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2008-09-12[Bluetooth] Fix regression from using default link policyMarcel Holtmann
To speed up the Simple Pairing connection setup, the support for the default link policy has been enabled. This is in contrast to settings the link policy on every connection setup. Using the default link policy is the preferred way since there is no need to dynamically change it for every connection. For backward compatibility reason and to support old userspace the HCISETLINKPOL ioctl has been switched over to using hci_request() to issue the HCI command for setting the default link policy instead of just storing it in the HCI device structure. However the hci_request() can only be issued when the device is brought up. If used on a device that is registered, but still down it will timeout and fail. This is problematic since the command is put on the TX queue and the Bluetooth core tries to submit it to hardware that is not ready yet. The timeout for these requests is 10 seconds and this causes a significant regression when setting up a new device. The userspace can perfectly handle a failure of the HCISETLINKPOL ioctl and will re-submit it later, but the 10 seconds delay causes a problem. So in case hci_request() is called on a device that is still down, just fail it with ENETDOWN to indicate what happens. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2008-09-09ipv6: Fix OOPS in ip6_dst_lookup_tail().Neil Horman
This fixes kernel bugzilla 11469: "TUN with 1024 neighbours: ip6_dst_lookup_tail NULL crash" dst->neighbour is not necessarily hooked up at this point in the processing path, so blindly dereferencing it is the wrong thing to do. This NULL check exists in other similar paths and this case was just an oversight. Also fix the completely wrong and confusing indentation here while we're at it. Based upon a patch by Evgeniy Polyakov. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-09ipsec: Restore larval states and socket policies in dumpHerbert Xu
The commit commit 4c563f7669c10a12354b72b518c2287ffc6ebfb3 ("[XFRM]: Speed up xfrm_policy and xfrm_state walking") inadvertently removed larval states and socket policies from netlink dumps. This patch restores them. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-09Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/holtmann/bluetooth-2.6
2008-09-09[Bluetooth] Reject L2CAP connections on an insecure ACL linkMarcel Holtmann
The Security Mode 4 of the Bluetooth 2.1 specification has strict authentication and encryption requirements. It is the initiators job to create a secure ACL link. However in case of malicious devices, the acceptor has to make sure that the ACL is encrypted before allowing any kind of L2CAP connection. The only exception here is the PSM 1 for the service discovery protocol, because that is allowed to run on an insecure ACL link. Previously it was enough to reject a L2CAP connection during the connection setup phase, but with Bluetooth 2.1 it is forbidden to do any L2CAP protocol exchange on an insecure link (except SDP). The new hci_conn_check_link_mode() function can be used to check the integrity of an ACL link. This functions also takes care of the cases where Security Mode 4 is disabled or one of the devices is based on an older specification. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2008-09-09[Bluetooth] Enforce correct authentication requirementsMarcel Holtmann
With the introduction of Security Mode 4 and Simple Pairing from the Bluetooth 2.1 specification it became mandatory that the initiator requires authentication and encryption before any L2CAP channel can be established. The only exception here is PSM 1 for the service discovery protocol (SDP). It is meant to be used without any encryption since it contains only public information. This is how Bluetooth 2.0 and before handle connections on PSM 1. For Bluetooth 2.1 devices the pairing procedure differentiates between no bonding, general bonding and dedicated bonding. The L2CAP layer wrongly uses always general bonding when creating new connections, but it should not do this for SDP connections. In this case the authentication requirement should be no bonding and the just-works model should be used, but in case of non-SDP connection it is required to use general bonding. If the new connection requires man-in-the-middle (MITM) protection, it also first wrongly creates an unauthenticated link key and then later on requests an upgrade to an authenticated link key to provide full MITM protection. With Simple Pairing the link key generation is an expensive operation (compared to Bluetooth 2.0 and before) and doing this twice during a connection setup causes a noticeable delay when establishing a new connection. This should be avoided to not regress from the expected Bluetooth 2.0 connection times. The authentication requirements are known up-front and so enforce them. To fulfill these requirements the hci_connect() function has been extended with an authentication requirement parameter that will be stored inside the connection information and can be retrieved by userspace at any time. This allows the correct IO capabilities exchange and results in the expected behavior. