linux-kernel - Re: [PATCH] kernel/module: Fix memleak in module_add_modinfo

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Date:   Wed, 8 Jan 2020 17:24:12 +0100
From:   Jessica Yu <jeyu@...nel.org>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     mbenes@...e.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel/module: Fix memleak in module_add_modinfo_attrs()

+++ YueHaibing [28/12/19 19:54 +0800]:
>In module_add_modinfo_attrs() if sysfs_create_file() fails
>on the first iteration of the loop (so i = 0), we forget to
>free the modinfo_attrs.
>
>Fixes: bc6f2a757d52 ("kernel/module: Fix mem leak in module_add_modinfo_attrs")
>Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Applied, thanks!

Jessica

>---
> kernel/module.c | 2 ++
> 1 file changed, 2 insertions(+)
>
>diff --git a/kernel/module.c b/kernel/module.c
>index c3770b2..8ec670e 100644
>--- a/kernel/module.c
>+++ b/kernel/module.c
>@@ -1784,6 +1784,8 @@ static int module_add_modinfo_attrs(struct module *mod)
> error_out:
> 	if (i > 0)
> 		module_remove_modinfo_attrs(mod, --i);
>+	else
>+		kfree(mod->modinfo_attrs);
> 	return error;
> }
>
>-- 
>2.7.4
>
>