linux-kernel - [PATCH v2 04/10] crypto: hisilicon/zip - replace 'sprintf' with 'scnprintf'

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Message-ID: <1599466922-10323-5-git-send-email-shenyang39@huawei.com>
Date:   Mon, 7 Sep 2020 16:21:56 +0800
From:   Yang Shen <shenyang39@...wei.com>
To:     <herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC:     <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
        <xuzaibo@...wei.com>, <wangzhou1@...ilicon.com>
Subject: [PATCH v2 04/10] crypto: hisilicon/zip - replace 'sprintf' with 'scnprintf'

Replace 'sprintf' with 'scnprintf' to avoid overrun.

Signed-off-by: Yang Shen <shenyang39@...wei.com>
Reviewed-by: Zhou Wang <wangzhou1@...ilicon.com>
---
 drivers/crypto/hisilicon/zip/zip_main.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/hisilicon/zip/zip_main.c b/drivers/crypto/hisilicon/zip/zip_main.c
index df1a16f..dd2c326 100644
--- a/drivers/crypto/hisilicon/zip/zip_main.c
+++ b/drivers/crypto/hisilicon/zip/zip_main.c
@@ -428,7 +428,7 @@ static ssize_t hisi_zip_ctrl_debug_read(struct file *filp, char __user *buf,
 		return -EINVAL;
 	}
 	spin_unlock_irq(&file->lock);
-	ret = sprintf(tbuf, "%u\n", val);
+	ret = scnprintf(tbuf, sizeof(tbuf), "%u\n", val);
 	return simple_read_from_buffer(buf, count, pos, tbuf, ret);
 }
 
@@ -518,9 +518,10 @@ static int hisi_zip_core_debug_init(struct hisi_qm *qm)
 
 	for (i = 0; i < HZIP_CORE_NUM; i++) {
 		if (i < HZIP_COMP_CORE_NUM)
-			sprintf(buf, "comp_core%d", i);
+			scnprintf(buf, sizeof(buf), "comp_core%d", i);
 		else
-			sprintf(buf, "decomp_core%d", i - HZIP_COMP_CORE_NUM);
+			scnprintf(buf, sizeof(buf), "decomp_core%d",
+				  i - HZIP_COMP_CORE_NUM);
 
 		regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
 		if (!regset)
-- 
2.7.4