uaccess: fix integer overflow on access_ok()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: uaccess: fix integer overflow on access_ok() Three architectures check the end of a user access against the address limit without taking a possible overflow into account. Passing a negative length or another overflow in here returns success when it should not. Use the most common correct implementation here, which optimizes for a constant 'size' argument, and turns the common case into a single comparison.

References

• https://git.kernel.org/stable/c/e65d28d4e9bf90a35ba79c06661a572a38391dec
• https://git.kernel.org/stable/c/99801e2f457824955da4aadaa035913a6dede03a
• https://git.kernel.org/stable/c/a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8
• https://git.kernel.org/stable/c/222ca305c9fd39e5ed8104da25c09b2b79a516a8