CVE-2022-49083

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommu/omap: Fix regression in probe for NULL pointer dereference<br /> <br /> Commit 3f6634d997db ("iommu: Use right way to retrieve iommu_ops") started<br /> triggering a NULL pointer dereference for some omap variants:<br /> <br /> __iommu_probe_device from probe_iommu_group+0x2c/0x38<br /> probe_iommu_group from bus_for_each_dev+0x74/0xbc<br /> bus_for_each_dev from bus_iommu_probe+0x34/0x2e8<br /> bus_iommu_probe from bus_set_iommu+0x80/0xc8<br /> bus_set_iommu from omap_iommu_init+0x88/0xcc<br /> omap_iommu_init from do_one_initcall+0x44/0x24<br /> <br /> This is caused by omap iommu probe returning 0 instead of ERR_PTR(-ENODEV)<br /> as noted by Jason Gunthorpe .<br /> <br /> Looks like the regression already happened with an earlier commit<br /> 6785eb9105e3 ("iommu/omap: Convert to probe/release_device() call-backs")<br /> that changed the function return type and missed converting one place.