diff options
| author | Suren Baghdasaryan <[email protected]> | 2018-09-17 15:51:41 +0200 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2018-09-18 19:55:01 -0700 |
| commit | e285d5bfb7e9785d289663baef252dd315e171f8 (patch) | |
| tree | 34a020e4c916e80093e7bf95dca8c3f707861245 | |
| parent | 674d9de02aa7d521ebdf66c3958758bdd9c64e11 (diff) | |
NFC: Fix the number of pipes
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 <[email protected]>
Cc: Allen Pais <[email protected]>
Cc: "David S. Miller" <[email protected]>
Suggested-by: Dan Carpenter <[email protected]>
Signed-off-by: Suren Baghdasaryan <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
| -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]; |