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Merge "usb: gadget: ffs: Use local copy of descriptors for userspace copy"

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qctecmdr 2019-12-05 21:07:37 -08:00 • committed by Gerrit - the friendly Code Review server
commit 7531776c2b
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/gadget/function/f_fs.c
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@ -1324,7 +1324,7 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
case FUNCTIONFS_ENDPOINT_DESC:
{
int desc_idx;
struct usb_endpoint_descriptor *desc;
struct usb_endpoint_descriptor desc1, *desc;
switch (epfile->ffs->gadget->speed) {
case USB_SPEED_SUPER:
@ -1336,10 +1336,12 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
default:
desc_idx = 0;
}
desc = epfile->ep->descs[desc_idx];
memcpy(&desc1, desc, desc->bLength);
spin_unlock_irq(&epfile->ffs->eps_lock);
ret = copy_to_user((void __user *)value, desc, desc->bLength);
ret = copy_to_user((void __user *)value, &desc1, desc1.bLength);
if (ret)
ret = -EFAULT;
return ret;