linux-kernel - Re: [PATCH 2/5] module: Remove unnecessary +1 from last_unloaded

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Message-ID: <e836cb49-0afe-4a28-801e-3daa4981f642@kernel.org>
Date: Wed, 16 Jul 2025 21:49:46 +0200
From: Daniel Gomez <da.gomez@...nel.org>
To: Petr Pavlu <petr.pavlu@...e.com>, Luis Chamberlain <mcgrof@...nel.org>,
 Sami Tolvanen <samitolvanen@...gle.com>, Daniel Gomez <da.gomez@...sung.com>
Cc: linux-modules@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] module: Remove unnecessary +1 from
 last_unloaded_module::name size

On 30/06/2025 16.32, Petr Pavlu wrote:
> The variable last_unloaded_module::name tracks the name of the last
> unloaded module. It is a string copy of module::name, which is
> MODULE_NAME_LEN bytes in size and includes the NUL terminator. Therefore,
> the size of last_unloaded_module::name can also be just MODULE_NAME_LEN,
> without the need for an extra byte.
> 
> Fixes: e14af7eeb47e ("debug: track and print last unloaded module in the oops trace")
> Signed-off-by: Petr Pavlu <petr.pavlu@...e.com>
> ---
>  kernel/module/main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/module/main.c b/kernel/module/main.c
> index 933a9854cb7d..04173543639c 100644
> --- a/kernel/module/main.c
> +++ b/kernel/module/main.c
> @@ -580,7 +580,7 @@ MODINFO_ATTR(version);
>  MODINFO_ATTR(srcversion);
>  
>  static struct {
> -	char name[MODULE_NAME_LEN + 1];
> +	char name[MODULE_NAME_LEN];
>  	char taints[MODULE_FLAGS_BUF_SIZE];
>  } last_unloaded_module;
>  

LGTM,

Reviewed-by: Daniel Gomez <da.gomez@...sung.com>