This is a note to let you know that I've just added the patch titled
ep93xx: clock: Fix off by one in ep93xx_div_recalc_rate()
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ep93xx-clock-fix-off-by-one-in-ep93xx_div_recalc_rat.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c6585d483e104139e90be828e13e0dcc3d20e7ec
Author: Dan Carpenter <alexander.sverdlin@xxxxxxxxx>
Date: Wed Sep 11 10:39:15 2024 +0300
ep93xx: clock: Fix off by one in ep93xx_div_recalc_rate()
[ Upstream commit c7f06284a6427475e3df742215535ec3f6cd9662 ]
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: 9645ccc7bd7a ("ep93xx: clock: convert in-place to COMMON_CLK")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
Reviewed-by: Nikita Shubin <nikita.shubin@xxxxxxxxxxx>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
Link: https://lore.kernel.org/r/1caf01ad4c0a8069535813c26c7f0b8ea011155e.camel@xxxxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
index 85a496ddc6197..e9f72a529b508 100644
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -359,7 +359,7 @@ static unsigned long ep93xx_div_recalc_rate(struct clk_hw *hw,
u32 val = __raw_readl(psc->reg);
u8 index = (val & psc->mask) >> psc->shift;
- if (index > psc->num_div)
+ if (index >= psc->num_div)
return 0;
return DIV_ROUND_UP_ULL(parent_rate, psc->div[index]);
