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authorTakashi Iwai <tiwai@suse.de>2017-09-12 22:21:00 +0200
committerTakashi Iwai <tiwai@suse.de>2017-09-12 22:30:09 +0200
commitf915c2c6b0cf96c45353bfcfb0b9091d748a1ca5 (patch)
tree78ebbcb914fd02fbb686acc083418b5c7f78ea8d
parentdb99418328a0cea64720ed88b1303fc2f42a7ea6 (diff)
parent491cc8f579039a02a16ed0bad6a4a40c55106805 (diff)
Merge branch 'SLE12-SP2-fastpath' into SLE12-SP3rpm-4.4.82-6.6
Conflicts: series.conf suse-commit: 05d8b028da084fa9a2be00bcb2cfdf049401e748
-rw-r--r--net/bluetooth/l2cap_core.c99
1 files changed, 62 insertions, 37 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 66e8b6ee19a5..ec8879bf4f2f 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -57,7 +57,8 @@ static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
u8 code, u8 ident, u16 dlen, void *data);
static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
void *data);
-static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data);
+static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data,
+ size_t data_size);
static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err);
static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
@@ -1462,7 +1463,9 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
set_bit(CONF_REQ_SENT, &chan->conf_state);
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
- l2cap_build_conf_req(chan, buf), buf);
+ l2cap_build_conf_req(chan, buf,
+ sizeof(buf)),
+ buf);
chan->num_conf_req++;
}
@@ -2966,12 +2969,16 @@ static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen,
return len;
}
-static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
+static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val,
+ size_t size)
{
struct l2cap_conf_opt *opt = *ptr;
BT_DBG("type 0x%2.2x len %u val 0x%lx", type, len, val);
+ if (size < L2CAP_CONF_OPT_SIZE + len)
+ return;
+
opt->type = type;
opt->len = len;
@@ -2996,7 +3003,7 @@ static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
*ptr += L2CAP_CONF_OPT_SIZE + len;
}
-static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan)
+static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan, size_t size)
{
struct l2cap_conf_efs efs;
@@ -3024,7 +3031,7 @@ static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan)
}
l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs),
- (unsigned long) &efs);
+ (unsigned long) &efs, size);
}
static void l2cap_ack_timeout(struct work_struct *work)
@@ -3170,11 +3177,13 @@ static inline void l2cap_txwin_setup(struct l2cap_chan *chan)
chan->ack_win = chan->tx_win;
}
-static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data)
+static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data,
+ size_t data_size)
{
struct l2cap_conf_req *req = data;
struct l2cap_conf_rfc rfc = { .mode = chan->mode };
void *ptr = req->data;
+ void *endptr = data + data_size;
u16 size;
BT_DBG("chan %p", chan);
@@ -3199,7 +3208,8 @@ static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data)
done:
if (chan->imtu != L2CAP_DEFAULT_MTU)
- l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu);
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu,
+ endptr - ptr);
switch (chan->mode) {
case L2CAP_MODE_BASIC:
@@ -3218,7 +3228,7 @@ done:
rfc.max_pdu_size = 0;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
- (unsigned long) &rfc);
+ (unsigned long) &rfc, endptr - ptr);
break;
case L2CAP_MODE_ERTM:
@@ -3238,21 +3248,21 @@ done:
L2CAP_DEFAULT_TX_WINDOW);
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
- (unsigned long) &rfc);
+ (unsigned long) &rfc, endptr - ptr);
if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
- l2cap_add_opt_efs(&ptr, chan);
+ l2cap_add_opt_efs(&ptr, chan, endptr - ptr);
if (test_bit(FLAG_EXT_CTRL, &chan->flags))
l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
- chan->tx_win);
+ chan->tx_win, endptr - ptr);
if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
if (chan->fcs == L2CAP_FCS_NONE ||
test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
chan->fcs = L2CAP_FCS_NONE;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
- chan->fcs);
+ chan->fcs, endptr - ptr);
}
break;
@@ -3270,17 +3280,17 @@ done:
rfc.max_pdu_size = cpu_to_le16(size);
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
- (unsigned long) &rfc);
+ (unsigned long) &rfc, endptr - ptr);
if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
- l2cap_add_opt_efs(&ptr, chan);
+ l2cap_add_opt_efs(&ptr, chan, endptr - ptr);
if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
if (chan->fcs == L2CAP_FCS_NONE ||
test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
chan->fcs = L2CAP_FCS_NONE;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
- chan->fcs);
+ chan->fcs, endptr - ptr);
}
break;
}
@@ -3291,10 +3301,12 @@ done:
return ptr - data;
}
-static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data)
+static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data,
+ size_t data_size)
{
struct l2cap_conf_rsp *rsp = data;
void *ptr = rsp->data;
+ void *endptr = data + data_size;
void *req = chan->conf_req;
int len = chan->conf_len;
int type, hint, olen;
@@ -3396,7 +3408,7 @@ done:
return -ECONNREFUSED;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
- (unsigned long) &rfc);
+ (unsigned long) &rfc, endptr - ptr);
}
