CVE-2023-53077 Information

Description

In the Linux kernel the following vulnerability has been resolved:

drm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes

[WHY] When PTEBufferSizeInRequests is zero UBSAN reports the following warning because dml_log2 returns an unexpected negative value:

shift exponent 4294966273 is too large for 32-bit type ‘int’

[HOW]

In the case PTEBufferSizeInRequests is zero skip the dml_log2() and assign the result directly.

Reference

https://git.kernel.org/stable/c/031f196d1b1b6d5dfcb0533b431e3ab1750e6189 https://git.kernel.org/stable/c/7257070be70e19a9138f39009c1a26c83a8a7cfa https://git.kernel.org/stable/c/a16394b5d661afec9a264fecac3abd87aea439ea https://git.kernel.org/stable/c/bec1bea2fa974e63f6059c33edde669c7894d0bc https://git.kernel.org/stable/c/e12b95680821b9880cd9992c0f3555389363604f