linux-kernel - Re: [PATCH v5] gpio: sim: fix an invalid _

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Message-ID: <CAMRc=MfFmuiAOv3kU4njnvMT=87Yf6e6oCLHbzK6Td-MnNqZMw@mail.gmail.com>
Date:   Fri, 22 Sep 2023 10:54:12 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Kent Gibson <warthog618@...il.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        akpm@...ux-foundation.org
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v5] gpio: sim: fix an invalid __free() usage

On Wed, Sep 20, 2023 at 9:32 AM Bartosz Golaszewski <brgl@...ev.pl> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> gpio_sim_make_line_names() returns NULL or ERR_PTR() so we must not use
> __free(kfree) on the returned address. Split this function into two, one
> that determines the size of the "gpio-line-names" array to allocate and
> one that actually sets the names at correct offsets. The allocation and
> assignment of the managed pointer happens in between.
>
> Fixes: 3faf89f27aab ("gpio: sim: simplify code with cleanup helpers")
> Reported-by: Alexey Dobriyan <adobriyan@...il.com>
> Closes: https://lore.kernel.org/all/07c32bf1-6c1a-49d9-b97d-f0ae4a2b42ab@p183/
> Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
> Hopefully this is the last version of this patch. I restored the max()
> assignment from v3 but kept the code simpler than v2. Tested most corner
> cases that occurred to me.
>

Patch queued for fixes.

Bartosz