This is a note to let you know that I've just added the patch titled
arm64: topology: fix possible overflow in amu_fie_setup()
to the 5.10-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:
arm64-topology-fix-possible-overflow-in-amu_fie_setup.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d4955c0ad77dbc684fc716387070ac24801b8bca Mon Sep 17 00:00:00 2001
From: Sergey Shtylyov <s.shtylyov@xxxxxx>
Date: Fri, 16 Sep 2022 23:17:07 +0300
Subject: arm64: topology: fix possible overflow in amu_fie_setup()
From: Sergey Shtylyov <s.shtylyov@xxxxxx>
commit d4955c0ad77dbc684fc716387070ac24801b8bca upstream.
cpufreq_get_hw_max_freq() returns max frequency in kHz as *unsigned int*,
while freq_inv_set_max_ratio() gets passed this frequency in Hz as 'u64'.
Multiplying max frequency by 1000 can potentially result in overflow --
multiplying by 1000ULL instead should avoid that...
Found by Linux Verification Center (linuxtesting.org) with the SVACE static
analysis tool.
Fixes: cd0ed03a8903 ("arm64: use activity monitors for frequency invariance")
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
Link: https://lore.kernel.org/r/01493d64-2bce-d968-86dc-11a122a9c07d@xxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kernel/topology.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -158,7 +158,7 @@ static int validate_cpu_freq_invariance_
}
/* Convert maximum frequency from KHz to Hz and validate */
- max_freq_hz = cpufreq_get_hw_max_freq(cpu) * 1000;
+ max_freq_hz = cpufreq_get_hw_max_freq(cpu) * 1000ULL;
if (unlikely(!max_freq_hz)) {
pr_debug("CPU%d: invalid maximum frequency.\n", cpu);
return -EINVAL;
Patches currently in stable-queue which might be from s.shtylyov@xxxxxx are
queue-5.10/arm64-topology-fix-possible-overflow-in-amu_fie_setup.patch
