Re: [PATCH] arm64: Avoid premature usercopy failure

On Mon, 12 Jul 2021 15:27:46 +0100, Robin Murphy wrote:

Al reminds us that the usercopy API must only return complete failure if absolutely nothing could be copied. Currently, if userspace does something silly like giving us an unaligned pointer to Device memory, or a size which overruns MTE tag bounds, we may fail to honour that requirement when faulting on a multi-byte access even though a smaller access could have succeeded.

[...]

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

[1/1] arm64: Avoid premature usercopy failure https://git.kernel.org/arm64/c/295cf156231c

Cheers,