From: Cornelia Huck <cohuck@redhat.com>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: kvm@vger.kernel.org, Alex Williamson <alex.williamson@redhat.com>,
"Raj, Ashok" <ashok.raj@intel.com>,
Bharat Bhushan <Bharat.Bhushan@nxp.com>,
Dan Williams <dan.j.williams@intel.com>,
Daniel Vetter <daniel@ffwll.ch>,
Diana Craciun <diana.craciun@oss.nxp.com>,
Eric Auger <eric.auger@redhat.com>,
Christoph Hellwig <hch@lst.de>,
Leon Romanovsky <leonro@nvidia.com>,
Max Gurtovoy <mgurtovoy@nvidia.com>,
Tarun Gupta <targupta@nvidia.com>
Subject: Re: [PATCH v2 05/14] vfio/fsl-mc: Re-order vfio_fsl_mc_probe()
Date: Tue, 16 Mar 2021 17:28:22 +0100 [thread overview]
Message-ID: <20210316172822.0b44ff76.cohuck@redhat.com> (raw)
In-Reply-To: <5-v2-20d933792272+4ff-vfio1_jgg@nvidia.com>
On Fri, 12 Mar 2021 20:55:57 -0400
Jason Gunthorpe <jgg@nvidia.com> wrote:
> vfio_add_group_dev() must be called only after all of the private data in
> vdev is fully setup and ready, otherwise there could be races with user
> space instantiating a device file descriptor and starting to call ops.
>
> For instance vfio_fsl_mc_reflck_attach() sets vdev->reflck and
> vfio_fsl_mc_open(), called by fops open, unconditionally derefs it, which
> will crash if things get out of order.
>
> This driver started life with the right sequence, but three commits added
> stuff after vfio_add_group_dev().
>
> Fixes: 2e0d29561f59 ("vfio/fsl-mc: Add irq infrastructure for fsl-mc devices")
> Fixes: f2ba7e8c947b ("vfio/fsl-mc: Added lock support in preparation for interrupt handling")
> Fixes: 704f5082d845 ("vfio/fsl-mc: Scan DPRC objects on vfio-fsl-mc driver bind")
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
> ---
> drivers/vfio/fsl-mc/vfio_fsl_mc.c | 43 ++++++++++++++++---------------
> 1 file changed, 22 insertions(+), 21 deletions(-)
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
next prev parent reply other threads:[~2021-03-16 16:29 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-13 0:55 [PATCH v2 00/14] Embed struct vfio_device in all sub-structures Jason Gunthorpe
2021-03-13 0:55 ` [PATCH v2 01/14] vfio: Remove extra put/gets around vfio_device->group Jason Gunthorpe
2021-03-16 7:33 ` Tian, Kevin
2021-03-16 23:07 ` Jason Gunthorpe
2021-03-17 0:47 ` Tian, Kevin
2021-03-19 13:58 ` Jason Gunthorpe
2021-03-16 11:15 ` Max Gurtovoy
2021-03-16 11:59 ` Cornelia Huck
2021-03-18 9:32 ` Auger Eric
2021-03-13 0:55 ` [PATCH v2 02/14] vfio: Simplify the lifetime logic for vfio_device Jason Gunthorpe
2021-03-16 7:38 ` Tian, Kevin
2021-03-16 12:10 ` Cornelia Huck
2021-03-16 20:24 ` Alex Williamson
2021-03-16 23:08 ` Jason Gunthorpe
2021-03-17 8:12 ` Cornelia Huck
2021-03-23 13:06 ` Jason Gunthorpe
2021-03-18 13:10 ` Auger Eric
2021-03-13 0:55 ` [PATCH v2 03/14] vfio: Split creation of a vfio_device into init and register ops Jason Gunthorpe
2021-03-16 7:55 ` Tian, Kevin