if (result == L2CAP_CONF_SUCCESS) {
@@ -3409,7 +3421,8 @@ done:
chan->omtu = mtu;
set_bit(CONF_MTU_DONE, &chan->conf_state);
}
- l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu);
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu,
+ endptr - ptr);
if (remote_efs) {
if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
@@ -3423,7 +3436,8 @@ done:
l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
sizeof(efs),
- (unsigned long) &efs);
+ (unsigned long) &efs,
+ endptr - ptr);
} else {
/* Send PENDING Conf Rsp */
result = L2CAP_CONF_PENDING;
@@ -3456,7 +3470,8 @@ done:
set_bit(CONF_MODE_DONE, &chan->conf_state);
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
- sizeof(rfc), (unsigned long) &rfc);
+ sizeof(rfc), (unsigned long) &rfc,
+ endptr - ptr);
if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
chan->remote_id = efs.id;
@@ -3470,7 +3485,8 @@ done:
le32_to_cpu(efs.sdu_itime);
l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
sizeof(efs),
- (unsigned long) &efs);
+ (unsigned long) &efs,
+ endptr - ptr);
}
break;
@@ -3484,7 +3500,7 @@ done:
set_bit(CONF_MODE_DONE, &chan->conf_state);
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
- (unsigned long) &rfc);
+ (unsigned long) &rfc, endptr - ptr);
break;
@@ -3506,10 +3522,11 @@ done:
}
static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
- void *data, u16 *result)
+ void *data, size_t size, u16 *result)
{
struct l2cap_conf_req *req = data;
void *ptr = req->data;
+ void *endptr = data + size;
int type, olen;
unsigned long val;
struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
@@ -3527,13 +3544,14 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
chan->imtu = L2CAP_DEFAULT_MIN_MTU;
} else
chan->imtu = val;
- l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu);
+ l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu,
+ endptr - ptr);
break;
case L2CAP_CONF_FLUSH_TO:
chan->flush_to = val;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
- 2, chan->flush_to);
+ 2, chan->flush_to, endptr - ptr);
break;
case L2CAP_CONF_RFC:
@@ -3547,13 +3565,14 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
chan->fcs = 0;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
- sizeof(rfc), (unsigned long) &rfc);
+ sizeof(rfc), (unsigned long) &rfc,
+ endptr - ptr);
break;
case L2CAP_CONF_EWS:
chan->ack_win = min_t(u16, val, chan->ack_win);
l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
- chan->tx_win);
+ chan->tx_win, endptr - ptr);
break;
case L2CAP_CONF_EFS:
@@ -3566,7 +3585,7 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
return -ECONNREFUSED;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
- (unsigned long) &efs);
+ (unsigned long) &efs, endptr - ptr);
break;
case L2CAP_CONF_FCS:
@@ -3671,7 +3690,7 @@ void __l2cap_connect_rsp_defer(struct l2cap_chan *chan)
return;
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
- l2cap_build_conf_req(chan, buf), buf);
+ l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
chan->num_conf_req++;
}
@@ -3879,7 +3898,8 @@ sendresp:
u8 buf[128];
set_bit(CONF_REQ_SENT, &chan->conf_state);
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
- l2cap_build_conf_req(chan, buf), buf);
+ l2cap_build_conf_req(chan, buf, sizeof(buf)),
+ buf);
chan->num_conf_req++;
}
@@ -3957,7 +3977,8 @@ static int l2cap_connect_create_rsp(struct l2cap_conn *conn,
break;
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
- l2cap_build_conf_req(chan, req), req);
+ l2cap_build_conf_req(chan, req, sizeof(req)),
+ req);
chan->num_conf_req++;
break;
@@ -4069,7 +4090,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn,
}
/* Complete config. */
- len = l2cap_parse_conf_req(chan, rsp);
+ len = l2cap_parse_conf_req(chan, rsp, sizeof(rsp));
if (len < 0) {
l2cap_send_disconn_req(chan, ECONNRESET);
goto unlock;
@@ -4103,7 +4124,8 @@ static inline int l2cap_config_req(struct l2cap_conn *conn,
if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) {
u8 buf[64];
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
- l2cap_build_conf_req(chan, buf), buf);
+ l2cap_build_conf_req(chan, buf, sizeof(buf)),
+ buf);
chan->num_conf_req++;
}
@@ -4163,7 +4185,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn,
char buf[64];
len = l2cap_parse_conf_rsp(chan, rsp->data, len,
- buf, &result);
+ buf, sizeof(buf), &result);
if (len < 0) {
l2cap_send_disconn_req(chan, ECONNRESET);
goto done;
@@ -4193,7 +4215,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn,
/* throw out any old stored conf requests */
result = L2CAP_CONF_SUCCESS;
len = l2cap_parse_conf_rsp(chan, rsp->data, len,
- req, &result);
+ req, sizeof(req), &result);
if (len < 0) {
l2cap_send_disconn_req(chan, ECONNRESET);
goto done;
@@ -4770,7 +4792,9 @@ static void l2cap_do_create(struct l2cap_chan *chan, int result,
set_bit(CONF_REQ_SENT, &chan->conf_state);
l2cap_send_cmd(chan->conn, l2cap_get_ident(chan->conn),
L2CAP_CONF_REQ,
- l2cap_build_conf_req(chan, buf), buf);
+ l2cap_build_conf_req(chan, buf,
+ sizeof(buf)),
+ buf);
chan->num_conf_req++;
}
}
@@ -7442,7 +7466,8 @@ static void l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
set_bit(CONF_REQ_SENT, &chan->conf_state);
l2cap_send_cmd(conn, l2cap_get_ident(conn),
L2CAP_CONF_REQ,
- l2cap_build_conf_req(chan, buf),
+ l2cap_build_conf_req(chan, buf,
+ sizeof(buf)),
buf);
chan->num_conf_req++;
}