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| author | Parav Pandit <parav@mellanox.com> | 2019-05-01 01:49:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 16:50:45 +0300 |
| commit | 5c5492ee3e8c2b1656da012112496b65da21c55f (patch) | |
| tree | 5739cdb13316e971f98c9c69fe7465d1d57ce899 /drivers/vfio | |
| parent | 4dcb3d8ab2f90e689921747dcb26dc8c360da913 (diff) | |
| download | linux-5c5492ee3e8c2b1656da012112496b65da21c55f.tar.xz | |
vfio/mdev: Avoid release parent reference during error path
[ Upstream commit 60e7f2c3fe9919cee9534b422865eed49f4efb15 ]
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>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/mdev/mdev_core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index 0212f0ee8aea..8cfa71230877 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -182,6 +182,7 @@ 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; } |