CVE-2024-42099 Information

Description

In the Linux kernel the following vulnerability has been resolved:

s390/dasd: Fix invalid dereferencing of indirect CCW data pointer

Fix invalid dereferencing of indirect CCW data pointer in dasd_eckd_dump_sense() that leads to a kernel panic in error cases.

When using indirect addressing for DASD CCWs (IDAW) the CCW CDA pointer does not contain the data address itself but a pointer to the IDAL. This needs to be translated from physical to virtual as well before using it.

This dereferencing is also used for dasd_page_cache and also fixed although it is very unlikely that this code path ever gets used.

Reference

https://git.kernel.org/stable/c/c116475f7d6410b1e6d399207ac75de6cf9c3652 https://git.kernel.org/stable/c/b3a58f3b90f564f42a5c35778d8c5107b2c2150b