@ int __init cma_configfs_init(void)
> void __exit cma_configfs_exit(void)
> {
> configfs_unregister_subsystem(&cma_subsys);
> + mutex_destroy(&cma_subsys.su_mutex);
> }
There is a missing mutex_destroy in cma_configfs_init's error path.
> diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
> index 7f4affe8a10d..adf8d93bb42d 100644
> +++ b/drivers/infiniband/core/device.c
> @@ -508,6 +508,9 @@ static void ib_device_release(struct device *device)
> rcu_head);
> }
>
> + mutex_destroy(&dev->unregistration_lock);
> + mutex_destroy(&dev->compat_devs_mutex);
> +
> xa_destroy(&dev->compat_devs);
> xa_destroy(&dev->client_data);
> kfree_rcu(dev, rcu_head);
> diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
> index 9f8a48016b41..e0512aef033c 100644
> +++ b/drivers/infiniband/core/user_mad.c
> @@ -1038,7 +1038,7 @@ static int ib_umad_close(struct inode *inode, struct file *filp)
> ib_unregister_mad_agent(file->agent[i]);
>
> mutex_unlock(&file->port->file_mutex);
> -
> + mutex_destroy(&file->mutex);
> kfree(file);
The file->port->file_mutex is missing a destroy in ib_umad_dev_free
(bit tricky to do)
> return 0;
> }
> diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
> index 11c13c1381cf..4827aa3415ff 100644
> +++ b/drivers/infiniband/core/uverbs_main.c
> @@ -120,6 +120,8 @@ static void ib_uverbs_release_dev(struct device *device)
>
> uverbs_destroy_api(dev->uapi);
> cleanup_srcu_struct(&dev->disassociate_srcu);
> + mutex_destroy(&dev->lists_mutex);
> + mutex_destroy(&dev->xrcd_tree_mutex);
This file also has ucontext_lock and umap_lock that are missing
destroy
Jason
^ permalink raw reply [flat|nested] 3+ messages in thread* RE: [PATCH rdma-next] RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked
2019-07-08 20:01 ` Jason Gunthorpe
@ 2019-07-09 5:25 ` Parav Pandit
0 siblings, 0 replies; 3+ messages in thread
From: Parav Pandit @ 2019-07-09 5:25 UTC (permalink / raw)
To: Jason Gunthorpe, Leon Romanovsky
Cc: Doug Ledford, RDMA mailing list, Leon Romanovsky
> -----Original Message-----
> From: Jason Gunthorpe <jgg@ziepe.ca>
> Sent: Tuesday, July 9, 2019 1:31 AM
> To: Leon Romanovsky <leon@kernel.org>
> Cc: Doug Ledford <dledford@redhat.com>; Parav Pandit
> <parav@mellanox.com>; RDMA mailing list <linux-rdma@vger.kernel.org>;
> Leon Romanovsky <leonro@mellanox.com>
> Subject: Re: [PATCH rdma-next] RDMA/core: Annotate destroy of mutex to
> ensure that it is released as unlocked
>
> On Thu, Jul 04, 2019 at 04:00:12PM +0300, Leon Romanovsky wrote:
> > From: Parav Pandit <parav@mellanox.com>
> >
> > While compiled with CONFIG_DEBUG_MUTEXES, the kernel ensures that
> > mutex is not held during destroy.
> > Hence add mutex_destroy() for mutexes used in RDMA modules.
> >
> > Signed-off-by: Parav Pandit <parav@mellanox.com>
> > Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> > drivers/infiniband/core/cache.c | 1 +
> > drivers/infiniband/core/cma_configfs.c | 1 +
> > drivers/infiniband/core/device.c | 3 +++
> > drivers/infiniband/core/user_mad.c | 2 +-
> > drivers/infiniband/core/uverbs_main.c | 2 ++
> > drivers/infiniband/core/verbs.c | 1 +
> > 6 files changed, 9 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/infiniband/core/cache.c
> > b/drivers/infiniband/core/cache.c index 18e476b3ced0..00fb3eacda19
> > 100644
> > +++ b/drivers/infiniband/core/cache.c
> > @@ -810,6 +810,7 @@ static void release_gid_table(struct ib_device
> *device,
> > if (leak)
> > return;
> >
> > + mutex_destroy(&table->lock);
> > kfree(table->data_vec);
> > kfree(table);
> > }
> > diff --git a/drivers/infiniband/core/cma_configfs.c
> > b/drivers/infiniband/core/cma_configfs.c
> > index 3ec2c415bb70..0a7b5eba2fc0 100644
> > +++ b/drivers/infiniband/core/cma_configfs.c
> > @@ -350,4 +350,5 @@ int __init cma_configfs_init(void) void __exit
> > cma_configfs_exit(void) {
> > configfs_unregister_subsystem(&cma_subsys);
> > + mutex_destroy(&cma_subsys.su_mutex);
> > }
>
> There is a missing mutex_destroy in cma_configfs_init's error path.
>
Ack. Adding it.
> > diff --git a/drivers/infiniband/core/device.c
> > b/drivers/infiniband/core/device.c
> > index 7f4affe8a10d..adf8d93bb42d 100644
> > +++ b/drivers/infiniband/core/device.c
> > @@ -508,6 +508,9 @@ static void ib_device_release(struct device *device)
> > rcu_head);
> > }
> >
> > + mutex_destroy(&dev->unregistration_lock);
> > + mutex_destroy(&dev->compat_devs_mutex);
> > +
> > xa_destroy(&dev->compat_devs);
> > xa_destroy(&dev->client_data);
> > kfree_rcu(dev, rcu_head);
> > diff --git a/drivers/infiniband/core/user_mad.c
> > b/drivers/infiniband/core/user_mad.c
> > index 9f8a48016b41..e0512aef033c 100644
> > +++ b/drivers/infiniband/core/user_mad.c
> > @@ -1038,7 +1038,7 @@ static int ib_umad_close(struct inode *inode, struct
> file *filp)
> > ib_unregister_mad_agent(file->agent[i]);
> >
> > mutex_unlock(&file->port->file_mutex);
> > -
> > + mutex_destroy(&file->mutex);
> > kfree(file);
>
> The file->port->file_mutex is missing a destroy in ib_umad_dev_free (bit tricky
> to do)
>
I will leave this for now and address in second iteration.
> > return 0;
> > }
> > diff --git a/drivers/infiniband/core/uverbs_main.c
> > b/drivers/infiniband/core/uverbs_main.c
> > index 11c13c1381cf..4827aa3415ff 100644
> > +++ b/drivers/infiniband/core/uverbs_main.c
> > @@ -120,6 +120,8 @@ static void ib_uverbs_release_dev(struct device
> > *device)
> >
> > uverbs_destroy_api(dev->uapi);
> > cleanup_srcu_struct(&dev->disassociate_srcu);
> > + mutex_destroy(&dev->lists_mutex);
> > + mutex_destroy(&dev->xrcd_tree_mutex);
>
> This file also has ucontext_lock and umap_lock that are missing destroy
>
Ack. Adding it.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-07-09 5:25 UTC | newest]
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2019-07-04 13:00 [PATCH rdma-next] RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked Leon Romanovsky
2019-07-08 20:01 ` Jason Gunthorpe
2019-07-09 5:25 ` Parav Pandit
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