From: Parav Pandit <parav@mellanox.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
kwankhede@nvidia.com, alex.williamson@redhat.com
Cc: cjia@nvidia.com, parav@mellanox.com
Subject: [PATCHv2 01/10] vfio/mdev: Avoid release parent reference during error path
Date: Tue, 30 Apr 2019 17:49:28 -0500 [thread overview]
Message-ID: <20190430224937.57156-2-parav@mellanox.com> (raw)
In-Reply-To: <20190430224937.57156-1-parav@mellanox.com>
During mdev parent registration in mdev_register_device(),
if parent device is duplicate, it releases the reference of existing
parent device.
This is incorrect. Existing parent device should not be touched.
Fixes: 7b96953bc640 ("vfio: Mediated device Core driver")
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed By: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
---
drivers/vfio/mdev/mdev_core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index b96fedc77ee5..1299d2e72ce2 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -181,6 +181,7 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
/* Check for duplicate */
parent = __find_parent_device(dev);
if (parent) {
+ parent = NULL;
ret = -EEXIST;
goto add_dev_err;
}
--
2.19.2
next prev parent reply other threads:[~2019-04-30 22:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 22:49 [PATCHv2 00/10] vfio/mdev: Improve vfio/mdev core module Parav Pandit
2019-04-30 22:49 ` Parav Pandit [this message]
2019-04-30 22:49 ` [PATCHv2 02/10] vfio/mdev: Removed unused kref Parav Pandit
2019-04-30 22:49 ` [PATCHv2 03/10] vfio/mdev: Drop redundant extern for exported symbols Parav Pandit
2019-04-30 22:49 ` [PATCHv2 04/10] vfio/mdev: Avoid masking error code to EBUSY Parav Pandit
2019-04-30 22:49 ` [PATCHv2 05/10] vfio/mdev: Follow correct remove sequence Parav Pandit
2019-04-30 22:49 ` [PATCHv2 06/10] vfio/mdev: Fix aborting mdev child device removal if one fails Parav Pandit
2019-04-30 22:49 ` [PATCHv2 07/10] vfio/mdev: Avoid inline get and put parent helpers Parav Pandit
2019-04-30 22:49 ` [PATCHv2 08/10] vfio/mdev: Improve the create/remove sequence Parav Pandit
2019-05-08 17:09 ` Cornelia Huck
2019-05-08 22:06 ` Parav Pandit
2019-05-09 9:06 ` Cornelia Huck
2019-05-09 16:26 ` Pierre Morel
2019-05-09 22:12 ` Halil Pasic
2019-05-09 19:19 ` Parav Pandit
2019-05-10 7:08 ` Pierre Morel
2019-05-14 20:34 ` Parav Pandit
2019-05-14 22:20 ` Alex Williamson
2019-05-15 20:42 ` Parav Pandit
2019-04-30 22:49 ` [PATCHv2 09/10] vfio/mdev: Avoid creating sysfs remove file on stale device removal Parav Pandit
2019-05-08 17:16 ` Cornelia Huck
2019-05-08 22:13 ` Parav Pandit
2019-05-09 9:18 ` Cornelia Huck
2019-05-09 16:16 ` Parav Pandit
2019-04-30 22:49 ` [PATCHv2 10/10] vfio/mdev: Synchronize device create/remove with parent removal Parav Pandit
2019-05-09 2:46 ` Alex Williamson
2019-05-09 9:49 ` Cornelia Huck
2019-05-09 16:14 ` Parav Pandit
2019-05-09 16:03 ` Parav Pandit
2019-05-06 22:03 ` [PATCHv2 00/10] vfio/mdev: Improve vfio/mdev core module Alex Williamson
2019-05-06 23:22 ` Parav Pandit
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