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usb: gadger: f_fs: Do not copy past descriptor end. 

Endpoint descriptors come in 2 sizes, struct usb_endpoint_descriptor being
the largest. Use bLength to stop on endpoint descriptor boundary, and not
2 bytes too far.

Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Vincent Pelletier 2017-01-17 13:20:11 +00:00 committed by Felipe Balbi
parent a98feef743
commit f199a80cfe
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/gadget/function/f_fs.c
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@ -1230,7 +1230,7 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
desc = epfile->ep->descs[desc_idx];
spin_unlock_irq(&epfile->ffs->eps_lock);
ret = copy_to_user((void *)value, desc, sizeof(*desc));
ret = copy_to_user((void *)value, desc, desc->bLength);
if (ret)
ret = -EFAULT;
return ret;