Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: don't rely on user vaddr alignment There is no guaranteed alignment for user pointers, however the calculation of an offset of the first page into a folio after coalescing uses some weird bit mask logic, get rid of it.

References 3

• git.kernel.org https://git.kernel.org/stable/c/3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b
• git.kernel.org https://git.kernel.org/stable/c/50998b0ae7d9d552e96d8b7239981cf05f65eff5
• git.kernel.org https://git.kernel.org/stable/c/f16769241594be59387b56ab525e327f54377e60

Remediation