ocfs2: validate l_tree_depth to avoid out-of-bounds access

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate l_tree_depth to avoid out-of-bounds access The l_tree_depth field is 16-bit (__le16), but the actual maximum depth is limited to OCFS2_MAX_PATH_DEPTH. Add a check to prevent out-of-bounds access if l_tree_depth has an invalid value, which may occur when reading from a corrupted mounted disk [1].

References

• https://git.kernel.org/stable/c/ef34840bda333fe99bafbd2d73b70ceaaf9eba66
• https://git.kernel.org/stable/c/538ed8b049ef801a86c543433e5061a91cc106e3
• https://git.kernel.org/stable/c/17c99ab3db2ba74096d36c69daa6e784e98fc0b8
• https://git.kernel.org/stable/c/11e24802e73362aa2948ee16b8fb4e32635d5b2a
• https://git.kernel.org/stable/c/3d012ba4404a0bb517658699ba85e6abda386dc3
• https://git.kernel.org/stable/c/49d2a2ea9d30991bae82107f9523915b91637683
• https://git.kernel.org/stable/c/b942f88fe7d2d789e51c5c30a675fa1c126f5a6d
• https://git.kernel.org/stable/c/e95d97c9c8cd0c239b7b59c79be0f6a9dcf7905c
• https://git.kernel.org/stable/c/a406aff8c05115119127c962cbbbbd202e1973ef