cve-2022-48894
Vulnerability from cvelistv5
Published
2024-08-21 06:10
Modified
2024-12-19 08:10
Severity ?
EPSS score ?
0.03% (0.047)
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32ea2c57dc216b6ad8125fa680d31daa5d421c95Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ead3e6c79479890444c777fd329afc125fecde48Patch
Impacted products
Vendor Product Version
Linux Linux Version: 57365a04c92126525a58bf7a1599ddfa832415e9
Version: 57365a04c92126525a58bf7a1599ddfa832415e9
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   Linux Linux Version: 6.1
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