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2008-09-09[Bluetooth] Fix reference counting during ACL config stageMarcel Holtmann
The ACL config stage keeps holding a reference count on incoming connections when requesting the extended features. This results in keeping an ACL link up without any users. The problem here is that the Bluetooth specification doesn't define an ownership of the ACL link and thus it can happen that the implementation on the initiator side doesn't care about disconnecting unused links. In this case the acceptor needs to take care of this. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2008-09-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: bridge: don't allow setting hello time to zero netns : fix kernel panic in timewait socket destruction pkt_sched: Fix qdisc state in net_tx_action() netfilter: nf_conntrack_irc: make sure string is terminated before calling simple_strtoul netfilter: nf_conntrack_gre: nf_ct_gre_keymap_flush() fixlet netfilter: nf_conntrack_gre: more locking around keymap list netfilter: nf_conntrack_sip: de-static helper pointers
2008-09-08bridge: don't allow setting hello time to zeroStephen Hemminger
Dushan Tcholich reports that on his system ksoftirqd can consume between %6 to %10 of cpu time, and cause ~200 context switches per second. He then correlated this with a report by bdupree@techfinesse.com: http://marc.info/?l=linux-kernel&m=119613299024398&w=2 and the culprit cause seems to be starting the bridge interface. In particular, when starting the bridge interface, his scripts are specifying a hello timer interval of "0". The bridge hello time can't be safely set to values less than 1 second, otherwise it is possible to end up with a runaway timer. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-08netns : fix kernel panic in timewait socket destructionDaniel Lezcano
How to reproduce ? - create a network namespace - use tcp protocol and get timewait socket - exit the network namespace - after a moment (when the timewait socket is destroyed), the kernel panics. # BUG: unable to handle kernel NULL pointer dereference at 0000000000000007 IP: [<ffffffff821e394d>] inet_twdr_do_twkill_work+0x6e/0xb8 PGD 119985067 PUD 11c5c0067 PMD 0 Oops: 0000 [1] SMP CPU 1 Modules linked in: ipv6 button battery ac loop dm_mod tg3 libphy ext3 jbd edd fan thermal processor thermal_sys sg sata_svw libata dock serverworks sd_mod scsi_mod ide_disk ide_core [last unloaded: freq_table] Pid: 0, comm: swapper Not tainted 2.6.27-rc2 #3 RIP: 0010:[<ffffffff821e394d>] [<ffffffff821e394d>] inet_twdr_do_twkill_work+0x6e/0xb8 RSP: 0018:ffff88011ff7fed0 EFLAGS: 00010246 RAX: ffffffffffffffff RBX: ffffffff82339420 RCX: ffff88011ff7ff30 RDX: 0000000000000001 RSI: ffff88011a4d03c0 RDI: ffff88011ac2fc00 RBP: ffffffff823392e0 R08: 0000000000000000 R09: ffff88002802a200 R10: ffff8800a5c4b000 R11: ffffffff823e4080 R12: ffff88011ac2fc00 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000041cbd940(0000) GS:ffff8800bff839c0(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 0000000000000007 CR3: 00000000bd87c000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 0, threadinfo ffff8800bff9e000, task ffff88011ff76690) Stack: ffffffff823392e0 0000000000000100 ffffffff821e3a3a 0000000000000008 0000000000000000 ffffffff821e3a61 ffff8800bff7c000 ffffffff8203c7e7 ffff88011ff7ff10 ffff88011ff7ff10 0000000000000021 ffffffff82351108 Call Trace: <IRQ> [<ffffffff821e3a3a>] ? inet_twdr_hangman+0x0/0x9e [<ffffffff821e3a61>] ? inet_twdr_hangman+0x27/0x9e [<ffffffff8203c7e7>] ? run_timer_softirq+0x12c/0x193 [<ffffffff820390d1>] ? __do_softirq+0x5e/0xcd [<ffffffff8200d08c>] ? call_softirq+0x1c/0x28 [<ffffffff8200e611>] ? do_softirq+0x2c/0x68 [<ffffffff8201a055>] ? smp_apic_timer_interrupt+0x8e/0xa9 [<ffffffff8200cad6>] ? apic_timer_interrupt+0x66/0x70 <EOI> [<ffffffff82011f4c>] ? default_idle+0x27/0x3b [<ffffffff8200abbd>] ? cpu_idle+0x5f/0x7d