linux-kernel - Re: [PATCH] can: j1939: undo increment when j1939_local_ecu

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Message-ID: <aLqf0-WGRA8-Qb15@pengutronix.de>
Date: Fri, 5 Sep 2025 10:31:15 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc: Robin van der Gracht <robin@...tonic.nl>, kernel@...gutronix.de,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Maxime Jayat <maxime.jayat@...ile-devices.fr>,
	Elenita Hinds <ecathinds@...il.com>,
	Bastian Stender <bst@...gutronix.de>, linux-can@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] can: j1939: undo increment when j1939_local_ecu_get()
 fails

On Sun, Aug 24, 2025 at 07:27:40PM +0900, Tetsuo Handa wrote:
> Since j1939_sk_bind() and j1939_sk_release() call j1939_local_ecu_put()
> when J1939_SOCK_BOUND was already set, but the error handling path for
> j1939_sk_bind() will not set J1939_SOCK_BOUND when j1939_local_ecu_get()
> fails, j1939_local_ecu_get() needs to undo priv->ents[sa].nusers++ when
> j1939_local_ecu_get() returns an error.
> 
> Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
> Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>

Tested-by: Oleksij Rempel <o.rempel@...gutronix.de>                                                                                                             
Acked-by: Oleksij Rempel <o.rempel@...gutronix.de>

Thank you!
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