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Change History

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.

https://git.kernel.org/stable/c/222ca305c9fd39e5ed8104da25c09b2b79a516a8

https://git.kernel.org/stable/c/99801e2f457824955da4aadaa035913a6dede03a

https://git.kernel.org/stable/c/a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8

https://git.kernel.org/stable/c/e65d28d4e9bf90a35ba79c06661a572a38391dec