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: [PATCHv1 1/7] vfio/mdev: Avoid release parent reference during error path
Date: Tue, 26 Mar 2019 22:45:39 -0500 [thread overview]
Message-ID: <1553658345-43995-2-git-send-email-parav@mellanox.com> (raw)
In-Reply-To: <1553658345-43995-1-git-send-email-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: 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 b96fedc..1299d2e 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;
}
--
1.8.3.1
next prev parent reply other threads:[~2019-03-27 3:46 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 3:45 [PATCHv1 0/7] vfio/mdev: Improve vfio/mdev core module Parav Pandit
2019-03-27 3:45 ` Parav Pandit [this message]
2019-04-01 16:58 ` [PATCHv1 1/7] vfio/mdev: Avoid release parent reference during error path Cornelia Huck
2019-03-27 3:45 ` [PATCHv1 2/7] vfio/mdev: Removed unused kref Parav Pandit
2019-04-01 17:01 ` Cornelia Huck
2019-03-27 3:45 ` [PATCHv1 3/7] vfio/mdev: Drop redundant extern for exported symbols Parav Pandit
2019-04-01 17:02 ` Cornelia Huck
2019-03-27 3:45 ` [PATCHv1 4/7] vfio/mdev: Avoid masking error code to EBUSY Parav Pandit
2019-04-01 17:21 ` Cornelia Huck
2019-03-27 3:45 ` [PATCHv1 5/7] vfio/mdev: Follow correct remove sequence Parav Pandit
2019-04-01 17:24 ` Cornelia Huck
2019-03-27 3:45 ` [PATCHv1 6/7] vfio/mdev: Fix aborting mdev child device removal if one fails Parav Pandit
2019-04-01 17:39 ` Cornelia Huck
2019-04-02 19:59 ` Parav Pandit
2019-04-02 22:33 ` Alex Williamson
2019-04-03 6:34 ` Parav Pandit
2019-03-27 3:45 ` [PATCHv1 7/7] vfio/mdev: Fix race conditions with mdev device life cycle APIs Parav Pandit
2019-04-03 21:27 ` Alex Williamson
2019-04-04 0:02 ` Parav Pandit
2019-04-04 20:44 ` Alex Williamson
2019-04-04 23:05 ` Parav Pandit
2019-04-23 19:21 ` Alex Williamson
2019-04-25 23:29 ` Parav Pandit
2019-04-26 15:33 ` Alex Williamson
2019-04-26 15:55 ` Parav Pandit
2019-04-26 16:09 ` Alex Williamson
2019-04-26 19:02 ` Parav Pandit
2019-04-26 21:58 ` Alex Williamson
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