Code: e8 01 00 00 4c 89 e7 41 ff c5 e8 8d fd ff ff 49 8b 44 24 38 4c 89 e7 65 8b 14 25 24 00 00 00 89 d2 48 8b 80 e8 00 00 00 48 f7 d0 <48> 8b 04 d0 48 ff 40 58 e8 fc fc ff ff 48 89 df e8 c0 5f 04 00 RIP [<ffffffff821e394d>] inet_twdr_do_twkill_work+0x6e/0xb8 RSP <ffff88011ff7fed0> CR2: 0000000000000007 This patch provides a function to purge all timewait sockets related to a network namespace. The timewait sockets life cycle is not tied with the network namespace, that means the timewait sockets stay alive while the network namespace dies. The timewait sockets are for avoiding to receive a duplicate packet from the network, if the network namespace is freed, the network stack is removed, so no chance to receive any packets from the outside world. Furthermore, having a pending destruction timer on these sockets with a network namespace freed is not safe and will lead to an oops if the timer callback which try to access data belonging to the namespace like for example in: inet_twdr_do_twkill_work -> NET_INC_STATS_BH(twsk_net(tw), LINUX_MIB_TIMEWAITED); Purging the timewait sockets at the network namespace destruction will: 1) speed up memory freeing for the namespace 2) fix kernel panic on asynchronous timewait destruction Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com> Acked-by: Denis V. Lunev <den@openvz.org> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-07pkt_sched: Fix qdisc state in net_tx_action()Jarek Poplawski
net_tx_action() can skip __QDISC_STATE_SCHED bit clearing while qdisc is neither ran nor rescheduled, which may cause endless loop in dev_deactivate(). Reported-by: Denys Fedoryshchenko <denys@visp.net.lb> Tested-by: Denys Fedoryshchenko <denys@visp.net.lb> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-07netfilter: nf_conntrack_irc: make sure string is terminated before calling ↵Patrick McHardy
simple_strtoul Alexey Dobriyan points out: 1. simple_strtoul() silently accepts all characters for given base even if result won't fit into unsigned long. This is amazing stupidity in itself, but 2. nf_conntrack_irc helper use simple_strtoul() for DCC request parsing. Data first copied into 64KB buffer, so theoretically nothing prevents reading past the end of it, since data comes from network given 1). This is not actually a problem currently since we're guaranteed to have a 0 byte in skb_shared_info or in the buffer the data is copied to, but to make this more robust, make sure the string is actually terminated. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-07netfilter: nf_conntrack_gre: nf_ct_gre_keymap_flush() fixletAlexey Dobriyan
It does "kfree(list_head)" which looks wrong because entity that was allocated is definitely not list_head. However, this all works because list_head is first item in struct nf_ct_gre_keymap. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-07netfilter: nf_conntrack_gre: more locking around keymap listAlexey Dobriyan
gre_keymap_list should be protected in all places. (unless I'm misreading something) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-07netfilter: nf_conntrack_sip: de-static helper pointersAlexey Dobriyan
Helper's ->help hook can run concurrently with itself, so iterating over SIP helpers with static pointer won't work reliably. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-05Revert "mac80211: Use IWEVASSOCREQIE instead of IWEVCUSTOM"Linus Torvalds
This reverts commit 087d833e5a9f67ba933cb32eaf5a2279c1a5b47c, which was reported to break wireless at least in some combinations with 32bit user space and a 64bit kernel. Alex Williamnson bisected it to this commit. Reported-and-bisected-by: Alex Williamson <alex.williamson@hp.com> Acked-by: John W. Linville <linville@tuxdriver.com> Cc: David Miller <davem@davemloft.net> Cc: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: bnx2x: Accessing un-mapped page ath9k: Fix TX control flag use for no ACK and RTS/CTS ath9k: Fix TX status reporting iwlwifi: fix STATUS_EXIT_PENDING is not set on pci_remove iwlwifi: call apm stop on exit iwlwifi: fix Tx cmd memory allocation failure handling iwlwifi: fix rx_chain computation iwlwifi: fix station mimo power save values iwlwifi: remove false rxon if rx chain changes iwlwifi: fix hidden ssid discovery in passive channels iwlwifi: W/A for the TSF correction in IBSS netxen: Remove workaround for chipset quirk pcnet-cs, axnet_cs: add new IDs, remove dup ID with less info ixgbe: initialize interrupt throttle rate net/usb/pegasus: avoid hundreds of diagnostics tipc: Don't use structure names which easily globally conflict.
