CVE-2022-49815 Information

Description

In the Linux kernel the following vulnerability has been resolved:

erofs: fix missing xas_retry() in fscache mode

The xarray iteration only holds the RCU read lock and thus may encounter XA_RETRY_ENTRY if there’s process modifying the xarray concurrently. This will cause oops when referring to the invalid entry.

Fix this by adding the missing xas_retry() which will make the iteration wind back to the root node if XA_RETRY_ENTRY is encountered.

Reference

https://git.kernel.org/stable/c/37020bbb71d911431e16c2c940b97cf86ae4f2f6 https://git.kernel.org/stable/c/dbc98fe99e17ed18f2f272d5fe880d844b1c68c3