tree 3a872aa864aa69857307b9a952dd01494e4cf7af
parent 0eb82af7cd718652ed9e18c00352bed33c270ace
author Dan Carpenter <dan.carpenter@oracle.com> 1531312171 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1537943894 +0200

mei: bus: type promotion bug in mei_nfc_if_version()

commit b40b3e9358fbafff6a4ba0f4b9658f6617146f9c upstream.

We accidentally removed the check for negative returns
without considering the issue of type promotion.
The "if_version_length" variable is type size_t so if __mei_cl_recv()
returns a negative then "bytes_recv" is type promoted
to a high positive value and treated as success.

Cc: <stable@vger.kernel.org>
Fixes: 582ab27a063a ("mei: bus: fix received data size check in NFC fixup")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>