2008-09-02tipc: Don't use structure names which easily globally conflict.David S. Miller
Andrew Morton reported a build failure on sparc32, because TIPC uses names like "struct node" and there is a like named data structure defined in linux/node.h This just regexp replaces "struct node*" to "struct tipc_node*" to avoid this and any future similar problems. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: ipsec: Fix deadlock in xfrm_state management. ipv: Re-enable IP when MTU > 68 net/xfrm: Use an IS_ERR test rather than a NULL test ath9: Fix ath_rx_flush_tid() for IRQs disabled kernel warning message. ath9k: Incorrect key used when group and pairwise ciphers are different. rt2x00: Compiler warning unmasked by fix of BUILD_BUG_ON mac80211: Fix debugfs union misuse and pointer corruption wireless/libertas/if_cs.c: fix memory leaks orinoco: Multicast to the specified addresses iwlwifi: fix 64bit platform firmware loading iwlwifi: fix apm_stop (wrong bit polarity for FLAG_INIT_DONE) iwlwifi: workaround interrupt handling no some platforms iwlwifi: do not use GFP_DMA in iwl_tx_queue_init net/wireless/Kconfig: clarify the description for CONFIG_WIRELESS_EXT_SYSFS net: Unbreak userspace usage of linux/mroute.h pkt_sched: Fix locking of qdisc_root with qdisc_root_sleeping_lock() ipv6: When we droped a packet, we should return NET_RX_DROP instead of 0
2008-09-02ipsec: Fix deadlock in xfrm_state management.David S. Miller
Ever since commit 4c563f7669c10a12354b72b518c2287ffc6ebfb3 ("[XFRM]: Speed up xfrm_policy and xfrm_state walking") it is illegal to call __xfrm_state_destroy (and thus xfrm_state_put()) with xfrm_state_lock held. If we do, we'll deadlock since we have the lock already and __xfrm_state_destroy() tries to take it again. Fix this by pushing the xfrm_state_put() calls after the lock is dropped. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-02ipv: Re-enable IP when MTU > 68Breno Leitao
Re-enable IP when the MTU gets back to a valid size. This patch just checks if the in_dev is NULL on a NETDEV_CHANGEMTU event and if MTU is valid (bigger than 68), then re-enable in_dev. Also a function that checks valid MTU size was created. Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-02net/xfrm: Use an IS_ERR test rather than a NULL testJulien Brunel
In case of error, the function xfrm_bundle_create returns an ERR pointer, but never returns a NULL pointer. So a NULL test that comes after an IS_ERR test should be deleted. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @match_bad_null_test@ expression x, E; statement S1,S2; @@ x = xfrm_bundle_create(...) ... when != x = E * if (x != NULL) S1 else S2 // </smpl> Signed-off-by: Julien Brunel <brunel@diku.dk> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-02mac80211: Fix debugfs union misuse and pointer corruptionJouni Malinen
debugfs union in struct ieee80211_sub_if_data is misused by including a common default_key dentry as a union member. This ends occupying the same memory area with the first dentry in other union members (structures; usually drop_unencrypted). Consequently, debugfs operations on default_key symlinks and drop_unencrypted entry are using the same dentry pointer even though they are supposed to be separate ones. This can lead to removing entries incorrectly or potentially leaving something behind since one of the dentry pointers gets lost. Fix this by moving the default_key dentry to a new struct (common_debugfs) that contains dentries (more to be added in future) that are shared by all vif types. The debugfs union must only be used for vif type-specific entries to avoid this type of pointer corruption. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-09-02net/wireless/Kconfig: clarify the description for CONFIG_WIRELESS_EXT_SYSFSFlorian Mickler
Current setup with hal and NetworkManager will fail to work without newest hal version with this config option disabled. Although this will solve itself by time, at the moment it is dishonest to say that we don't know any software that uses it, if there are many many people relying on old hal versions. Signed-off-by: Florian Mickler <florian@mickler.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-09-02Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'for-2.6.27' of git://linux-nfs.org/~bfields/linux: nfsd: fix buffer overrun decoding NFSv4 acl sunrpc: fix possible overrun on read of /proc/sys/sunrpc/transports nfsd: fix compound state allocation error handling svcrdma: Fix race between svc_rdma_recvfrom thread and the dto_tasklet
