clk: bcm: rpi: Prevent out-of-bounds access
[ Upstream commit bc163555 ] 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: 93d2725a ("clk: bcm: rpi: Discover the firmware clocks") Link: https://github.com/raspberrypi/firmware/issues/1688 Suggested-by: Phil Elwell <phil@raspberrypi.com> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Link: https://lore.kernel.org/r/20220713154953.3336-2-stefan.wahren@i2se.com Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Ivan T. Ivanov <iivanov@suse.de> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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