1. 27 Oct, 2009 4 commits
  2. 24 Oct, 2009 3 commits
  3. 22 Oct, 2009 9 commits
  4. 21 Oct, 2009 1 commit
  5. 20 Oct, 2009 6 commits
  6. 19 Oct, 2009 8 commits
    • Eric Dumazet's avatar
      net: Fix IP_MULTICAST_IF · 55b80503
      Eric Dumazet authored
      ipv4/ipv6 setsockopt(IP_MULTICAST_IF) have dubious __dev_get_by_index() calls.
      
      This function should be called only with RTNL or dev_base_lock held, or reader
      could see a corrupt hash chain and eventually enter an endless loop.
      
      Fix is to call dev_get_by_index()/dev_put().
      
      If this happens to be performance critical, we could define a new dev_exist_by_index()
      function to avoid touching dev refcount.
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      55b80503
    • Dave Young's avatar
      bluetooth: static lock key fix · 45054dc1
      Dave Young authored
      When shutdown ppp connection, lockdep waring about non-static key
      will happen, it is caused by the lock is not initialized properly
      at that time.
      
      Fix with tuning the lock/skb_queue_head init order
      
      [   94.339261] INFO: trying to register non-static key.
      [   94.342509] the code is fine but needs lockdep annotation.
      [   94.342509] turning off the locking correctness validator.
      [   94.342509] Pid: 0, comm: swapper Not tainted 2.6.31-mm1 #2
      [   94.342509] Call Trace:
      [   94.342509]  [<c0248fbe>] register_lock_class+0x58/0x241
      [   94.342509]  [<c024b5df>] ? __lock_acquire+0xb57/0xb73
      [   94.342509]  [<c024ab34>] __lock_acquire+0xac/0xb73
      [   94.342509]  [<c024b7fa>] ? lock_release_non_nested+0x17b/0x1de
      [   94.342509]  [<c024b662>] lock_acquire+0x67/0x84
      [   94.342509]  [<c04cd1eb>] ? skb_dequeue+0x15/0x41
      [   94.342509]  [<c054a857>] _spin_lock_irqsave+0x2f/0x3f
      [   94.342509]  [<c04cd1eb>] ? skb_dequeue+0x15/0x41
      [   94.342509]  [<c04cd1eb>] skb_dequeue+0x15/0x41
      [   94.342509]  [<c054a648>] ? _read_unlock+0x1d/0x20
      [   94.342509]  [<c04cd641>] skb_queue_purge+0x14/0x1b
      [   94.342509]  [<fab94fdc>] l2cap_recv_frame+0xea1/0x115a [l2cap]
      [   94.342509]  [<c024b5df>] ? __lock_acquire+0xb57/0xb73
      [   94.342509]  [<c0249c04>] ? mark_lock+0x1e/0x1c7
      [   94.342509]  [<f8364963>] ? hci_rx_task+0xd2/0x1bc [bluetooth]
      [   94.342509]  [<fab95346>] l2cap_recv_acldata+0xb1/0x1c6 [l2cap]
      [   94.342509]  [<f8364997>] hci_rx_task+0x106/0x1bc [bluetooth]
      [   94.342509]  [<fab95295>] ? l2cap_recv_acldata+0x0/0x1c6 [l2cap]
      [   94.342509]  [<c02302c4>] tasklet_action+0x69/0xc1
      [   94.342509]  [<c022fbef>] __do_softirq+0x94/0x11e
      [   94.342509]  [<c022fcaf>] do_softirq+0x36/0x5a
      [   94.342509]  [<c022fe14>] irq_exit+0x35/0x68
      [   94.342509]  [<c0204ced>] do_IRQ+0x72/0x89
      [   94.342509]  [<c02038ee>] common_interrupt+0x2e/0x34
      [   94.342509]  [<c024007b>] ? pm_qos_add_requirement+0x63/0x9d
      [   94.342509]  [<c038e8a5>] ? acpi_idle_enter_bm+0x209/0x238
      [   94.342509]  [<c049d238>] cpuidle_idle_call+0x5c/0x94
      [   94.342509]  [<c02023f8>] cpu_idle+0x4e/0x6f
      [   94.342509]  [<c0534153>] rest_init+0x53/0x55
      [   94.342509]  [<c0781894>] start_kernel+0x2f0/0x2f5
      [   94.342509]  [<c0781091>] i386_start_kernel+0x91/0x96
      Reported-by: default avatarOliver Hartkopp <oliver@hartkopp.net>
      Signed-off-by: default avatarDave Young <hidave.darkstar@gmail.com>
      Tested-by: default avatarOliver Hartkopp <oliver@hartkopp.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      45054dc1
    • Dave Young's avatar
      bluetooth: scheduling while atomic bug fix · f74c77cb
      Dave Young authored
      Due to driver core changes dev_set_drvdata will call kzalloc which should be
      in might_sleep context, but hci_conn_add will be called in atomic context
      
