hfs: fix slab-out-of-bounds in hfs_bnode_read()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: hfs: fix slab-out-of-bounds in hfs_bnode_read() This patch introduces is_bnode_offset_valid() method that checks the requested offset value. Also, it introduces check_and_correct_requested_length() method that checks and correct the requested length (if it is necessary). These methods are used in hfs_bnode_read(), hfs_bnode_write(), hfs_bnode_clear(), hfs_bnode_copy(), and hfs_bnode_move() with the goal to prevent the access out of allocated memory and triggering the crash.

References

• https://git.kernel.org/stable/c/e7d2dc2421e821e4045775e6dc226378328de6f6
• https://git.kernel.org/stable/c/67ecc81f6492275c9c54280532f558483c99c90e
• https://git.kernel.org/stable/c/a1a60e79502279f996e55052f50cc14919020475
• https://git.kernel.org/stable/c/fe2891a9c43ab87d1a210d61e6438ca6936e2f62
• https://git.kernel.org/stable/c/384a66b89f9540a9a8cb0f48807697dfabaece4c
• https://git.kernel.org/stable/c/efc095b35b23297e419c2ab4fc1ed1a8f0781a29
• https://git.kernel.org/stable/c/fc7f732984ec91f30be3e574e0644066d07f2b78
• https://git.kernel.org/stable/c/eec522fd0d28106b14a59ab2d658605febe4a3bb
• https://git.kernel.org/stable/c/a431930c9bac518bf99d6b1da526a7f37ddee8d8