Linux-ARM-MSM Archive on lore.kernel.org
 help / color / Atom feed
From: Stephen Boyd <sboyd@kernel.org>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Michael Turquette <mturquette@baylibre.com>
Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
	dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
	Rob Clark <robdclark@chromium.org>,
	Daniel Palmer <daniel@0x0f.com>
Subject: Re: [PATCH] clk: fixed: fix double free in resource managed fixed-factor clock
Date: Wed, 07 Apr 2021 15:41:49 -0700
Message-ID: <161783530964.3790633.16412468884239960912@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <20210406230606.3007138-1-dmitry.baryshkov@linaro.org>

Quoting Dmitry Baryshkov (2021-04-06 16:06:06)
> devm_clk_hw_register_fixed_factor_release(), the release function for
> the devm_clk_hw_register_fixed_factor(), calls
> clk_hw_unregister_fixed_factor(), which will kfree() the clock. However
> after that the devres functions will also kfree the allocated data,
> resulting in double free/memory corruption. Just call
> clk_hw_unregister() instead, leaving kfree() to devres code.
> 
> Reported-by: Rob Clark <robdclark@chromium.org>
> Cc: Daniel Palmer <daniel@0x0f.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
> 
> Stephen, this fix affects the DSI PHY rework. Do we have a chance of
> getting it into 5.12, otherwise there will be a cross-dependency between
> msm-next and clk-next.

Think I can get this into the last fixes PR. One question though, I
think this follows the pattern that things like clk-divider.c use for
devm. Are those also broken?

  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-06 23:06 Dmitry Baryshkov
2021-04-07  9:00 ` Dmitry Baryshkov
2021-04-07 11:38 ` Daniel Palmer
2021-04-07 22:41 ` Stephen Boyd [this message]
2021-04-07 22:57   ` Dmitry Baryshkov
     [not found]     ` <161783803315.3790633.10829887417379757624@swboyd.mtv.corp.google.com>
2021-04-08  0:52       ` Dmitry Baryshkov
2021-04-08  7:32         ` Stephen Boyd
2021-04-07 23:01 ` Stephen Boyd

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=161783530964.3790633.16412468884239960912@swboyd.mtv.corp.google.com \
    --to=sboyd@kernel.org \
    --cc=agross@kernel.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=daniel@0x0f.com \
    --cc=dmitry.baryshkov@linaro.org \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=freedreno@lists.freedesktop.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-clk@vger.kernel.org \
    --cc=mturquette@baylibre.com \
    --cc=robdclark@chromium.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-ARM-MSM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-arm-msm/0 linux-arm-msm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-arm-msm linux-arm-msm/ https://lore.kernel.org/linux-arm-msm \
		linux-arm-msm@vger.kernel.org
	public-inbox-index linux-arm-msm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-arm-msm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git