      Like dev_set_name move dev_set_drvdata to work queue function.
      
      oops as following:
      
      Oct  2 17:41:59 darkstar kernel: [  438.001341] BUG: sleeping function called from invalid context at mm/slqb.c:1546
      Oct  2 17:41:59 darkstar kernel: [  438.001345] in_atomic(): 1, irqs_disabled(): 0, pid: 2133, name: sdptool
      Oct  2 17:41:59 darkstar kernel: [  438.001348] 2 locks held by sdptool/2133:
      Oct  2 17:41:59 darkstar kernel: [  438.001350]  #0:  (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.+.}, at: [<faa1d2f5>] lock_sock+0xa/0xc [l2cap]
      Oct  2 17:41:59 darkstar kernel: [  438.001360]  #1:  (&hdev->lock){+.-.+.}, at: [<faa20e16>] l2cap_sock_connect+0x103/0x26b [l2cap]
      Oct  2 17:41:59 darkstar kernel: [  438.001371] Pid: 2133, comm: sdptool Not tainted 2.6.31-mm1 #2
      Oct  2 17:41:59 darkstar kernel: [  438.001373] Call Trace:
      Oct  2 17:41:59 darkstar kernel: [  438.001381]  [<c022433f>] __might_sleep+0xde/0xe5
      Oct  2 17:41:59 darkstar kernel: [  438.001386]  [<c0298843>] __kmalloc+0x4a/0x15a
      Oct  2 17:41:59 darkstar kernel: [  438.001392]  [<c03f0065>] ? kzalloc+0xb/0xd
      Oct  2 17:41:59 darkstar kernel: [  438.001396]  [<c03f0065>] kzalloc+0xb/0xd
      Oct  2 17:41:59 darkstar kernel: [  438.001400]  [<c03f04ff>] device_private_init+0x15/0x3d
      Oct  2 17:41:59 darkstar kernel: [  438.001405]  [<c03f24c5>] dev_set_drvdata+0x18/0x26
      Oct  2 17:41:59 darkstar kernel: [  438.001414]  [<fa51fff7>] hci_conn_init_sysfs+0x40/0xd9 [bluetooth]
      Oct  2 17:41:59 darkstar kernel: [  438.001422]  [<fa51cdc0>] ? hci_conn_add+0x128/0x186 [bluetooth]
      Oct  2 17:41:59 darkstar kernel: [  438.001429]  [<fa51ce0f>] hci_conn_add+0x177/0x186 [bluetooth]
      Oct  2 17:41:59 darkstar kernel: [  438.001437]  [<fa51cf8a>] hci_connect+0x3c/0xfb [bluetooth]
      Oct  2 17:41:59 darkstar kernel: [  438.001442]  [<faa20e87>] l2cap_sock_connect+0x174/0x26b [l2cap]
      Oct  2 17:41:59 darkstar kernel: [  438.001448]  [<c04c8df5>] sys_connect+0x60/0x7a
      Oct  2 17:41:59 darkstar kernel: [  438.001453]  [<c024b703>] ? lock_release_non_nested+0x84/0x1de
      Oct  2 17:41:59 darkstar kernel: [  438.001458]  [<c028804b>] ? might_fault+0x47/0x81
      Oct  2 17:41:59 darkstar kernel: [  438.001462]  [<c028804b>] ? might_fault+0x47/0x81
      Oct  2 17:41:59 darkstar kernel: [  438.001468]  [<c033361f>] ? __copy_from_user_ll+0x11/0xce
      Oct  2 17:41:59 darkstar kernel: [  438.001472]  [<c04c9419>] sys_socketcall+0x82/0x17b
      Oct  2 17:41:59 darkstar kernel: [  438.001477]  [<c020329d>] syscall_call+0x7/0xb
      Signed-off-by: default avatarDave Young <hidave.darkstar@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f74c77cb
    • Julian Anastasov's avatar
      tcp: fix TCP_DEFER_ACCEPT retrans calculation · b103cf34
      Julian Anastasov authored
      Fix TCP_DEFER_ACCEPT conversion between seconds and
      retransmission to match the TCP SYN-ACK retransmission periods
      because the time is converted to such retransmissions. The old
      algorithm selects one more retransmission in some cases. Allow
      up to 255 retransmissions.
      Signed-off-by: default avatarJulian Anastasov <ja@ssi.bg>
      Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b103cf34
    • Julian Anastasov's avatar
      tcp: reduce SYN-ACK retrans for TCP_DEFER_ACCEPT · 0c3d79bc
      Julian Anastasov authored
      Change SYN-ACK retransmitting code for the TCP_DEFER_ACCEPT
      users to not retransmit SYN-ACKs during the deferring period if
      ACK from client was received. The goal is to reduce traffic
      during the deferring period. When the period is finished
      we continue with sending SYN-ACKs (at least one) but this time
      any traffic from client will change the request to established
      socket allowing application to terminate it properly.
      Also, do not drop acked request if sending of SYN-ACK fails.
      Signed-off-by: default avatarJulian Anastasov <ja@ssi.bg>
      Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0c3d79bc
    • Julian Anastasov's avatar
      tcp: accept socket after TCP_DEFER_ACCEPT period · d1b99ba4
      Julian Anastasov authored
      Willy Tarreau and many other folks in recent years
      were concerned what happens when the TCP_DEFER_ACCEPT period
      expires for clients which sent ACK packet. They prefer clients
      that actively resend ACK on our SYN-ACK retransmissions to be
      converted from open requests to sockets and queued to the
      listener for accepting after the deferring period is finished.
      Then application server can decide to wait longer for data
      or to properly terminate the connection with FIN if read()
      returns EAGAIN which is an indication for accepting after
      the deferring period. This change still can have side effects
      for applications that expect always to see data on the accepted
      socket. Others can be prepared to work in both modes (with or
      without TCP_DEFER_ACCEPT period) and their data processing can
      ignore the read=EAGAIN notification and to allocate resources for
      clients which proved to have no data to send during the deferring
      period. OTOH, servers that use TCP_DEFER_ACCEPT=1 as flag (not
      as a timeout) to wait for data will notice clients that didn't
      send data for 3 seconds but that still resend ACKs.
      Thanks to Willy Tarreau for the initial idea and to
      Eric Dumazet for the review and testing the change.
      Signed-off-by: default avatarJulian Anastasov <ja@ssi.bg>
      Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d1b99ba4
    • David S. Miller's avatar
      Revert "tcp: fix tcp_defer_accept to consider the timeout" · a1a2ad91
      David S. Miller authored
      This reverts commit 6d01a026.
      
