Re: [PATCH] arm64: Fix kernel address detection of __is_lm_address()

On Tue, 26 Jan 2021 13:40:56 +0000, Vincenzo Frascino wrote:

Currently, the __is_lm_address() check just masks out the top 12 bits of the address, but if they are 0, it still yields a true result. This has as a side effect that virt_addr_valid() returns true even for invalid virtual addresses (e.g. 0x0).

Fix the detection checking that it's actually a kernel address starting at PAGE_OFFSET.

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: Fix kernel address detection of __is_lm_address() https://git.kernel.org/arm64/c/519ea6f1c82f