diff options
| author | Tian Tao <tiantao6@hisilicon.com> | 2021-05-20 15:59:45 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-14 17:06:23 +0200 |
| commit | b2e7f2f9701c4c282d1390228af3ff97227e4a5b (patch) | |
| tree | 53f0580e25d6fab500dcc728af7175793fb94342 /arch | |
| parent | cab7a8c8ac9c01a7fcb5c9155501b703b1847e90 (diff) | |
arm64: perf: Convert snprintf to sysfs_emit
[ Upstream commit a5740e955540181f4ab8f076cc9795c6bbe4d730 ]
Use sysfs_emit instead of snprintf to avoid buf overrun,because in
sysfs_emit it strictly checks whether buf is null or buf whether
pagesize aligned, otherwise it returns an error.
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Link: https://lore.kernel.org/r/1621497585-30887-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kernel/perf_event.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index f594957e29bd..44b6eda69a81 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -312,7 +312,7 @@ static ssize_t slots_show(struct device *dev, struct device_attribute *attr, struct arm_pmu *cpu_pmu = container_of(pmu, struct arm_pmu, pmu); u32 slots = cpu_pmu->reg_pmmir & ARMV8_PMU_SLOTS_MASK; - return snprintf(page, PAGE_SIZE, "0x%08x\n", slots); + return sysfs_emit(page, "0x%08x\n", slots); } static DEVICE_ATTR_RO(slots); |