drivers/perf: convert sysfs sprintf family to sysfs_emit
sprintf does not know the PAGE_SIZE maximum of the temporary buffer
used for sysfs content and it's possible to overrun the buffer length.
Use sysfs_emit() function to ensures that no overrun is done.
Signed-off-by: Qi Liu <liuqi115@huawei.com>
Link: https://lore.kernel.org/r/1616148273-16374-4-git-send-email-liuqi115@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c
index f2a8550..b6c2511 100644
--- a/drivers/perf/arm_dmc620_pmu.c
+++ b/drivers/perf/arm_dmc620_pmu.c
@@ -113,7 +113,7 @@ dmc620_pmu_event_show(struct device *dev,
eattr = container_of(attr, typeof(*eattr), attr);
- return sprintf(page, "event=0x%x,clkdiv2=0x%x\n", eattr->eventid, eattr->clkdiv2);
+ return sysfs_emit(page, "event=0x%x,clkdiv2=0x%x\n", eattr->eventid, eattr->clkdiv2);
}
#define DMC620_PMU_EVENT_ATTR(_name, _eventid, _clkdiv2) \