2008-09-01sunrpc: fix possible overrun on read of /proc/sys/sunrpc/transportsCyrill Gorcunov
Vegard Nossum reported ---------------------- > I noticed that something weird is going on with /proc/sys/sunrpc/transports. > This file is generated in net/sunrpc/sysctl.c, function proc_do_xprt(). When > I "cat" this file, I get the expected output: > $ cat /proc/sys/sunrpc/transports > tcp 1048576 > udp 32768 > But I think that it does not check the length of the buffer supplied by > userspace to read(). With my original program, I found that the stack was > being overwritten by the characters above, even when the length given to > read() was just 1. David Wagner added (among other things) that copy_to_user could be probably used here. Ingo Oeser suggested to use simple_read_from_buffer() here. The conclusion is that proc_do_xprt doesn't check for userside buffer size indeed so fix this by using Ingo's suggestion. Reported-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> CC: Ingo Oeser <ioe-lkml@rameria.de> Cc: Neil Brown <neilb@suse.de> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Greg Banks <gnb@sgi.com> Cc: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2008-08-29pkt_sched: Fix locking of qdisc_root with qdisc_root_sleeping_lock()Jarek Poplawski
Use qdisc_root_sleeping_lock() instead of qdisc_root_lock() where appropriate. The only difference is while dev is deactivated, when currently we can use a sleeping qdisc with the lock of noop_qdisc. This shouldn't be dangerous since after deactivation root lock could be used only by gen_estimator code, but looks wrong anyway. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-29ipv6: When we droped a packet, we should return NET_RX_DROP instead of 0Yang Hongyang
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27sctp: fix random memory dereference with SCTP_HMAC_IDENT option.Vlad Yasevich
The number of identifiers needs to be checked against the option length. Also, the identifier index provided needs to be verified to make sure that it doesn't exceed the bounds of the array. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27sctp: correct bounds check in sctp_setsockopt_auth_keyVlad Yasevich
The bonds check to prevent buffer overlflow was not exactly right. It still allowed overflow of up to 8 bytes which is sizeof(struct sctp_authkey). Since optlen is already checked against the size of that struct, we are guaranteed not to cause interger overflow either. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27Merge branch 'no-iwlwifi' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2008-08-27ipv4: mode 0555 in ipv4_skeletonHugh Dickins
vpnc on today's kernel says Cannot open "/proc/sys/net/ipv4/route/flush": d--------- 0 root root 0 2008-08-26 11:32 /proc/sys/net/ipv4/route d--------- 0 root root 0 2008-08-26 19:16 /proc/sys/net/ipv4/neigh Signed-off-by: Hugh Dickins <hugh@veritas.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27tcp: fix tcp header size miscalculation when window scale is unusedPhilip Love
The size of the TCP header is miscalculated when the window scale ends up being 0. Additionally, this can be induced by sending a SYN to a passive open port with a window scale option with value 0. Signed-off-by: Philip Love <love_phil@emc.com> Signed-off-by: Adam Langley <agl@imperialviolet.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27pkt_sched: Fix gen_estimator locksJarek Poplawski
While passing a qdisc root lock to gen_new_estimator() and gen_replace_estimator() dev could be deactivated or even before grafting proper root qdisc as qdisc_sleeping (e.g. qdisc_create), so using qdisc_root_lock() is not enough. This patch adds qdisc_root_sleeping_lock() for this, plus additional checks, where necessary. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27pkt_sched: Use rcu_assign_pointer() to change dev_queue->qdiscJarek Poplawski
These pointers are RCU protected, so proper primitives should be used. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27pkt_sched: Fix dev_graft_qdisc() lockingJarek Poplawski
During dev_graft_qdisc() dev is deactivated, so qdisc_root_lock() returns wrong lock of noop_qdisc instead of qdisc_sleeping. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-26mac80211: quiet chatty IBSS merge messageJohn W. Linville
