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;
