linux-kernel - Re: [PATCH v6 0/4] Introduce mseal()

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Date: Fri, 12 Jan 2024 20:53:57 -0800
From: Jeff Xu <jeffxu@...omium.org>
To: Randy Dunlap <rdunlap@...radead.org>
Cc: akpm@...ux-foundation.org, keescook@...omium.org, jannh@...gle.com, 
	sroettger@...gle.com, willy@...radead.org, gregkh@...uxfoundation.org, 
	torvalds@...ux-foundation.org, usama.anjum@...labora.com, jeffxu@...gle.com, 
	jorgelo@...omium.org, groeck@...omium.org, linux-kernel@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-mm@...ck.org, pedro.falcato@...il.com, 
	dave.hansen@...el.com, linux-hardening@...r.kernel.org, deraadt@...nbsd.org
Subject: Re: [PATCH v6 0/4] Introduce mseal()

On Fri, Jan 12, 2024 at 6:20 PM Randy Dunlap <rdunlap@...radead.org> wrote:
>
>
>
> On 1/11/24 15:41, jeffxu@...omium.org wrote:
> > From: Jeff Xu <jeffxu@...gle.com>
> >
> > This patchset proposes a new mseal() syscall for the Linux kernel.
> >
>
> Jeff,
> Building arm64 defconfig, on linux-next-20240112, I get:
>
I don't quite get how this is related to my change.
Can you please send me the steps to reproduce ?  I don't usually build arm.

Thanks
-Jeff


>   CC      arch/arm64/kernel/asm-offsets.s
> In file included from ../include/uapi/linux/mman.h:5,
>                  from ../include/linux/mm.h:33,
>                  from ../include/linux/memblock.h:12,
>                  from ../arch/arm64/include/asm/acpi.h:14,
>                  from ../include/acpi/acpi_io.h:7,
>                  from ../include/linux/acpi.h:39,
>                  from ../include/acpi/apei.h:9,
>                  from ../include/acpi/ghes.h:5,
>                  from ../include/linux/arm_sdei.h:8,
>                  from ../arch/arm64/kernel/asm-offsets.c:10:
> ../arch/arm64/include/asm/mman.h: In function 'arch_calc_vm_prot_bits':
> ../arch/arm64/include/asm/mman.h:15:24: error: 'VM_ARM64_BTI' undeclared (first use in this function); did you mean 'ARM64_BTI'?
>    15 |                 ret |= VM_ARM64_BTI;
>       |                        ^~~~~~~~~~~~
>       |                        ARM64_BTI
> ../arch/arm64/include/asm/mman.h:15:24: note: each undeclared identifier is reported only once for each function it appears in
> ../arch/arm64/include/asm/mman.h:18:24: error: 'VM_MTE' undeclared (first use in this function); did you mean 'VM_MAP'?
>    18 |                 ret |= VM_MTE;
>       |                        ^~~~~~
>       |                        VM_MAP
> ../arch/arm64/include/asm/mman.h: In function 'arch_calc_vm_flag_bits':
> ../arch/arm64/include/asm/mman.h:32:24: error: 'VM_MTE_ALLOWED' undeclared (first use in this function)
>    32 |                 return VM_MTE_ALLOWED;
>       |                        ^~~~~~~~~~~~~~
> ../arch/arm64/include/asm/mman.h: In function 'arch_validate_flags':
> ../arch/arm64/include/asm/mman.h:59:29: error: 'VM_MTE' undeclared (first use in this function); did you mean 'VM_MAP'?
>    59 |         return !(vm_flags & VM_MTE) || (vm_flags & VM_MTE_ALLOWED);
>       |                             ^~~~~~
>       |                             VM_MAP
> ../arch/arm64/include/asm/mman.h:59:52: error: 'VM_MTE_ALLOWED' undeclared (first use in this function)
>    59 |         return !(vm_flags & VM_MTE) || (vm_flags & VM_MTE_ALLOWED);
>       |                                                    ^~~~~~~~~~~~~~
>
>
> --
> #Randy