CVE-2022-49897 Information

Description

In the Linux kernel the following vulnerability has been resolved:

fscrypt: fix keyring memory leak on mount failure

Commit d7e7b9af104c (scrypt: stop using keyrings subsystem for fscrypt_master_key) moved the keyring destruction from __put_super() to generic_shutdown_super() so that the filesystem’s block device(s) are still available. Unfortunately this causes a memory leak in the case where a mount is attempted with the test_dummy_encryption mount option but the mount fails after the option has already been processed.

To fix this attempt the keyring destruction in both places.

Reference

https://git.kernel.org/stable/c/0b1747653b102c555bac745ebe5ca86cdd20e43f https://git.kernel.org/stable/c/29997a6fa60de1de2fa0de471e7652efa6e95868 https://git.kernel.org/stable/c/ccd30a476f8e864732de220bd50e6f372f5ebcab https://git.kernel.org/stable/c/cff805b1518f38d57866065343db2285f2dcd5ab