linux-kernel - Re: [PATCH v2] selftests/x86/lam: Zero out buffer for readlink()

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Message-ID: <20231016084723.icjv6mj64ocx2hoj@box>
Date:   Mon, 16 Oct 2023 11:47:23 +0300
From:   kirill.shutemov@...ux.intel.com
To:     Binbin Wu <binbin.wu@...ux.intel.com>
Cc:     dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        shuah@...nel.org, linux-kselftest@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] selftests/x86/lam: Zero out buffer for readlink()

On Mon, Oct 16, 2023 at 02:24:46PM +0800, Binbin Wu wrote:
> Zero out the buffer for readlink() since readlink() does not append a
> terminating null byte to the buffer.  Also change the buffer length
> passed to readlink() to 'PATH_MAX - 1' to ensure the resulting string
> is always null terminated.
> 
> Fixes: 833c12ce0f430 ("selftests/x86/lam: Add inherit test cases for linear-address masking")
> 
> Signed-off-by: Binbin Wu <binbin.wu@...ux.intel.com>

Reviewed-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

-- 
  Kiryl Shutsemau / Kirill A. Shutemov