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| author | Mark Greer <mgreer@animalcreek.com> | 2017-06-15 10:46:15 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2017-06-23 00:19:59 +0200 |
| commit | 7f9f171336baec8ec71d57b6d329bf8cea5c1562 (patch) | |
| tree | 563e5510daff423dfba53b060ea6a31b2ba07172 | |
| parent | dcfca27faf6d19d2af530cfccee2fcdbcd836a2c (diff) | |
| download | linux-7f9f171336baec8ec71d57b6d329bf8cea5c1562.tar.gz linux-7f9f171336baec8ec71d57b6d329bf8cea5c1562.tar.bz2 linux-7f9f171336baec8ec71d57b6d329bf8cea5c1562.zip | |
NFC: digital: NFC-A SEL_RES must be one byte
Section 4.8.2 (SEL_RES Response) of NFC Forum's NFC Digital Protocol
Technical Specification dated 2010-11-17 clearly states that the size
of a SEL_RES Response is one byte. Enforce this restriction in the
code.
Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
| -rw-r--r-- | net/nfc/digital_technology.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/nfc/digital_technology.c b/net/nfc/digital_technology.c index 3cc3448da524..2021d1d58a75 100644 --- a/net/nfc/digital_technology.c +++ b/net/nfc/digital_technology.c @@ -27,6 +27,7 @@ #define DIGITAL_SDD_RES_CT 0x88 #define DIGITAL_SDD_RES_LEN 5 +#define DIGITAL_SEL_RES_LEN 1 #define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04)) #define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60)) @@ -299,7 +300,7 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, } } - if (!resp->len) { + if (resp->len != DIGITAL_SEL_RES_LEN) { rc = -EIO; goto exit; } |