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Howard Chung b7d0ca715c Bluetooth: L2CAP: handle l2cap config request during open state 
[ Upstream commit 96298f640104e4cd9a913a6e50b0b981829b94ff ]

According to Core Spec Version 5.2 | Vol 3, Part A 6.1.5,
the incoming L2CAP_ConfigReq should be handled during
OPEN state.

The section below shows the btmon trace when running
L2CAP/COS/CFD/BV-12-C before and after this change.

=== Before ===
...
> ACL Data RX: Handle 256 flags 0x02 dlen 12                
      L2CAP: Connection Request (0x02) ident 2 len 4
        PSM: 1 (0x0001)
        Source CID: 65
< ACL Data TX: Handle 256 flags 0x00 dlen 16                
      L2CAP: Connection Response (0x03) ident 2 len 8
        Destination CID: 64
        Source CID: 65
        Result: Connection successful (0x0000)
        Status: No further information available (0x0000)
< ACL Data TX: Handle 256 flags 0x00 dlen 12                
      L2CAP: Configure Request (0x04) ident 2 len 4
        Destination CID: 65
        Flags: 0x0000
> HCI Event: Number of Completed Packets (0x13) plen 5      
        Num handles: 1
        Handle: 256
        Count: 1
> HCI Event: Number of Completed Packets (0x13) plen 5      
        Num handles: 1
        Handle: 256
        Count: 1
> ACL Data RX: Handle 256 flags 0x02 dlen 16                
      L2CAP: Configure Request (0x04) ident 3 len 8
        Destination CID: 64
        Flags: 0x0000
        Option: Unknown (0x10) [hint]
        01 00                                            ..
< ACL Data TX: Handle 256 flags 0x00 dlen 18                
      L2CAP: Configure Response (0x05) ident 3 len 10
        Source CID: 65
        Flags: 0x0000
        Result: Success (0x0000)
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 672
> HCI Event: Number of Completed Packets (0x13) plen 5      
        Num handles: 1
        Handle: 256
        Count: 1
> ACL Data RX: Handle 256 flags 0x02 dlen 14                
      L2CAP: Configure Response (0x05) ident 2 len 6
        Source CID: 64
        Flags: 0x0000
        Result: Success (0x0000)
> ACL Data RX: Handle 256 flags 0x02 dlen 20                
      L2CAP: Configure Request (0x04) ident 3 len 12
        Destination CID: 64
        Flags: 0x0000
        Option: Unknown (0x10) [hint]
        01 00 91 02 11 11                                ......
< ACL Data TX: Handle 256 flags 0x00 dlen 14                
      L2CAP: Command Reject (0x01) ident 3 len 6
        Reason: Invalid CID in request (0x0002)
        Destination CID: 64
        Source CID: 65
> HCI Event: Number of Completed Packets (0x13) plen 5      
        Num handles: 1
        Handle: 256
        Count: 1
...
=== After ===
...
> ACL Data RX: Handle 256 flags 0x02 dlen 12               
      L2CAP: Connection Request (0x02) ident 2 len 4
        PSM: 1 (0x0001)
        Source CID: 65
< ACL Data TX: Handle 256 flags 0x00 dlen 16               
      L2CAP: Connection Response (0x03) ident 2 len 8
        Destination CID: 64
        Source CID: 65
        Result: Connection successful (0x0000)
        Status: No further information available (0x0000)
< ACL Data TX: Handle 256 flags 0x00 dlen 12               
      L2CAP: Configure Request (0x04) ident 2 len 4
        Destination CID: 65
        Flags: 0x0000
> HCI Event: Number of Completed Packets (0x13) plen 5     
        Num handles: 1
        Handle: 256
        Count: 1
> HCI Event: Number of Completed Packets (0x13) plen 5     
        Num handles: 1
        Handle: 256
        Count: 1
> ACL Data RX: Handle 256 flags 0x02 dlen 16               
      L2CAP: Configure Request (0x04) ident 3 len 8
        Destination CID: 64
        Flags: 0x0000
        Option: Unknown (0x10) [hint]
        01 00                                            ..
< ACL Data TX: Handle 256 flags 0x00 dlen 18               
      L2CAP: Configure Response (0x05) ident 3 len 10
        Source CID: 65
        Flags: 0x0000
        Result: Success (0x0000)
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 672
> HCI Event: Number of Completed Packets (0x13) plen 5     
        Num handles: 1
        Handle: 256
        Count: 1
> ACL Data RX: Handle 256 flags 0x02 dlen 14               
      L2CAP: Configure Response (0x05) ident 2 len 6
        Source CID: 64
        Flags: 0x0000
        Result: Success (0x0000)
> ACL Data RX: Handle 256 flags 0x02 dlen 20               
      L2CAP: Configure Request (0x04) ident 3 len 12
        Destination CID: 64
        Flags: 0x0000
        Option: Unknown (0x10) [hint]
        01 00 91 02 11 11                                .....
< ACL Data TX: Handle 256 flags 0x00 dlen 18               
      L2CAP: Configure Response (0x05) ident 3 len 10
        Source CID: 65
        Flags: 0x0000
        Result: Success (0x0000)
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 672
< ACL Data TX: Handle 256 flags 0x00 dlen 12               
      L2CAP: Configure Request (0x04) ident 3 len 4
        Destination CID: 65
        Flags: 0x0000
> HCI Event: Number of Completed Packets (0x13) plen 5     
        Num handles: 1
        Handle: 256
        Count: 1
> HCI Event: Number of Completed Packets (0x13) plen 5     
        Num handles: 1
        Handle: 256
        Count: 1
...

