linux-kernel - Re: [PATCH v2] bridge: Fix error path for kobject_init_and

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Date:   Fri, 10 May 2019 15:06:22 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     tobin@...nel.org
Cc:     gregkh@...uxfoundation.org, roopa@...ulusnetworks.com,
        nikolay@...ulusnetworks.com, tyhicks@...onical.com,
        bridge@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] bridge: Fix error path for kobject_init_and_add()

From: "Tobin C. Harding" <tobin@...nel.org>
Date: Fri, 10 May 2019 12:52:12 +1000

> Currently error return from kobject_init_and_add() is not followed by a
> call to kobject_put().  This means there is a memory leak.  We currently
> set p to NULL so that kfree() may be called on it as a noop, the code is
> arguably clearer if we move the kfree() up closer to where it is
> called (instead of after goto jump).
> 
> Remove a goto label 'err1' and jump to call to kobject_put() in error
> return from kobject_init_and_add() fixing the memory leak.  Re-name goto
> label 'put_back' to 'err1' now that we don't use err1, following current
> nomenclature (err1, err2 ...).  Move call to kfree out of the error
> code at bottom of function up to closer to where memory was allocated.
> Add comment to clarify call to kfree().
> 
> Signed-off-by: Tobin C. Harding <tobin@...nel.org>
> ---
> 
> v1 was a part of a set.  I have dropped the other patch until I can work
> out a correct solution.

Applied and queued up for -stable, thanks.