linux-hardening - Re: [PATCH] firmware: meson_sm: Fix memcpy vs iomem type warnings

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Date:   Mon, 17 Oct 2022 17:25:13 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel test robot <lkp@...el.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-amlogic@...ts.infradead.org,
        Kevin Hilman <khilman@...libre.com>
Subject: Re: [PATCH] firmware: meson_sm: Fix memcpy vs iomem type warnings

Hi,

On Wed, 12 Oct 2022 11:53:16 -0700, Kees Cook wrote:
> Use memcpy_{toio,fromio}() instead of memcpy(). Silences warnings from
> Sparse:
> 
> drivers/firmware/meson/meson_sm.c:170:17: warning: incorrect type in argument 1 (different address spaces)
> drivers/firmware/meson/meson_sm.c:170:17:    expected void const *
> drivers/firmware/meson/meson_sm.c:170:17:    got void [noderef] __iomem *sm_shmem_out_base
> drivers/firmware/meson/meson_sm.c:170:17: warning: incorrect type in argument 2 (different address spaces)
> drivers/firmware/meson/meson_sm.c:170:17:    expected void const *
> drivers/firmware/meson/meson_sm.c:170:17:    got void [noderef] __iomem *sm_shmem_out_base
> drivers/firmware/meson/meson_sm.c:206:9: warning: incorrect type in argument 1 (different address spaces)
> drivers/firmware/meson/meson_sm.c:206:9:    expected void const *
> drivers/firmware/meson/meson_sm.c:206:9:    got void [noderef] __iomem *sm_shmem_in_base
> drivers/firmware/meson/meson_sm.c:206:9: warning: incorrect type in argument 1 (different address spaces)
> drivers/firmware/meson/meson_sm.c:206:9:    expected void const *
> drivers/firmware/meson/meson_sm.c:206:9:    got void [noderef] __iomem *sm_shmem_in_base
> drivers/firmware/meson/meson_sm.c:206:9: warning: incorrect type in argument 1 (different address spaces)
> drivers/firmware/meson/meson_sm.c:206:9:    expected void const *
> drivers/firmware/meson/meson_sm.c:206:9:    got void [noderef] __iomem *sm_shmem_in_base
> drivers/firmware/meson/meson_sm.c:206:9: warning: incorrect type in argument 1 (different address spaces)
> drivers/firmware/meson/meson_sm.c:206:9:    expected void *
> drivers/firmware/meson/meson_sm.c:206:9:    got void [noderef] __iomem *sm_shmem_in_base
> 
> [...]

Thanks, Applied to https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux.git (v6.2/drivers)

[1/1] firmware: meson_sm: Fix memcpy vs iomem type warnings
      https://git.kernel.org/amlogic/c/7dc69c7d073e6004a281db8f7f15cf6ebf702ea0

These changes has been applied on the intermediate git tree [1].

The v6.2/drivers branch will then be sent via a formal Pull Request to the Linux SoC maintainers
for inclusion in their intermediate git branches in order to be sent to Linus during
the next merge window, or sooner if it's a set of fixes.

In the cases of fixes, those will be merged in the current release candidate
kernel and as soon they appear on the Linux master branch they will be
backported to the previous Stable and Long-Stable kernels [2].

The intermediate git branches are merged daily in the linux-next tree [3],
people are encouraged testing these pre-release kernels and report issues on the
relevant mailing-lists.

If problems are discovered on those changes, please submit a signed-off-by revert
patch followed by a corrective changeset.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux.git
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
[3] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

-- 
Neil