      Julian Anastasov, Willy Tarreau and Eric Dumazet have come up
      with a more correct way to deal with this.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a1a2ad91
    • Tomoki Sekiyama's avatar
      AF_UNIX: Fix deadlock on connecting to shutdown socket · 77238f2b
      Tomoki Sekiyama authored
      I found a deadlock bug in UNIX domain socket, which makes able to DoS
      attack against the local machine by non-root users.
      
      How to reproduce:
      1. Make a listening AF_UNIX/SOCK_STREAM socket with an abstruct
          namespace(*), and shutdown(2) it.
       2. Repeat connect(2)ing to the listening socket from the other sockets
          until the connection backlog is full-filled.
       3. connect(2) takes the CPU forever. If every core is taken, the
          system hangs.
      
      PoC code: (Run as many times as cores on SMP machines.)
      
      int main(void)
      {
      	int ret;
      	int csd;
      	int lsd;
      	struct sockaddr_un sun;
      
      	/* make an abstruct name address (*) */
      	memset(&sun, 0, sizeof(sun));
      	sun.sun_family = PF_UNIX;
      	sprintf(&sun.sun_path[1], "%d", getpid());
      
      	/* create the listening socket and shutdown */
      	lsd = socket(AF_UNIX, SOCK_STREAM, 0);
      	bind(lsd, (struct sockaddr *)&sun, sizeof(sun));
      	listen(lsd, 1);
      	shutdown(lsd, SHUT_RDWR);
      
      	/* connect loop */
      	alarm(15); /* forcely exit the loop after 15 sec */
      	for (;;) {
      		csd = socket(AF_UNIX, SOCK_STREAM, 0);
      		ret = connect(csd, (struct sockaddr *)&sun, sizeof(sun));
      		if (-1 == ret) {
      			perror("connect()");
      			break;
      		}
      		puts("Connection OK");
      	}
      	return 0;
      }
      
      (*) Make sun_path[0] = 0 to use the abstruct namespace.
          If a file-based socket is used, the system doesn't deadlock because
          of context switches in the file system layer.
      
      Why this happens:
       Error checks between unix_socket_connect() and unix_wait_for_peer() are
       inconsistent. The former calls the latter to wait until the backlog is
       processed. Despite the latter returns without doing anything when the
       socket is shutdown, the former doesn't check the shutdown state and
       just retries calling the latter forever.
      
