Gustavo F. Padovan e454c84464 Bluetooth: Fix deadlock in the ERTM logic ... The Enhanced Retransmission Mode(ERTM) is a realiable mode of operation of the Bluetooth L2CAP layer. Think on it like a simplified version of TCP. The problem we were facing here was a deadlock. ERTM uses a backlog queue to queue incomimg packets while the user is helding the lock. At some moment the sk_sndbuf can be exceeded and we can't alloc new skbs then the code sleep with the lock to wait for memory, that stalls the ERTM connection once we can't read the acknowledgements packets in the backlog queue to free memory and make the allocation of outcoming skb successful. This patch actually affect all users of bt_skb_send_alloc(), i.e., all L2CAP modes and SCO. We are safe against socket states changes or channels deletion while the we are sleeping wait memory. Checking for the sk->sk_err and sk->sk_shutdown make the code safe, since any action that can leave the socket or the channel in a not usable state set one of the struct members at least. Then we can check both of them when getting the lock again and return with the proper error if something unexpected happens. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Ulisses Furquim <ulisses@profusion.mobi>		2010-09-30 12:19:35 -03:00
..
9p	net/9p: Implement TXATTRCREATE 9p call	2010-08-02 14:28:34 -05:00
bluetooth	Bluetooth: Fix deadlock in the ERTM logic	2010-09-30 12:19:35 -03:00
caif	caif-driver: Add CAIF-SPI Protocol driver.	2010-06-29 00:08:21 -07:00
irda	irda: Use __packed annotation instead IRDA_PACKED macro	2010-07-21 14:44:29 -07:00
iucv	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
netfilter	netfilter: nf_nat: make unique_tuple return void	2010-08-02 17:20:54 +02:00
netns	ipv6: ip6mr: support multiple tables	2010-05-11 14:40:55 +02:00
phonet	phonet: use call_rcu for phonet device free	2010-06-09 16:14:25 -07:00
sctp	net: use __packed annotation	2010-06-03 03:21:52 -07:00
tc_act	net sched: fix race in mirred device removal	2010-07-24 21:04:20 -07:00
tipc	tipc: Update commenting in TIPC API	2010-05-12 23:02:23 -07:00
act_api.h	pkt_sched: gen_kill_estimator() rcu fixes	2010-06-11 18:37:08 -07:00
addrconf.h	ipv6: add a missing unregister_pernet_subsys call	2010-09-26 19:09:25 -07:00
af_ieee802154.h	af_ieee802154: add support for WANT_ACK socket option	2009-08-12 21:54:50 -07:00
af_rxrpc.h	…
af_unix.h	af_unix: Allow credentials to work across user and pid namespaces.	2010-06-16 14:58:16 -07:00
ah.h	net: cleanup include/net	2009-11-04 05:06:25 -08:00
arp.h	net: make neigh_ops constant	2009-09-01 17:40:57 -07:00
atmclip.h	clip: convert to internal network_device_stats	2009-01-21 14:01:59 -08:00
ax25.h	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
ax88796.h	ax88796: Add method to take MAC from platform data	2009-03-24 23:32:03 -07:00
cfg80211.h	cfg80211: fix dev <-> wiphy typo	2010-07-29 12:55:00 -04:00
checksum.h	include/net net/ - csum_partial - remove unnecessary casts	2008-11-19 15:44:53 -08:00
cipso_ipv4.h	netlabel: Label incoming TCP connections correctly in SELinux	2009-03-28 15:01:36 +11:00
cls_cgroup.h	cls_cgroup: Fix rcu lockdep warning	2010-09-03 09:55:24 -07:00
compat.h	net: fix compat_sys_recvmmsg parameter type	2009-12-11 15:07:56 -08:00
datalink.h	…
dcbnl.h	dcbnl: Add support for setapp/getapp to netdev dcbnl_rtnl_ops	2009-09-01 01:24:30 -07:00
