clk: scpi: bound-check DVFS index in scpi_dvfs_recalc_rate

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dvfs_get_idx() may return an out-of-range index if the SCP firmware is
buggy or returns a stale value. Only negative indexes were rejected, so a
large index walked past info->opps and could treat garbage as a clock rate
(KASAN OOB / wrong frequency to consumers). The missing upper bound dates
back to the original SCPI clock driver.

Treat indexes >= opp count as invalid and return 0, same as idx < 0.

Fixes: cd52c2a4b5 ("clk: add support for clocks provided by SCP(System Control Processor)")
Signed-off-by: Xixin Liu <liuxixin@kylinos.cn>
Link: https://patch.msgid.link/04f9ab766e07.v2.1785200642.git.liuxixin@kylinos.cn
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>

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Xixin Liu 2026-07-28 08:50:00 +08:00 • committed by Sudeep Holla

parent 32471d84a4

commit 70f4b78d56

1 changed files with 1 additions and 1 deletions

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drivers/clk/clk-scpi.c

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