Re: [PATCH 4/5] intc/exynos4210_gic: fix format-overflow warning

["Philippe Mathieu-Daudé" <philippe.mathieu.daude@gmail.com>]

On 28/3/22 11:15, Peter Maydell wrote:
> On Mon, 28 Mar 2022 at 09:48, <marcandre.lureau@redhat.com> wrote:
>>
>> From: Marc-André Lureau <marcandre.lureau@redhat.com>
>>
>> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
>> ---
>>   hw/intc/exynos4210_gic.c | 9 +++------
>>   1 file changed, 3 insertions(+), 6 deletions(-)
>>
>> diff --git a/hw/intc/exynos4210_gic.c b/hw/intc/exynos4210_gic.c
>> index bc73d1f11524..5b6f4330a5f3 100644
>> --- a/hw/intc/exynos4210_gic.c
>> +++ b/hw/intc/exynos4210_gic.c
>> @@ -289,10 +289,6 @@ static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
>>       Object *obj = OBJECT(dev);
>>       Exynos4210GicState *s = EXYNOS4210_GIC(obj);
>>       SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
>> -    const char cpu_prefix[] = "exynos4210-gic-alias_cpu";
>> -    const char dist_prefix[] = "exynos4210-gic-alias_dist";
>> -    char cpu_alias_name[sizeof(cpu_prefix) + 3];
>> -    char dist_alias_name[sizeof(cpu_prefix) + 3];
>>       SysBusDevice *gicbusdev;
>>       uint32_t n = s->num_cpu;
>>       uint32_t i;
>> @@ -322,8 +318,10 @@ static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
>>        */
>>       assert(n <= EXYNOS4210_NCPUS);
>>       for (i = 0; i < n; i++) {
>> +        g_autofree char *cpu_alias_name = g_strdup_printf("exynos4210-gic-alias_cpu%x", i);
>> +        g_autofree char *dist_alias_name = g_strdup_printf("exynos4210-gic-alias_dist%x", i);

Dubious '%x' format... Maybe change to '%u'?

>>           /* Map CPU interface per SMP Core */
>> -        sprintf(cpu_alias_name, "%s%x", cpu_prefix, i);
>>           memory_region_init_alias(&s->cpu_alias[i], obj,
>>                                    cpu_alias_name,
>>                                    sysbus_mmio_get_region(gicbusdev, 1),
>> @@ -333,7 +331,6 @@ static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
>>                   EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(i), &s->cpu_alias[i]);
>>
>>           /* Map Distributor per SMP Core */
>> -        sprintf(dist_alias_name, "%s%x", dist_prefix, i);
>>           memory_region_init_alias(&s->dist_alias[i], obj,
>>                                    dist_alias_name,
>>                                    sysbus_mmio_get_region(gicbusdev, 0),
>> --
> 
> More false positives, but here the new code is massively better than the old.
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> 
> thanks
> -- PMM
>