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| author | Vasyl Gomonovych <gomonovych@gmail.com> | 2017-11-22 18:25:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-07 20:45:31 +0300 |
| commit | 30b7a2c19e296fc4b8a9a21d67752d8dd55bc7dc (patch) | |
| tree | 6e20370f3d7d53d2d30531f210d9b0c0edd0f861 /drivers/misc/mic | |
| parent | eecf4f9dd940fc90b38693ec6cde9badf0bea56a (diff) | |
| download | linux-30b7a2c19e296fc4b8a9a21d67752d8dd55bc7dc.tar.xz | |
misc: mic: Use memdup_user() as a cleanup
Fix coccicheck warning which recommends to use memdup_user():
drivers/misc/mic/vop/vop_vringh.c:940:14-21: WARNING opportunity for memdup_user
drivers/misc/mic/vop/vop_vringh.c:998:8-15: WARNING opportunity for memdup_user
Generated by: scripts/coccinelle/memdup_user/memdup_user.cocci
Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mic')
| -rw-r--r-- | drivers/misc/mic/vop/vop_vringh.c | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/drivers/misc/mic/vop/vop_vringh.c b/drivers/misc/mic/vop/vop_vringh.c index fed992e2c258..bde0305ebd91 100644 --- a/drivers/misc/mic/vop/vop_vringh.c +++ b/drivers/misc/mic/vop/vop_vringh.c @@ -937,13 +937,10 @@ static long vop_ioctl(struct file *f, unsigned int cmd, unsigned long arg) dd.num_vq > MIC_MAX_VRINGS) return -EINVAL; - dd_config = kzalloc(mic_desc_size(&dd), GFP_KERNEL); - if (!dd_config) - return -ENOMEM; - if (copy_from_user(dd_config, argp, mic_desc_size(&dd))) { - ret = -EFAULT; - goto free_ret; - } + dd_config = memdup_user(argp, mic_desc_size(&dd)); + if (IS_ERR(dd_config)) + return PTR_ERR(dd_config); + /* Ensure desc has not changed between the two reads */ if (memcmp(&dd, dd_config, sizeof(dd))) { ret = -EINVAL; @@ -995,15 +992,11 @@ _unlock_ret: ret = vop_vdev_inited(vdev); if (ret) goto __unlock_ret; - buf = kzalloc(vdev->dd->config_len, GFP_KERNEL); - if (!buf) { - ret = -ENOMEM; + buf = memdup_user(argp, vdev->dd->config_len); + if (IS_ERR(buf)) { + ret = PTR_ERR(buf); goto __unlock_ret; } - if (copy_from_user(buf, argp, vdev->dd->config_len)) { - ret = -EFAULT; - goto done; - } ret = vop_virtio_config_change(vdev, buf); done: kfree(buf); |