CVE-2023-53327 iommufd/selftest: Catch overflow of uptr and length

In the Linux kernel, the following vulnerability has been resolved: iommufd/selftest: Catch overflow of uptr and length syzkaller hits a WARNON when trying to have a uptr close to UINTPTRMAX: WARNING: CPU: 1 PID: 393 at drivers/iommu/iommufd/selftest.c:403 iommufdtest+0xb19/0x16f0 Modules linked...