From: Ammar Faizi <ammarfaizi2@gnuweeb.org>
To: Yazen Ghannam <yazen.ghannam@amd.com>
Cc: Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Tony Luck <tony.luck@intel.com>,
linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org,
gwml@vger.gnuweeb.org, x86@kernel.org, stable@vger.kernel.org,
Alviro Iskandar Setiawan <alviro.iskandar@gmail.com>,
Jiri Hladky <hladky.jiri@googlemail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
Subject: Re: [PATCH v4 2/2] x86/mce/amd: Fix memory leak when `threshold_create_bank()` fails
Date: Mon, 7 Mar 2022 07:27:44 +0700 [thread overview]
Message-ID: <b18bac61-a27f-8de5-8aa5-10bda9309ac5@gnuweeb.org> (raw)
In-Reply-To: <9dfe087a-f941-1bc4-657d-7e7c198888ff@gnuweeb.org>
On 3/3/22 9:32 AM, Ammar Faizi wrote:
> It looks like this now. Yazen, Alviro, please review the
> following patch. If you think it looks good, I will submit
> it for the v5.
>
> From 91a447f837d502b7a040cd68f333fb98f4b941d9 Mon Sep 17 00:00:00 2001
> From: Ammar Faizi <ammarfaizi2@gnuweeb.org>
> Date: Thu, 3 Mar 2022 09:22:17 +0700
> Subject: [PATCH v5 2/2] x86/MCE/AMD: Fix memory leak when `threshold_create_bank()` fails
>
> In mce_threshold_create_device(), if threshold_create_bank() fails, the
> @bp will be leaked, because mce_threshold_remove_device() will not free
> the @bp. It only frees the @bp when we've already written the @bp to
> the @threshold_banks per-CPU variable, but at the point, we haven't.
>
> Fix this by extracting the cleanup part into a new static function
> _mce_threshold_remove_device(), then use it from create/remove device
> function. Also, eliminate the "goto out_err". Just early return inside
> the loop if we fail.
>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: stable@vger.kernel.org # v5.8+
> Fixes: 6458de97fc15 ("x86/mce/amd: Straighten CPU hotplug path")
> Co-authored-by: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
> Signed-off-by: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
> Co-authored-by: Yazen Ghannam <yazen.ghannam@amd.com>
> Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
> Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Hi,
It's Monday morning...
Friendly ping for Yazen from AMD. What do you think of this patch? If
it looks good, I will submit it for the v5 revision. See the ref below
if you lost track of the full message.
Ref: https://lore.kernel.org/lkml/9dfe087a-f941-1bc4-657d-7e7c198888ff@gnuweeb.org/
Thanks!
--
Ammar Faizi
next prev parent reply other threads:[~2022-03-07 0:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-01 9:46 [PATCH v4 0/2] Two x86 fixes Ammar Faizi
2022-03-01 9:46 ` [PATCH v4 1/2] x86/delay: Fix the wrong asm constraint in `delay_loop()` Ammar Faizi
2022-03-01 9:54 ` David Laight
2022-03-03 0:14 ` Ammar Faizi
2022-03-01 11:33 ` Alviro Iskandar Setiawan
2022-03-03 0:06 ` Ammar Faizi
2022-03-03 0:35 ` David Laight
2022-03-01 9:46 ` [PATCH v4 2/2] x86/mce/amd: Fix memory leak when `threshold_create_bank()` fails Ammar Faizi
2022-03-02 17:26 ` Yazen Ghannam
2022-03-02 23:20 ` Ammar Faizi
2022-03-02 23:27 ` Ammar Faizi
2022-03-03 1:58 ` Alviro Iskandar Setiawan
2022-03-03 2:07 ` Ammar Faizi
2022-03-03 2:32 ` Ammar Faizi
2022-03-03 2:51 ` Alviro Iskandar Setiawan
2022-03-07 0:27 ` Ammar Faizi [this message]
2022-03-09 20:55 ` Yazen Ghannam
2022-03-10 1:56 ` Ammar Faizi
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