Description
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Block region delete during region creation Expand the range lock, rename it "regions_lock", to disable region deletion in the critical period between construct_region() and attach_target(), as well as the period between device_add() and registering the remove actions. Otherwise, userspace can confuse the kernel. It can violate the assumption the region stays registered through the completion of cxl_add_to_region(). It can violate the assumption that devm_add_action_or_reset() is working with a live 'struct cxl_region'. It is ok for the region to disappear outside of those windows as that mirrors device hotplug flows where the proper locks are held.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a32320b71f085f8d82afedcf285f1682c8c00aed to < 8efa9fcc1d31b29b31e0ac4efe48624a729796bcaffecteda32320b71f085f8d82afedcf285f1682c8c00aed to < ecc86a28dc27509da511bb3f8c309750233e3177affecteda32320b71f085f8d82afedcf285f1682c8c00aed to < 98c7e206af48b4433b2192cc1a538db2acc49876affecteda32320b71f085f8d82afedcf285f1682c8c00aed to < b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8affecteda32320b71f085f8d82afedcf285f1682c8c00aed to < d91feb88692e81b00cd22f0125cfcd04970b4a0baffected
Linux Linux
Default version status: affected
6.3affected0 to < 6.3unaffected6.6.160 to ≤ 6.6.*unaffected6.12.114 to ≤ 6.12.*unaffected6.18.57 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/8efa9fcc1d31b29b31e0ac4efe48624a729796bc ↗
- https://git.kernel.org/stable/c/ecc86a28dc27509da511bb3f8c309750233e3177 ↗
- https://git.kernel.org/stable/c/98c7e206af48b4433b2192cc1a538db2acc49876 ↗
- https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8 ↗
- https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b ↗