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| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-07-17 15:12:07 -0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-07-26 10:20:02 -0300 |
| commit | 31422dff187b243c58f3a97d16bbe9e9ada639fe (patch) | |
| tree | bbcd275d2b3a104270b676506cd8df0febab80dc /lib/asn1_decoder.c | |
| parent | 70eadc7fc7ef29bfe0e361376983822b5e36dd67 (diff) | |
| download | linux-stable-31422dff187b243c58f3a97d16bbe9e9ada639fe.tar.gz linux-stable-31422dff187b243c58f3a97d16bbe9e9ada639fe.tar.bz2 linux-stable-31422dff187b243c58f3a97d16bbe9e9ada639fe.zip | |
iommufd: Fix locking around hwpt allocation
Due to the auto_domains mechanism the ioas->mutex must be held until
the hwpt is completely setup by iommufd_object_abort_and_destroy() or
iommufd_object_finalize().
This prevents a concurrent iommufd_device_auto_get_domain() from seeing
an incompletely initialized object through the ioas->hwpt_list.
To make this more consistent move the unlock until after finalize.
Fixes: e8d57210035b ("iommufd: Add kAPI toward external drivers for physical devices")
Link: https://lore.kernel.org/r/11-v8-6659224517ea+532-iommufd_alloc_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'lib/asn1_decoder.c')
0 files changed, 0 insertions, 0 deletions