AuxXxilium/linux_dsm_epyc7002
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mei: mei_write correct checks for copy_from_user

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1. return -EFUALT when copy_from_user fails
2. display error message on failure in error level

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin 2013-09-02 03:11:02 +03:00 committed by Greg Kroah-Hartman
parent 23f5a32206
commit d8b29efa27
1 changed files with 5 additions and 2 deletions
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7
drivers/misc/mei/main.c
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@ -404,8 +404,11 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
goto out;
rets = copy_from_user(write_cb->request_buffer.data, ubuf, length);
if (rets)
if (rets) {
dev_err(&dev->pdev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
goto out;
}
if (cl == &dev->iamthif_cl) {
rets = mei_amthif_write(dev, write_cb);
@ -567,7 +570,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
dev_dbg(&dev->pdev->dev, "copy connect data from user\n");
if (copy_from_user(connect_data, (char __user *)data,
sizeof(struct mei_connect_client_data))) {
dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n");
dev_err(&dev->pdev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
goto out;
}