Linux Kernel RDMA/hfi1 Integer Multiplication Overflow Vulnerability

A vulnerability in the Linux kernel's RDMA/hfi1 component could lead to integer multiplication overflow errors. This issue arises when values of different types are multiplied, potentially causing an overflow even if the result is stored in a larger type, as the conversion occurs after the multiplication. The vulnerability affects the inter-packet delay calculation, where the overflow could result in incorrect values. The issue has been addressed by modifying the calculation to ensure one operand is a 64-bit unsigned integer, preventing the overflow by promoting the other operand accordingly.

Impact

Exploitation of this vulnerability could lead to incorrect calculations in the inter-packet delay, potentially causing performance issues or disruptions in data transmission.