CVE-2022-48630 Information

Description

In the Linux kernel the following vulnerability has been resolved:

crypto: qcom-rng - fix infinite loop on requests not multiple of WORD_SZ

The commit referenced in the Fixes tag removed the ‘break’ from the else branch in qcom_rng_read() causing an infinite loop whenever ‘max’ is not a multiple of WORD_SZ. This can be reproduced e.g. by running:

kcapi-rng -b 67 >/dev/null

There are many ways to fix this without adding back the ‘break’ but they all seem more awkward than simply adding it back so do just that.

Tested on a machine with Qualcomm Amberwing processor.

Reference

https://git.kernel.org/stable/c/71a89789552b7faf3ef27969b9bc783fa0df3550 https://git.kernel.org/stable/c/8be06f62b426801dba43ddf8893952a0e62ab6ae https://git.kernel.org/stable/c/233a3cc60e7a8fe0be8cf9934ae7b67ba25a866c https://git.kernel.org/stable/c/8a06f25f5941c145773204f2f7abef95b4ffb8ce https://git.kernel.org/stable/c/05d4d17475d8d094c519bb51658bc47899c175e3 https://git.kernel.org/stable/c/16287397ec5c08aa58db6acf7dbc55470d78087d