From: Guangbin Huang <huangguangbin2@huawei.com> driver inclusion category: bugfix bugzilla: NA CVE: NA This patch modifies return value from 0 to -ENOSPC when buffer size is greater than limit value, as in this case means the string buffer is lllegal. Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com> Reviewed-by: Peng Li <lipeng321@huawei.com> Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c index 8cb4b3b..d8b506e 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c @@ -330,7 +330,7 @@ static ssize_t hns3_dbg_cmd_write(struct file *filp, const char __user *buffer, return 0; if (count > HNS3_DBG_WRITE_LEN) - return 0; + return -ENOSPC; cmd_buf = kzalloc(count + 1, GFP_KERNEL); if (!cmd_buf) -- 1.8.3