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authorQi Liu <liuqi115@huawei.com>2021-03-19 18:04:33 +0800
committerWill Deacon <will@kernel.org>2021-03-25 12:55:44 +0000
commitfb62d67586afc046f3783d819985c737f6b0b666 (patch)
tree812c6b649bc448360dbdf0c19c40e87f27e7962f /drivers/perf/qcom_l3_pmu.c
parent9ec9f9cf8660d549c77e719d2ce11647a03063b9 (diff)
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>
Diffstat (limited to 'drivers/perf/qcom_l3_pmu.c')
-rw-r--r--drivers/perf/qcom_l3_pmu.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/perf/qcom_l3_pmu.c b/drivers/perf/qcom_l3_pmu.c
index fb34b87b9471..bba078077c93 100644
--- a/drivers/perf/qcom_l3_pmu.c
+++ b/drivers/perf/qcom_l3_pmu.c
@@ -615,7 +615,7 @@ static ssize_t l3cache_pmu_format_show(struct device *dev,
struct dev_ext_attribute *eattr;
eattr = container_of(attr, struct dev_ext_attribute, attr);
- return sprintf(buf, "%s\n", (char *) eattr->var);
+ return sysfs_emit(buf, "%s\n", (char *) eattr->var);
}
#define L3CACHE_PMU_FORMAT_ATTR(_name, _config) \
@@ -643,7 +643,7 @@ static ssize_t l3cache_pmu_event_show(struct device *dev,
struct perf_pmu_events_attr *pmu_attr;
pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
- return sprintf(page, "event=0x%02llx\n", pmu_attr->id);
+ return sysfs_emit(page, "event=0x%02llx\n", pmu_attr->id);
}
#define L3CACHE_EVENT_ATTR(_name, _id) \