From: Sascha Hauer <sha@pengutronix.de>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH master 1/3] commands: readline: fix memory leak on wrong usage
Date: Mon, 22 Mar 2021 10:18:54 +0100 [thread overview]
Message-ID: <20210322091854.GQ23724@pengutronix.de> (raw)
In-Reply-To: <20210322065527.14428-1-a.fatoum@pengutronix.de>
On Mon, Mar 22, 2021 at 07:55:25AM +0100, Ahmad Fatoum wrote:
> Later error-handling frees buf, but the first early exit doesn't.
> Move buf beyond it to fix the memory leak.
>
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
Applied, thanks
Sascha
> commands/readline.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/commands/readline.c b/commands/readline.c
> index 403ac8563a36..7933a58c08b4 100644
> --- a/commands/readline.c
> +++ b/commands/readline.c
> @@ -10,11 +10,13 @@
>
> static int do_readline(int argc, char *argv[])
> {
> - char *buf = xzalloc(CONFIG_CBSIZE);
> + char *buf;
>
> if (argc < 3)
> return COMMAND_ERROR_USAGE;
>
> + buf = xzalloc(CONFIG_CBSIZE);
> +
> command_slice_release();
>
> if (readline(argv[1], buf, CONFIG_CBSIZE) < 0) {
> --
> 2.29.2
>
>
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prev parent reply other threads:[~2021-03-22 9:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 6:55 Ahmad Fatoum
2021-03-22 6:55 ` [PATCH master 2/3] common: readline: fix possible buffer overflows Ahmad Fatoum
2021-03-22 6:55 ` [PATCH master 3/3] sandbox: fix use of initialized variable in error path Ahmad Fatoum
2021-03-22 9:18 ` Sascha Hauer [this message]
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