diff options
| author | Suren Baghdasaryan <surenb@google.com> | 2018-09-17 15:51:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-29 03:06:01 -0700 |
| commit | 6ead7a8a4ec1c69c39951d96ba397010c7d14e26 (patch) | |
| tree | a18dec3ab279f40e561b21fc451f69e3bd492fa4 /include/net/datalink.h | |
| parent | 4a16b3cd084df928ae2b19cf9cf61c406de8a80d (diff) | |
NFC: Fix the number of pipes
commit e285d5bfb7e9785d289663baef252dd315e171f8 upstream.
According to ETSI TS 102 622 specification chapter 4.4 pipe identifier
is 7 bits long which allows for 128 unique pipe IDs. Because
NFC_HCI_MAX_PIPES is used as the number of pipes supported and not
as the max pipe ID, its value should be 128 instead of 127.
nfc_hci_recv_from_llc extracts pipe ID from packet header using
NFC_HCI_FRAGMENT(0x7F) mask which allows for pipe ID value of 127.
Same happens when NCI_HCP_MSG_GET_PIPE() is being used. With
pipes array having only 127 elements and pipe ID of 127 the OOB memory
access will result.
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Allen Pais <allen.pais@oracle.com>
Cc: "David S. Miller" <davem@davemloft.net>
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net/datalink.h')
0 files changed, 0 insertions, 0 deletions