Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Don't unregister on shutdown Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdown path, which removes the IOMMU groups with no coordination whatsoever with their users - shutdown methods are optional in device drivers. This can lead to NULL pointer dereferences in those drivers' DMA API calls, or worse. Instead of calling the full arm_smmu_device_remove() from arm_smmu_device_shutdown(), let's pick only the relevant function call - arm_smmu_device_disable() - more or less the reverse of arm_smmu_device_reset() - and call just that from the shutdown path.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 57365a04c92126525a58bf7a1599ddfa832415e9 before ead3e6c79479890444c777fd329afc125fecde48; affected 57365a04c92126525a58bf7a1599ddfa832415e9 before 32ea2c57dc216b6ad8125fa680d31daa5d421c95 |
| Linux / Linux | affected 6.1; unaffected 0 before 6.1; unaffected 6.1.7 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ead3e6c79479890444c777fd329afc125fecde48
- https://git.kernel.org/stable/c/32ea2c57dc216b6ad8125fa680d31daa5d421c95
ADP enrichment
No English description supplied.
No references supplied.