2021-03-16 13:34 ` Jason Gunthorpe
2021-03-17 0:55 ` Tian, Kevin
2021-03-16 12:25 ` Cornelia Huck
2021-03-16 21:13 ` Alex Williamson
2021-03-16 23:12 ` Jason Gunthorpe
2021-03-16 12:54 ` Max Gurtovoy
2021-03-18 13:18 ` Auger Eric
2021-03-13 0:55 ` [PATCH v2 04/14] vfio/platform: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-16 16:22 ` Cornelia Huck
2021-03-16 21:33 ` Alex Williamson
2021-03-16 21:45 ` Jason Gunthorpe
2021-03-18 13:40 ` Auger Eric
2021-03-13 0:55 ` [PATCH v2 05/14] vfio/fsl-mc: Re-order vfio_fsl_mc_probe() Jason Gunthorpe
2021-03-15 8:44 ` Christoph Hellwig
2021-03-16 9:16 ` Diana Craciun OSS
2021-03-16 16:28 ` Cornelia Huck [this message]
2021-03-17 16:36 ` Diana Craciun OSS
2021-03-17 22:59 ` Jason Gunthorpe
2021-03-13 0:55 ` [PATCH v2 06/14] vfio/fsl-mc: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-15 8:44 ` Christoph Hellwig
2021-03-16 16:43 ` Cornelia Huck
2021-03-13 0:55 ` [PATCH v2 07/14] vfio/pci: Move VGA and VF initialization to functions Jason Gunthorpe
2021-03-15 8:45 ` Christoph Hellwig
2021-03-15 23:07 ` Jason Gunthorpe
2021-03-16 6:27 ` Christoph Hellwig
2021-03-16 7:57 ` Tian, Kevin
2021-03-16 13:02 ` Max Gurtovoy
2021-03-16 23:04 ` Jason Gunthorpe
2021-03-16 16:51 ` Cornelia Huck
2021-03-18 16:34 ` Auger Eric
2021-03-13 0:56 ` [PATCH v2 08/14] vfio/pci: Re-order vfio_pci_probe() Jason Gunthorpe
2021-03-15 8:46 ` Christoph Hellwig
2021-03-16 8:04 ` Tian, Kevin
2021-03-16 13:20 ` Jason Gunthorpe
2021-03-16 22:27 ` Alex Williamson
2021-03-17 0:56 ` Tian, Kevin
2021-03-16 11:28 ` Max Gurtovoy
2021-03-17 10:32 ` Cornelia Huck
2021-03-18 16:50 ` Auger Eric
2021-03-13 0:56 ` [PATCH v2 09/14] vfio/pci: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-16 8:06 ` Tian, Kevin
2021-03-17 10:33 ` Cornelia Huck
2021-03-18 13:43 ` Auger Eric
2021-03-13 0:56 ` [PATCH v2 10/14] vfio/mdev: " Jason Gunthorpe
2021-03-16 8:09 ` Tian, Kevin
2021-03-16 22:51 ` Alex Williamson
2021-03-16 23:19 ` Jason Gunthorpe
2021-03-17 10:36 ` Cornelia Huck
2021-03-13 0:56 ` [PATCH v2 11/14] vfio/mdev: Make to_mdev_device() into a static inline Jason Gunthorpe
2021-03-16 8:10 ` Tian, Kevin
2021-03-16 22:55 ` Alex Williamson
2021-03-16 23:20 ` Jason Gunthorpe
2021-03-17 10:36 ` Cornelia Huck
2021-03-13 0:56 ` [PATCH v2 12/14] vfio: Make vfio_device_ops pass a 'struct vfio_device *' instead of 'void *' Jason Gunthorpe
2021-03-15 8:58 ` Christoph Hellwig
2021-03-17 11:33 ` Cornelia Huck
2021-03-13 0:56 ` [PATCH v2 13/14] vfio/pci: Replace uses of vfio_device_data() with container_of Jason Gunthorpe
2021-03-16 8:20 ` Tian, Kevin
2021-03-17 12:06 ` Cornelia Huck
2021-03-13 0:56 ` [PATCH v2 14/14] vfio: Remove device_data from the vfio bus driver API Jason Gunthorpe
2021-03-16 8:22 ` Tian, Kevin
2021-03-17 12:08 ` Cornelia Huck
2021-03-17 23:24 ` Max Gurtovoy
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