dn.h	decnet: compile fix for removal of byteorder wrapper	2008-11-27 23:04:13 -08:00
dn_dev.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
dn_fib.h	decnet: Remove unused FIB metric macros.	2010-03-27 19:23:46 -07:00
dn_neigh.h	…
dn_nsp.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
dn_route.h	net-next: remove useless union keyword	2010-06-10 23:31:35 -07:00
dsa.h	dsa: add switch chip cascading support	2009-03-21 19:06:54 -07:00
dsfield.h	…
dst.h	net: reset skb queue mapping when rx'ing over tunnel	2010-09-26 18:48:40 -07:00
dst_ops.h	netns: embed ip6_dst_ops directly	2009-09-01 17:40:31 -07:00
esp.h	…
ethoc.h	net: Add support for the OpenCores 10/100 Mbps Ethernet MAC.	2009-03-27 00:16:21 -07:00
fib_rules.h	net: fib_rules: mark arguments to fib_rules_register const and __net_initdata	2010-04-26 16:02:04 +02:00
flow.h	flow: virtualize flow cache entry methods	2010-04-07 03:43:18 -07:00
garp.h	…
gen_stats.h	net: cleanup include/net	2009-11-04 05:06:25 -08:00
genetlink.h	net: CONFIG_NET_NS reduction	2010-06-02 05:16:23 -07:00
icmp.h	ipv4: raw: move struct raw_sock and raw_sk() to include/net/raw.h	2010-04-13 14:49:31 -07:00
ieee80211_radiotap.h	wireless: update radiotap parser	2010-02-08 16:50:53 -05:00
ieee802154.h	ieee802154: move headers out of extra directory	2009-07-23 17:08:51 +04:00
ieee802154_netdev.h	ieee802154: add an mlme_ops call to retrieve PHY object	2009-11-06 14:32:18 +03:00
if_inet6.h	ipv6: Replace inet6_ifaddr->dead with state	2010-05-18 15:36:06 -07:00
inet6_connection_sock.h	net: replace ipfragok with skb->local_df	2010-04-15 23:36:37 -07:00
inet6_hashtables.h	tcp: Fix a connect() race with timewait sockets	2009-12-08 20:17:51 -08:00
inet_common.h	inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet_sendpage()	2010-07-12 20:21:46 -07:00
inet_connection_sock.h	net: replace ipfragok with skb->local_df	2010-04-15 23:36:37 -07:00
inet_ecn.h	net: replace __constant_{endian} uses in net headers	2009-02-14 22:58:35 -08:00
inet_frag.h	fragment: add fast path for in-order fragments	2010-06-30 13:44:29 -07:00
inet_hashtables.h	tcp: Fix a connect() race with timewait sockets	2009-12-08 20:17:51 -08:00
inet_sock.h	net - IP_NODEFRAG option for IPv4 socket	2010-06-23 13:16:38 -07:00
inet_timewait_sock.h	net: suppress RCU lockdep false positive in twsk_net()	2010-04-27 12:39:01 -07:00
inetpeer.h	inetpeer: restore small inet_peer structures	2010-06-16 11:55:39 -07:00
ip.h	snmp: 64bit ipstats_mib for all arches	2010-06-30 13:31:19 -07:00
ip6_checksum.h	…
ip6_fib.h	net-next: remove useless union keyword	2010-06-10 23:31:35 -07:00
ip6_route.h	net: sk_dst_cache RCUification	2010-04-13 01:41:33 -07:00
ip6_tunnel.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
ip_fib.h	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2009-11-06 00:55:55 -08:00
ip_vs.h	ipvs: fix active FTP	2010-09-08 10:39:57 -07:00
ipcomp.h	percpu: add __percpu sparse annotations to net	2010-02-16 23:05:38 -08:00
ipconfig.h	…
ipip.h	net-next: remove useless union keyword	2010-06-10 23:31:35 -07:00
ipv6.h	snmp: 64bit ipstats_mib for all arches	2010-06-30 13:31:19 -07:00
ipx.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
iw_handler.h	include/net/iw_handler.h: Use SIOCIWFIRST not SIOCSIWCOMMIT in comment	2010-03-31 14:49:12 -04:00
lapb.h	…
lib80211.h	lib80211: remove unused host_build_iv option	2010-07-26 15:09:04 -04:00
