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staging: lustre: obdclass: return -EFAULT if copy_from_user() fails

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The copy_from_user() function returns the number of bytes which we
weren't able to copy.  We don't want to return that to the user but
instead we want to return -EFAULT.

Fixes: d7e09d0397 ("staging: add Lustre file system client support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter
2017-08-26 09:04:18 +03:00
committed by Greg Kroah-Hartman
parent 3ca121c2f4
commit 092c3def24
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/lustre/lustre/obdclass/class_obd.c
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@@ -180,7 +180,8 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
err = -ENOMEM;
goto out;
}
err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
err = -EFAULT;
if (!err)
err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
if (!err)