linux-kernel - Re: [PATCH v2] fault-injection: Enhance failcmd to exit on non-hex address input

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Message-ID: <CAC5umyg90wADke-YRC2vqrcf6Dh=47HmQ4GApQd8dNeJ6BHG7g@mail.gmail.com>
Date: Tue, 30 Jul 2024 23:05:37 +0900
From: Akinobu Mita <akinobu.mita@...il.com>
To: Breno Leitao <leitao@...ian.org>
Cc: akpm@...ux-foundation.org, leit@...a.com, 
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] fault-injection: Enhance failcmd to exit on non-hex
 address input

2024年7月29日(月) 17:45 Breno Leitao <leitao@...ian.org>:
>
> The failcmd.sh script in the fault-injection toolkit does not currently
> validate whether the provided address is in hexadecimal format. This can
> lead to silent failures if the address is sourced from places like
> `/proc/kallsyms`, which omits the '0x' prefix, potentially causing users
> to operate under incorrect assumptions.
>
> Introduce a new function, `exit_if_not_hex`, which checks the format of
> the provided address and exits with an error message if the address is
> not a valid hexadecimal number.
>
> This enhancement prevents users from running the command with
> improperly formatted addresses, thus improving the robustness and
> usability of the failcmd tool.
>
> Signed-off-by: Breno Leitao <leitao@...ian.org>

Looks good.

Reviewed-by: Akinobu Mita <akinobu.mita@...il.com>