* [PATCH -next v3] staging: greybus: camera: Switch to memdup_user_nul()
@ 2021-04-01 10:36 Yang Yingliang
2021-04-01 11:00 ` Dan Carpenter
0 siblings, 1 reply; 2+ messages in thread
From: Yang Yingliang @ 2021-04-01 10:36 UTC (permalink / raw)
To: linux-kernel, linux-staging; +Cc: johan, elder, gregkh
Use memdup_user_nul() helper instead of open-coding to
simplify the code.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
v3:
remove duplicate ';'
v2:
delete unnecessary blank line
use return PTR_ERR(kbuf) instead
---
drivers/staging/greybus/camera.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/drivers/staging/greybus/camera.c b/drivers/staging/greybus/camera.c
index b570e13394ac..2ecdc1bc5092 100644
--- a/drivers/staging/greybus/camera.c
+++ b/drivers/staging/greybus/camera.c
@@ -1120,16 +1120,9 @@ static ssize_t gb_camera_debugfs_write(struct file *file,
if (len > 1024)
return -EINVAL;
- kbuf = kmalloc(len + 1, GFP_KERNEL);
- if (!kbuf)
- return -ENOMEM;
-
- if (copy_from_user(kbuf, buf, len)) {
- ret = -EFAULT;
- goto done;
- }
-
- kbuf[len] = '\0';
+ kbuf = memdup_user_nul(buf, len);
+ if (IS_ERR(kbuf))
+ return PTR_ERR(kbuf);
ret = op->execute(gcam, kbuf, len);
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH -next v3] staging: greybus: camera: Switch to memdup_user_nul()
2021-04-01 10:36 [PATCH -next v3] staging: greybus: camera: Switch to memdup_user_nul() Yang Yingliang
@ 2021-04-01 11:00 ` Dan Carpenter
0 siblings, 0 replies; 2+ messages in thread
From: Dan Carpenter @ 2021-04-01 11:00 UTC (permalink / raw)
To: Yang Yingliang; +Cc: linux-kernel, linux-staging, johan, elder, gregkh
On Thu, Apr 01, 2021 at 06:36:45PM +0800, Yang Yingliang wrote:
> Use memdup_user_nul() helper instead of open-coding to
> simplify the code.
>
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Thanks!
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
regards,
dan carpenter
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-04-01 11:00 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-01 10:36 [PATCH -next v3] staging: greybus: camera: Switch to memdup_user_nul() Yang Yingliang
2021-04-01 11:00 ` Dan Carpenter
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.