Re: [PATCH] nfc: Ensure presence of required attributes in the deactivate_target handler

From: David Miller
Date: Fri Jun 14 2019 - 11:53:35 EST

From: Young Xiao <92siuyang@xxxxxxxxx>
Date: Fri, 14 Jun 2019 15:13:02 +0800

> Check that the NFC_ATTR_TARGET_INDEX attributes (in addition to
> NFC_ATTR_DEVICE_INDEX) are provided by the netlink client prior to
> accessing them. This prevents potential unhandled NULL pointer dereference
> exceptions which can be triggered by malicious user-mode programs,
> if they omit one or both of these attributes.
> Signed-off-by: Young Xiao <92siuyang@xxxxxxxxx>

Applied and queued up for -stable, thanks.