CVE-2022-49083

Summary

In the Linux kernel, the following vulnerability has been resolved:

iommu/omap: Fix regression in probe for NULL pointer dereference

Commit 3f6634d997db ("iommu: Use right way to retrieve iommu_ops") started triggering a NULL pointer dereference for some omap variants:

__iommu_probe_device from probe_iommu_group+0x2c/0x38 probe_iommu_group from bus_for_each_dev+0x74/0xbc bus_for_each_dev from bus_iommu_probe+0x34/0x2e8 bus_iommu_probe from bus_set_iommu+0x80/0xc8 bus_set_iommu from omap_iommu_init+0x88/0xcc omap_iommu_init from do_one_initcall+0x44/0x24

This is caused by omap iommu probe returning 0 instead of ERR_PTR(-ENODEV) as noted by Jason Gunthorpe <jgg@ziepe.ca>.

Looks like the regression already happened with an earlier commit 6785eb9105e3 ("iommu/omap: Convert to probe/release_device() call-backs") that changed the function return type and missed converting one place.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux6785eb9105e3363aa51408c700a55e8b5f88fcf6 < bd905fed87ce01ac010011bb8f44ed0140116cebaffected
LinuxLinux6785eb9105e3363aa51408c700a55e8b5f88fcf6 < 47e239117bd97c8556f9187af7a9a7938db4e021affected
LinuxLinux6785eb9105e3363aa51408c700a55e8b5f88fcf6 < ea518578aa8a9a0280605b53cc33f707e10c8178affected
LinuxLinux6785eb9105e3363aa51408c700a55e8b5f88fcf6 < 1d89f2b9eadbcf3ce93c6d7238f68299a1f84968affected
LinuxLinux6785eb9105e3363aa51408c700a55e8b5f88fcf6 < 71ff461c3f41f6465434b9e980c01782763e7ad8affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.111 <= 5.10.*unaffected
LinuxLinux5.15.34 <= 5.15.*unaffected
LinuxLinux5.16.20 <= 5.16.*unaffected
LinuxLinux5.17.3 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

References