It seems obvious that this #ifndef should be the opposite polarity... Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26mac80211: don't send empty extended rates IEJan-Espen Pettersen
The association request includes a list of supported data rates. 802.11b: 4 supported rates. 802.11g: 12 (8 + 4) supported rates. 802.11a: 8 supported rates. The rates tag of the assoc request has room for only 8 rates. In case of 802.11g an extended rate tag is appended. However in net/wireless/mlme.c an extended (empty) rate tag is also appended if the number of rates is exact 8. This empty (length=0) extended rates tag causes some APs to deny association with code 18 (unsupported rates). These APs include my ZyXEL G-570U, and according to Tomas Winkler som Cisco APs. 'If count == 8' has been used to check for the need for an extended rates tag. But count would also be equal to 8 if the for loop exited because of no more supported rates. Therefore a check for count being less than rates_len would seem more correct. Thanks to: * Dan Williams for newbie guidance * Tomas Winkler for confirming the problem Signed-off-by: Jan-Espen Pettersen <sigsegv@radiotube.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26mac80211: Fix debugfs file add/del for netdevJouni Malinen
Previous version was using incorrect union structures for non-AP interfaces when adding and removing max_ratectrl_rateidx and force_unicast_rateidx entries. Depending on the vif type, this ended up in corrupting debugfs entries since the dentries inside different union structures ended up going being on top of eachother.. As the end result, debugfs files were being left behind with references to freed data (instant kernel oops on access) and directories were not removed properly when unloading mac80211 drivers. This patch fixes those issues by using only a single union structure based on the vif type. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26net/mac80211/mesh.c: correct the argument to __mesh_table_freeJulia Lawall
In the function mesh_table_grow, it is the new table not the argument table that should be freed if the function fails (cf commit bd9b448f4c0a514559bdae4ca18ca3e8cd999c6d) The semantic match that detects this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; expression E,f; position p1,p2,p3; identifier l; statement S; @@ x = mesh_table_alloc@p1(...) ... if (x == NULL) S ... when != E = x when != mesh_table_free(x) goto@p2 l; ... when != E = x when != f(...,x,...) when any ( return \(0\|x\); | return@p3 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; p3 << r.p3; @@ print "%s: call on line %s not freed or saved before return on line %s via line %s" % (p1[0].file,p1[0].line,p3[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26mac80211: Use IWEVASSOCREQIE instead of IWEVCUSTOMJouni Malinen
The previous code was using IWEVCUSTOM to report IEs from AssocReq and AssocResp frames into user space. This can easily hit the 256 byte limit (IW_CUSTOM_MAX) with APs that include number of vendor IEs in AssocResp. This results in the event message not being sent and dmesg showing "wlan0 (WE) : Wireless Event too big (366)" type of errors. Convert mac80211 to use IWEVASSOCREQIE/IWEVASSOCRESPIE to avoid the issue of being unable to send association IEs as wireless events. These newer event types use binary encoding and larger maximum size (IW_GENERIC_IE_MAX = 1024), so the likelyhood of not being able to send the IEs is much smaller than with IWEVCUSTOM. As an extra benefit, the code is also quite a bit simpler since there is no need to allocate an extra buffer for hex encoding. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26net: rfkill: add missing line breakFelipe Balbi
Trivial patch adding a missing line break on rfkill_claim_show(). Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Acked-by: Ivo van Doorn <IvDoorn@gmail.co> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-25ipv6: sysctl fixesAl Viro
Braino: net.ipv6 in ipv6 skeleton has no business in rotable class Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-25ipv4: sysctl fixesAl Viro
net.ipv4.neigh should be a part of skeleton to avoid ordering problems Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-25sctp: add verification checks to SCTP_AUTH_KEY optionVlad Yasevich
The structure used for SCTP_AUTH_KEY option contains a length that needs to be verfied to prevent buffer overflow conditions. Spoted by Eugene Teo <eteo@redhat.com>. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-23ipv6: protocol for address routesStephen Hemminger
