diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2021-04-01 18:36:45 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-02 14:56:38 +0200 |
| commit | f032e2cdf9003ed076c8866a2e7f5003eeabcff8 (patch) | |
| tree | cf74a9bea7ecbeede3ca7e1bd7d499a634dab9cb /drivers/staging/greybus | |
| parent | 0778f04b0b36dcd51c1dfcaf77a326eacff73329 (diff) | |
| download | linux-f032e2cdf9003ed076c8866a2e7f5003eeabcff8.tar.bz2 | |
staging: greybus: camera: Switch to memdup_user_nul()
Use memdup_user_nul() helper instead of open-coding to
simplify the code.
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210401103645.1558813-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/greybus')
| -rw-r--r-- | drivers/staging/greybus/camera.c | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/staging/greybus/camera.c b/drivers/staging/greybus/camera.c index b570e13394ac..cdbb42cd413b 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); |