Thread (3 messages) 3 messages, 2 authors, 2023-08-03

Re: [PATCH] x86/paravirt: Fix tlb_remove_table function callback prototype warning

From: Kees Cook <hidden>
Date: 2023-08-03 22:43:06
Also in: linux-hardening, lkml, llvm

On Wed, 26 Jul 2023 16:11:43 -0700, Kees Cook wrote:
Under W=1, this warning is visible in Clang 16 and newer:

arch/x86/kernel/paravirt.c:337:4: warning: cast from 'void (*)(struct mmu_gather *, struct page *)' to 'void (*)(struct mmu_gather *, void *)' converts to incompatible function type [-Wcast-function-type-strict]
                           (void (*)(struct mmu_gather *, void *))tlb_remove_page,
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Add a direct wrapper instead, which will make this warning (and
potential KCFI failures) go away.

[...]
Applied to for-next/hardening, thanks!

[1/1] x86/paravirt: Fix tlb_remove_table function callback prototype warning
      https://git.kernel.org/kees/c/fcce1c6cb156

Take care,

-- 
Kees Cook

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