CVE-2024-42295 Information

Description

In the Linux kernel the following vulnerability has been resolved:

nilfs2: handle inconsistent state in nilfs_btnode_create_block()

Syzbot reported that a buffer state inconsistency was detected in nilfs_btnode_create_block() triggering a kernel bug.

It is not appropriate to treat this inconsistency as a bug; it can occur if the argument block address (the buffer index of the newly created block) is a virtual block number and has been reallocated due to corruption of the bitmap used to manage its allocation state.

So modify nilfs_btnode_create_block() and its callers to treat it as a possible filesystem error rather than triggering a kernel bug.

Reference

https://git.kernel.org/stable/c/012be828a118bf496e666ef1fc47fc0e7358ada2 https://git.kernel.org/stable/c/be56dfc9be0604291267c07b0e27a69a6bda4899 https://git.kernel.org/stable/c/366c3f688dd0288cbe38af1d3a886b5c62372e4a https://git.kernel.org/stable/c/4811f7af6090e8f5a398fbdd766f903ef6c0d787