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| author | Suren Baghdasaryan <surenb@google.com> | 2018-09-17 15:51:41 +0200 |
|---|---|---|
| committer | Todd Kjos <tkjos@google.com> | 2018-11-02 16:16:47 -0700 |
| commit | 77d9403ba020a8c842953828721244bfa60a40eb (patch) | |
| tree | ecfd7a99d7b5c9b725b6e9339e771ff859e015f0 | |
| parent | a8af26acc2db4f3029a26a509c1f76ad42e0c322 (diff) | |
| download | common-77d9403ba020a8c842953828721244bfa60a40eb.tar.gz | |
NFC: Fix the number of pipesASB-2018-12-05_4.9-o-mr1ASB-2018-11-05_4.9-o-mr1
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>
| -rw-r--r-- | include/net/nfc/hci.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/nfc/hci.h b/include/net/nfc/hci.h index 316694dafa5b..008f466d1da7 100644 --- a/include/net/nfc/hci.h +++ b/include/net/nfc/hci.h @@ -87,7 +87,7 @@ struct nfc_hci_pipe { * According to specification 102 622 chapter 4.4 Pipes, * the pipe identifier is 7 bits long. */ -#define NFC_HCI_MAX_PIPES 127 +#define NFC_HCI_MAX_PIPES 128 struct nfc_hci_init_data { u8 gate_count; struct nfc_hci_gate gates[NFC_HCI_MAX_CUSTOM_GATES]; |