This fixes a problem spotted with zebra, but not sure if it is necessary a kernel problem. With IPV6 when an address is added to an interface, Zebra creates a duplicate RIB entry, one as a connected route, and other as a kernel route. When an address is added to an interface the RTN_NEWADDR message causes Zebra to create a connected route. In IPV4 when an address is added to an interface a RTN_NEWROUTE message is set to user space with the protocol RTPROT_KERNEL. Zebra ignores these messages, because it already has the connected route. The problem is that route created in IPV6 has route protocol == RTPROT_BOOT. Was this a design decision or a bug? This fixes it. Same patch applies to both net-2.6 and stable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-23icmp: icmp_sk() should not use smp_processor_id() in preemptible codeDenis V. Lunev
Pass namespace into icmp_xmit_lock, obtain socket inside and return it as a result for caller. Thanks Alexey Dobryan for this report: Steps to reproduce: CONFIG_PREEMPT=y CONFIG_DEBUG_PREEMPT=y tracepath <something> BUG: using smp_processor_id() in preemptible [00000000] code: tracepath/3205 caller is icmp_sk+0x15/0x30 Pid: 3205, comm: tracepath Not tainted 2.6.27-rc4 #1 Call Trace: [<ffffffff8031af14>] debug_smp_processor_id+0xe4/0xf0 [<ffffffff80409405>] icmp_sk+0x15/0x30 [<ffffffff8040a17b>] icmp_send+0x4b/0x3f0 [<ffffffff8025a415>] ? trace_hardirqs_on_caller+0xd5/0x160 [<ffffffff8025a4ad>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8023a475>] ? local_bh_enable_ip+0x95/0x110 [<ffffffff804285b9>] ? _spin_unlock_bh+0x39/0x40 [<ffffffff8025a26c>] ? mark_held_locks+0x4c/0x90 [<ffffffff8025a4ad>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8025a415>] ? trace_hardirqs_on_caller+0xd5/0x160 [<ffffffff803e91b4>] ip_fragment+0x8d4/0x900 [<ffffffff803e7030>] ? ip_finish_output2+0x0/0x290 [<ffffffff803e91e0>] ? ip_finish_output+0x0/0x60 [<ffffffff803e6650>] ? dst_output+0x0/0x10 [<ffffffff803e922c>] ip_finish_output+0x4c/0x60 [<ffffffff803e92e3>] ip_output+0xa3/0xf0 [<ffffffff803e68d0>] ip_local_out+0x20/0x30 [<ffffffff803e753f>] ip_push_pending_frames+0x27f/0x400 [<ffffffff80406313>] udp_push_pending_frames+0x233/0x3d0 [<ffffffff804067d1>] udp_sendmsg+0x321/0x6f0 [<ffffffff8040d155>] inet_sendmsg+0x45/0x80 [<ffffffff803b967f>] sock_sendmsg+0xdf/0x110 [<ffffffff8024a100>] ? autoremove_wake_function+0x0/0x40 [<ffffffff80257ce5>] ? validate_chain+0x415/0x1010 [<ffffffff8027dc10>] ? __do_fault+0x140/0x450 [<ffffffff802597d0>] ? __lock_acquire+0x260/0x590 [<ffffffff803b9e55>] ? sockfd_lookup_light+0x45/0x80 [<ffffffff803ba50a>] sys_sendto+0xea/0x120 [<ffffffff80428e42>] ? _spin_unlock_irqrestore+0x42/0x80 [<ffffffff803134bc>] ? __up_read+0x4c/0xb0 [<ffffffff8024e0c6>] ? up_read+0x26/0x30 [<ffffffff8020b8bb>] system_call_fastpath+0x16/0x1b icmp6_sk() is similar. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-22pkt_sched: Fix qdisc list lockingJarek Poplawski
Since some qdiscs call qdisc_tree_decrease_qlen() (so qdisc_lookup()) without rtnl_lock(), adding and deleting from a qdisc list needs additional locking. This patch adds global spinlock qdisc_list_lock and wrapper functions for modifying the list. It is considered as a temporary solution until hfsc_dequeue(), netem_dequeue() and tbf_dequeue() (or qdisc_tree_decrease_qlen()) are redone. With feedback from Herbert Xu and David S. Miller. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-21pkt_sched: Fix qdisc_watchdog() vs. dev_deactivate() raceJarek Poplawski
dev_deactivate() can skip rescheduling of a qdisc by qdisc_watchdog() or other timer calling netif_schedule() after dev_queue_deactivate(). We prevent this checking aliveness before scheduling the timer. Since during deactivation the root qdisc is available only as qdisc_sleeping additional accessor qdisc_root_sleeping() is created. With feedback from Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-21sctp: fix potential panics in the SCTP-AUTH API.Vlad Yasevich
All of the SCTP-AUTH socket options could cause a panic if the extension is disabled and the API is envoked. Additionally, there were some additional assumptions that certain pointers would always be valid which may not always be the case. This patch hardens the API and address all of the crash scenarios. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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