linux-kernel - Re: [PATCH 1/3] clk: bcm: rpi: Prevent out-of-bounds access

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Message-Id: <20220823225203.92B6DC433D6@smtp.kernel.org>
Date:   Tue, 23 Aug 2022 15:52:01 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stefan Wahren <stefan.wahren@...e.com>
Cc:     bcm-kernel-feedback-list@...adcom.com,
        Maxime Ripard <maxime@...no.tech>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Stefan Wahren <stefan.wahren@...e.com>,
        Phil Elwell <phil@...pberrypi.com>
Subject: Re: [PATCH 1/3] clk: bcm: rpi: Prevent out-of-bounds access

Quoting Stefan Wahren (2022-07-13 08:49:51)
> The while loop in raspberrypi_discover_clocks() relies on the assumption
> that the id of the last clock element is zero. Because this data comes
> from the Videocore firmware and it doesn't guarantuee such a behavior
> this could lead to out-of-bounds access. So fix this by providing
> a sentinel element.
> 
> Fixes: 93d2725affd6 ("clk: bcm: rpi: Discover the firmware clocks")
> Link: https://github.com/raspberrypi/firmware/issues/1688
> Suggested-by: Phil Elwell <phil@...pberrypi.com>
> Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
> ---

Applied to clk-fixes