CVE-2024-42306

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

udf: Avoid using corrupted block bitmap buffer

When the filesystem block bitmap is corrupted, we detect the corruption

while loading the bitmap and fail the allocation with error. However the

next allocation from the same bitmap will notice the bitmap buffer is

already loaded and tries to allocate from the bitmap with mixed results

(depending on the exact nature of the bitmap corruption). Fix the

problem by using BH_verified bit to indicate whether the bitmap is valid

or not.