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Linux v4.13.2

This commit is contained in:
Laura Abbott 2017-09-14 09:51:11 -07:00
parent 1cea4bfbc9
commit 2ce98a266d
3 changed files with 5 additions and 362 deletions
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357
bluetooth-properly-check-l2cap-config-option-output-buffer-length.patch
View File

@ -1,357 +0,0 @@
From e860d2c904d1a9f38a24eb44c9f34b8f915a6ea3 Mon Sep 17 00:00:00 2001
From: Ben Seri <ben@armis.com>
Date: Sat, 9 Sep 2017 23:15:59 +0200
Subject: Bluetooth: Properly check L2CAP config option output buffer length
From: Ben Seri <ben@armis.com>
commit e860d2c904d1a9f38a24eb44c9f34b8f915a6ea3 upstream.
Validate the output buffer length for L2CAP config requests and responses
to avoid overflowing the stack buffer used for building the option blocks.
Signed-off-by: Ben Seri <ben@armis.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/bluetooth/l2cap_core.c | 80 ++++++++++++++++++++++++---------------------
1 file changed, 43 insertions(+), 37 deletions(-)
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -58,7 +58,7 @@ static struct sk_buff *l2cap_build_cmd(s
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,
@@ -1473,7 +1473,7 @@ static void l2cap_conn_start(struct l2ca
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++;
}
@@ -2987,12 +2987,15 @@ static inline int l2cap_get_conf_opt(voi
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;
@@ -3017,7 +3020,7 @@ static void l2cap_add_conf_opt(void **pt
*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;
@@ -3045,7 +3048,7 @@ static void l2cap_add_opt_efs(void **ptr
}
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)
@@ -3191,11 +3194,12 @@ static inline void l2cap_txwin_setup(str
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);
@@ -3220,7 +3224,7 @@ static int l2cap_build_conf_req(struct l
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:
@@ -3239,7 +3243,7 @@ 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:
@@ -3259,21 +3263,21 @@ 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;
@@ -3291,17 +3295,17 @@ 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;
}
@@ -3312,10 +3316,11 @@ 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;
@@ -3417,7 +3422,7 @@ 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) {
@@ -3430,7 +3435,7 @@ 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 &&
@@ -3444,7 +3449,7 @@ 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;
@@ -3477,7 +3482,7 @@ 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;
@@ -3491,7 +3496,7 @@ 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;
@@ -3505,7 +3510,7 @@ 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;
@@ -3527,10 +3532,11 @@ 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 };
@@ -3548,13 +3554,13 @@ static int l2cap_parse_conf_rsp(struct l
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:
@@ -3568,13 +3574,13 @@ static int l2cap_parse_conf_rsp(struct l
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:
@@ -3587,7 +3593,7 @@ static int l2cap_parse_conf_rsp(struct l
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:
@@ -3692,7 +3698,7 @@ void __l2cap_connect_rsp_defer(struct l2
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++;
}
@@ -3900,7 +3906,7 @@ 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++;
}
@@ -3978,7 +3984,7 @@ static int l2cap_connect_create_rsp(stru
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;
@@ -4090,7 +4096,7 @@ static inline int l2cap_config_req(struc
}
/* 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;
@@ -4124,7 +4130,7 @@ static inline int l2cap_config_req(struc
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++;
}
@@ -4184,7 +4190,7 @@ static inline int l2cap_config_rsp(struc
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;
@@ -4214,7 +4220,7 @@ static inline int l2cap_config_rsp(struc
/* 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;
@@ -4791,7 +4797,7 @@ static void l2cap_do_create(struct l2cap
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++;
}
}
@@ -7465,7 +7471,7 @@ static void l2cap_security_cfm(struct hc
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++;
}

8
kernel.spec
View File

@ -54,7 +54,7 @@ Summary: The Linux kernel
%if 0%{?released_kernel}
# Do we have a -stable update to apply?
%define stable_update 1
%define stable_update 2
# Set rpm version accordingly
%if 0%{?stable_update}
%define stablerev %{stable_update}
@ -652,9 +652,6 @@ Patch620: kvm-nVMX-Don-t-allow-L2-to-access-the-hardware-CR8.patch
# CVE-2017-12153 rhbz 1491046 1491057
Patch621: nl80211-check-for-the-required-netlink-attributes-presence.patch
# CVE-2017-1000251 rhbz 1489716 1490906
Patch622: bluetooth-properly-check-l2cap-config-option-output-buffer-length.patch
# END OF PATCH DEFINITIONS
%endif
@ -2228,6 +2225,9 @@ fi
#
#
%changelog
* Thu Sep 14 2017 Laura Abbott <labbott@redhat.com> - 4.13.2-200
- Linux v4.13.2
* Wed Sep 13 2017 Justin M. Forbes <jforbes@fedoraproject.org>
- Fix CVE-2017-12154 (rhbz 1491224 1491231)
- Fix CVE-2017-12153 (rhbz 1491046 1491057)

2
sources
View File

@ -1,3 +1,3 @@
SHA512 (linux-4.13.tar.xz) = a557c2f0303ae618910b7106ff63d9978afddf470f03cb72aa748213e099a0ecd5f3119aea6cbd7b61df30ca6ef3ec57044d524b7babbaabddf8b08b8bafa7d2
SHA512 (perf-man-4.13.tar.gz) = 9bcc2cd8e56ec583ed2d8e0b0c88e7a94035a1915e40b3177bb02d6c0f10ddd4df9b097b1f5af59efc624226b613e240ddba8ddc2156f3682f992d5455fc5c03
SHA512 (patch-4.13.1.xz) = 392ba115d4728730d73e3c66e07f0230894f44ae71851c26ec9707d5f26bc093a6f7043592232deddf2619d2c7d305e62b168b52a142c59f10970f22bf3fbe7e
SHA512 (patch-4.13.2.xz) = 2b9cc6f24c2792b619189c81d8960d6f5dd622f767d6645208c59f3f38c00db5bdfb0d1fbbfa717bea7fd86067921cf07109c9a7a1001ce7a915bfa2a6a2c03e