Signed-off-by: Howard Chung <howardchung@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 20:40:09 +02:00
..
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…
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core
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2018-09-19 22:47:15 +02:00
dccp
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2020-05-20 08:15:30 +02:00
decnet
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2019-12-05 15:35:12 +01:00
dns_resolver
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2020-04-13 10:32:53 +02:00
ethernet
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ieee802154
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ipx
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irda
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2020-07-22 09:10:47 +02:00
l3mdev
…
lapb
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2019-06-22 08:17:22 +02:00
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2020-07-22 09:10:47 +02:00
mac80211
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2020-08-21 11:02:08 +02:00
mac802154
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2018-09-09 20:01:19 +02:00
mpls
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2020-05-20 08:15:30 +02:00
ncsi
…
netfilter
netfilter: nf_tables: fix destination register zeroing
2020-09-12 11:47:33 +02:00
netlabel
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2020-09-12 11:47:39 +02:00
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2020-07-22 09:10:48 +02:00
netrom
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2020-05-02 17:23:08 +02:00
nfc
net/nfc/rawsock.c: add CAP_NET_RAW check.
2020-08-21 11:02:04 +02:00
openvswitch
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2019-12-21 10:42:23 +01:00
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2020-01-29 10:24:35 +01:00
phonet
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2019-03-23 13:19:44 +01:00
qrtr
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2020-06-03 08:16:29 +02:00
rds
rds: Prevent kernel-infoleak in rds_notify_queue_get()
2020-08-21 11:01:49 +02:00
rfkill
rfkill: Fix incorrect check to avoid NULL pointer dereference
2020-01-12 11:24:23 +01:00
rose
net: rose: fix a possible stack overflow
2019-04-03 06:24:14 +02:00
rxrpc
rxrpc: Fix sendmsg() returning EPIPE due to recvmsg() returning ENODATA
2020-07-31 16:44:06 +02:00
sched
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2020-06-30 15:38:37 -04:00
sctp
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2020-09-12 11:47:40 +02:00
strparser
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2018-04-29 11:32:02 +02:00
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2020-09-23 08:46:14 +02:00
switchdev
…
tipc
tipc: use skb_unshare() instead in tipc_buf_append()
2020-10-01 20:40:00 +02:00
unix
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2020-10-01 20:40:06 +02:00
vmw_vsock
vsock: fix timeout in vsock_accept()
2020-06-11 09:22:21 +02:00
wimax
…
wireless
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2020-09-12 11:47:39 +02:00
x25
net/x25: Fix null-ptr-deref in x25_disconnect
2020-08-21 11:01:50 +02:00
xfrm
xfrm: fix a NULL-ptr deref in xfrm_local_error
2020-06-03 08:16:44 +02:00
compat.c
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2020-08-21 11:02:08 +02:00
Kconfig
…
Makefile
…
socket.c
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2020-08-21 11:02:04 +02:00
sysctl_net.c
…