* [PATCH -next v3] crypto: hisilicon - switch to memdup_user_nul()
@ 2021-05-24 9:47 Zou Wei
2021-06-03 12:28 ` Herbert Xu
0 siblings, 1 reply; 2+ messages in thread
From: Zou Wei @ 2021-05-24 9:47 UTC (permalink / raw)
To: wangzhou1, herbert, davem; +Cc: linux-crypto, linux-kernel, Zou Wei
Use memdup_user_nul() helper instead of open-coding to
simplify the code.
v1-->v2:
fixed patch title error
v2-->v3:
return the actual error
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
---
drivers/crypto/hisilicon/qm.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 8f7ea50..8b389c2 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -1571,16 +1571,9 @@ static ssize_t qm_cmd_write(struct file *filp, const char __user *buffer,
if (count > QM_DBG_WRITE_LEN)
return -ENOSPC;
- cmd_buf = kzalloc(count + 1, GFP_KERNEL);
- if (!cmd_buf)
- return -ENOMEM;
-
- if (copy_from_user(cmd_buf, buffer, count)) {
- kfree(cmd_buf);
- return -EFAULT;
- }
-
- cmd_buf[count] = '\0';
+ cmd_buf = memdup_user_nul(buffer, count);
+ if (IS_ERR(cmd_buf))
+ return PTR_ERR(cmd_buf);
cmd_buf_tmp = strchr(cmd_buf, '\n');
if (cmd_buf_tmp) {
--
2.6.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH -next v3] crypto: hisilicon - switch to memdup_user_nul()
2021-05-24 9:47 [PATCH -next v3] crypto: hisilicon - switch to memdup_user_nul() Zou Wei
@ 2021-06-03 12:28 ` Herbert Xu
0 siblings, 0 replies; 2+ messages in thread
From: Herbert Xu @ 2021-06-03 12:28 UTC (permalink / raw)
To: Zou Wei; +Cc: wangzhou1, davem, linux-crypto, linux-kernel
On Mon, May 24, 2021 at 05:47:08PM +0800, Zou Wei wrote:
> Use memdup_user_nul() helper instead of open-coding to
> simplify the code.
>
> v1-->v2:
> fixed patch title error
> v2-->v3:
> return the actual error
>
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Zou Wei <zou_wei@huawei.com>
> ---
> drivers/crypto/hisilicon/qm.c | 13 +++----------
> 1 file changed, 3 insertions(+), 10 deletions(-)
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply [flat|nested] 2+ messages in thread
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