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ep93xx: clock: Fix off by one in ep93xx_div_recalc_rate()

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[ Upstream commit c7f06284a6 ]

The psc->div[] array has psc->num_div elements.  These values come from
when we call clk_hw_register_div().  It's adc_divisors and
ARRAY_SIZE(adc_divisors)) and so on.  So this condition needs to be >=
instead of > to prevent an out of bounds read.

Fixes: 9645ccc7bd ("ep93xx: clock: convert in-place to COMMON_CLK")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Reviewed-by: Nikita Shubin <nikita.shubin@maquefel.me>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Link: https://lore.kernel.org/r/1caf01ad4c0a8069535813c26c7f0b8ea011155e.camel@linaro.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2024-09-11 10:39:15 +03:00 committed by Greg Kroah-Hartman
parent ca64edd7ae
commit 66e78ade97
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mach-ep93xx/clock.c
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@ -359,7 +359,7 @@ static unsigned long ep93xx_div_recalc_rate(struct clk_hw *hw,
u32 val = __raw_readl(psc->reg); u32 val = __raw_readl(psc->reg);
u8 index = (val & psc->mask) >> psc->shift; u8 index = (val & psc->mask) >> psc->shift;
if (index > psc->num_div) if (index >= psc->num_div)
return 0; return 0;
return DIV_ROUND_UP_ULL(parent_rate, psc->div[index]); return DIV_ROUND_UP_ULL(parent_rate, psc->div[index]);