llc.h	llc: convert llc_sap_list to RCU	2009-12-26 20:46:28 -08:00
llc_c_ac.h	…
llc_c_ev.h	…
llc_c_st.h	…
llc_conn.h	llc: use a device based hash table to speed up multicast delivery	2009-12-26 20:43:57 -08:00
llc_if.h	…
llc_pdu.h	…
llc_s_ac.h	…
llc_s_ev.h	…
llc_s_st.h	…
llc_sap.h	…
mac80211.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem	2010-07-29 14:47:07 -04:00
mip6.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
mld.h	ipv6 mcast: Introduce include/net/mld.h for MLD definitions.	2010-04-23 13:35:55 +09:00
ndisc.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
neighbour.h	net/neighbour.h: fix typo	2010-06-30 12:06:52 -07:00
net_namespace.h	nsproxy: remove INIT_NSPROXY()	2010-03-12 15:52:40 -08:00
netdma.h	net_dma: convert to dma_find_channel	2009-01-06 11:38:15 -07:00
netevent.h	…
netlabel.h	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
netlink.h	net: Fix a typo in netlink.h	2010-06-23 12:58:40 -07:00
netrom.h	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
nexthop.h	…
nl802154.h	ieee802154: add support for channel pages from IEEE 802.15.4-2006	2009-08-19 23:08:22 +04:00
p8022.h	…
pkt_cls.h	net: rename skb->iif to skb->skb_iif	2009-11-20 15:35:04 -08:00
pkt_sched.h	net: Define accessors to manipulate QDISC_STATE_RUNNING	2010-06-02 03:23:51 -07:00
protocol.h	net: drop capability from protocol definitions	2009-11-05 21:40:17 -08:00
psnap.h	snap: use const for descriptor	2009-03-21 19:06:50 -07:00
raw.h	ipv4: ipmr: support multiple tables	2010-04-13 14:49:34 -07:00
rawv6.h	ipv6: Use correct data types for ICMPv6 type and code	2009-06-23 04:31:07 -07:00
red.h	net: cleanup include/net	2009-11-04 05:06:25 -08:00
regulatory.h	wireless: only use alpha2 regulatory information from country IE	2010-07-20 16:44:35 -04:00
request_sock.h	tcp: account SYN-ACK timeouts & retransmissions	2010-01-17 19:09:39 -08:00
rose.h	NET: ROSE: Don't use static buffer.	2009-07-26 19:11:14 -07:00
route.h	tproxy: check for transparent flag in ip_route_newports	2010-09-27 15:03:33 -07:00
rtnetlink.h	rtnetlink: support specifying device flags on device creation	2010-02-27 02:43:40 -08:00
sch_generic.h	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2010-07-07 15:59:38 -07:00
scm.h	scm: Capture the full credentials of the scm sender.	2010-06-16 14:55:56 -07:00
slhc_vj.h	…
snmp.h	snmp: 64bit ipstats_mib for all arches	2010-06-30 13:31:19 -07:00
sock.h	udp: add rehash on connect()	2010-09-08 21:45:01 -07:00
stp.h	…
tcp.h	tcp: Prevent overzealous packetization by SWS logic.	2010-09-15 12:01:44 -07:00
tcp_states.h	…
timewait_sock.h	net: Fix memory leak in the proto_register function	2008-11-21 16:45:22 -08:00
transp_v6.h	IPv6: Add dontfrag argument to relevant functions	2010-04-23 23:35:28 -07:00
udp.h	udp: add rehash on connect()	2010-09-08 21:45:01 -07:00
udplite.h	udp: introduce struct udp_table and multiple spinlocks	2008-10-29 01:41:45 -07:00
wext.h	wext: refactor	2009-10-07 16:39:43 -04:00
wimax.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
wpan-phy.h	ieee802154: add support for creation/removal of logic interfaces	2009-11-06 14:32:24 +03:00
x25.h	X25: Move accept approve flag to bitfield	2010-05-17 17:39:27 -07:00
x25device.h	X25: Add if_x25.h and x25 to device identifiers	2010-04-22 16:12:36 -07:00
xfrm.h	xfrm: Allow different selector family in temporary state	2010-09-20 11:11:38 -07:00