CVE-2023-52619 Information

Description

In the Linux kernel the following vulnerability has been resolved:

pstore/ram: Fix crash when setting number of cpus to an odd number

When the number of cpu cores is adjusted to 7 or other odd numbers the zone size will become an odd number. The address of the zone will become: addr of zone0 = BASE addr of zone1 = BASE + zone_size addr of zone2 = BASE + zone_size2 … The address of zone1/3/5/7 will be mapped to non-alignment va. Eventually crashes will occur when accessing these va.

So use ALIGN_DOWN() to make sure the zone size is even to avoid this bug.

Reference

https://git.kernel.org/stable/c/8b69c30f4e8b69131d92096cb296dc1f217101e4 https://git.kernel.org/stable/c/e9f6ac50890104fdf8194f2865680689239d30fb https://git.kernel.org/stable/c/a63e48cd835c34c38ef671d344cc029b1ea5bf10 https://git.kernel.org/stable/c/2a37905d47bffec61e95d99f0c1cc5dc6377956c https://git.kernel.org/stable/c/75b0f71b26b3ad833c5c0670109c0af6e021e86a https://git.kernel.org/stable/c/0593cfd321df9001142a9d2c58d4144917dff7ee https://git.kernel.org/stable/c/cd40e43f870cf21726b22487a95ed223790b3542 https://git.kernel.org/stable/c/d49270a04623ce3c0afddbf3e984cb245aa48e9c