iommufd: Release current IOAS on xa_store() failure

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In the Linux kernel, the following vulnerability has been resolved: iommufd: Release current IOAS on xa_store() failure iommufd_take_all_iova_rwsem() takes an object reference and the iova_rwsem write lock before storing the IOAS in the temporary ioas_list xarray. If xa_store() fails, the current IOAS has not been inserted into ioas_list yet. iommufd_release_all_iova_rwsem() only unwinds IOAS objects already present in that xarray, so it cannot release the current IOAS. Release the current IOAS rwsem and object reference before unwinding the previously stored entries.

Source published

11 Sep 2026 19:43:13 UTC

Source modified

19 Oct 2026 08:46:55 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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