linux-kernel - Re: [PATCH] riscv: Avoid fortify warning in syscall_get

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Message-Id: 
 <174481386901.3385191.15884470264391337876.git-patchwork-notify@kernel.org>
Date: Wed, 16 Apr 2025 14:31:09 +0000
From: patchwork-bot+linux-riscv@...nel.org
To: Nathan Chancellor <nathan@...nel.org>
Cc: linux-riscv@...ts.infradead.org, paul.walmsley@...ive.com,
 palmer@...belt.com, aou@...s.berkeley.edu, alex@...ti.fr,
 charlie@...osinc.com, ldv@...ace.io, kees@...nel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: Avoid fortify warning in syscall_get_arguments()

Hello:

This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer@...osinc.com>:

On Wed, 09 Apr 2025 14:24:46 -0700 you wrote:
> When building with CONFIG_FORTIFY_SOURCE=y and W=1, there is a warning
> because of the memcpy() in syscall_get_arguments():
> 
>   In file included from include/linux/string.h:392,
>                    from include/linux/bitmap.h:13,
>                    from include/linux/cpumask.h:12,
>                    from arch/riscv/include/asm/processor.h:55,
>                    from include/linux/sched.h:13,
>                    from kernel/ptrace.c:13:
>   In function 'fortify_memcpy_chk',
>       inlined from 'syscall_get_arguments.isra' at arch/riscv/include/asm/syscall.h:66:2:
>   include/linux/fortify-string.h:580:25: error: call to '__read_overflow2_field' declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Werror=attribute-warning]
>     580 |                         __read_overflow2_field(q_size_field, size);
>         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   cc1: all warnings being treated as errors
> 
> [...]

Here is the summary with links:
  - riscv: Avoid fortify warning in syscall_get_arguments()
    https://git.kernel.org/riscv/c/adf53771a312

You are awesome, thank you!
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