CVE-2022-49147 block: Fix the maximum minor value is blk_alloc_ext_minor()

In the Linux kernel, the following vulnerability has been resolved: block: Fix the maximum minor value is blkallocextminor idaallocrange..., min, max, ... returns values from min to max, inclusive. So, NREXTDEVT is a valid idx returned by blkallocextminor. This is an issue because in deviceadddis...

PT-2025-3269

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.13.0-rc2-syzkaller-00159-gf932fb9b4074 Description An overflow occurred in the Linux kernel's ring-buffer when performing a calculation. The issue was reported as a slab-out-of-bounds in the rb map vma function...