      Patch:
       The patch below adds shutdown check into unix_socket_connect(), so
       connect(2) to the shutdown socket will return -ECONREFUSED.
      Signed-off-by: default avatarTomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com>
      Signed-off-by: default avatarMasanori Yoshida <masanori.yoshida.tv@hitachi.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      77238f2b
  7. 18 Oct, 2009 2 commits
  8. 16 Oct, 2009 1 commit
    • Randy Dunlap's avatar
      vmxnet3: use dev_dbg, fix build for CONFIG_BLOCK=n · f6965582
      Randy Dunlap authored
      vmxnet3 was using dprintk() for debugging output.  This was
      defined in <linux/dst.h> and was the only thing that was
      used from that header file.  This caused compile errors
      when CONFIG_BLOCK was not enabled due to bio* and BIO*
      uses in the header file, so change this driver to use
      dev_dbg() for debugging output.
      
      include/linux/dst.h:520: error: dereferencing pointer to incomplete type
      include/linux/dst.h:520: error: 'BIO_POOL_BITS' undeclared (first use in this function)
      include/linux/dst.h:521: error: dereferencing pointer to incomplete type
      include/linux/dst.h:522: error: dereferencing pointer to incomplete type
      include/linux/dst.h:525: error: dereferencing pointer to incomplete type
      make[4]: *** [drivers/net/vmxnet3/vmxnet3_drv.o] Error 1
      Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
      Signed-off-by: default avatarBhavesh Davda <bhavesh@vmware.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f6965582
  9. 15 Oct, 2009 3 commits
    • Eric Dumazet's avatar
      virtio_net: use dev_kfree_skb_any() in free_old_xmit_skbs() · ed79bab8
      Eric Dumazet authored
      Because netpoll can call netdevice start_xmit() method with
      irqs disabled, drivers should not call kfree_skb() from
      their start_xmit(), but use dev_kfree_skb_any() instead.
      
      Oct  8 11:16:52 172.30.1.31 [113074.791813] ------------[ cut here ]------------
      Oct  8 11:16:52 172.30.1.31 [113074.791813] WARNING: at net/core/skbuff.c:398 \
                      skb_release_head_state+0x64/0xc8()
      Oct  8 11:16:52 172.30.1.31 [113074.791813] Hardware name:
      Oct  8 11:16:52 172.30.1.31 [113074.791813] Modules linked in: netconsole ocfs2 jbd2 quota_tree \
      ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs crc32c drbd cn loop \
      serio_raw psmouse snd_pcm snd_timer snd soundcore snd_page_alloc virtio_net pcspkr parport_pc parport \
      i2c_piix4 i2c_core button processor evdev ext3 jbd mbcache dm_mirror dm_region_hash dm_log dm_snapshot \
      dm_mod ide_cd_mod cdrom ata_generic ata_piix virtio_blk libata scsi_mod piix ide_pci_generic ide_core \
                      virtio_pci virtio_ring virtio floppy thermal fan thermal_sys [last unloaded: netconsole]
      Oct  8 11:16:52 172.30.1.31 [113074.791813] Pid: 11132, comm: php5-cgi Tainted: G        W  \
                      2.6.31.2-vserver #1
      Oct  8 11:16:52 172.30.1.31 [113074.791813] Call Trace:
      Oct  8 11:16:52 172.30.1.31 [113074.791813] <IRQ>  [<ffffffff81253cd5>] ? \
                      skb_release_head_state+0x64/0xc8
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81253cd5>] ? skb_release_head_state+0x64/0xc8
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81049ae1>] ? warn_slowpath_common+0x77/0xa3
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81253cd5>] ? skb_release_head_state+0x64/0xc8
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81253a1a>] ? __kfree_skb+0x9/0x7d
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffffa01cb139>] ? free_old_xmit_skbs+0x51/0x6e \
                      [virtio_net]
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffffa01cbc85>] ? start_xmit+0x26/0xf2 [virtio_net]
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff8126934f>] ? netpoll_send_skb+0xd2/0x205
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffffa0429216>] ? write_msg+0x90/0xeb [netconsole]
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81049f06>] ? __call_console_drivers+0x5e/0x6f
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff8102b49d>] ? kvm_clock_read+0x4d/0x52
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff8104a082>] ? release_console_sem+0x115/0x1ba
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff8104a632>] ? vprintk+0x2f2/0x34b
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff8106b142>] ? vx_update_load+0x18/0x13e
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81308309>] ? printk+0x4e/0x5d
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff8102b49d>] ? kvm_clock_read+0x4d/0x52
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81070b62>] ? getnstimeofday+0x55/0xaf
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81062683>] ? ktime_get_ts+0x21/0x49
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff810626b7>] ? ktime_get+0xc/0x41
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81062788>] ? hrtimer_interrupt+0x9c/0x146
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81024a4b>] ? smp_apic_timer_interrupt+0x80/0x93
      Oct  8 11:16:52 172.30.1.31 [113074.791813] [<ffffffff81011663>] ? apic_timer_interrupt+0x13/0x20
      Oct  8 11:16:52 172.30.1.31 [113074.791813] <EOI>  [<ffffffff8130a9eb>] ? _spin_unlock_irq+0xd/0x31
      Reported-and-tested-by: default avatarMassimo Cetra <mcetra@navynet.it>
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Bug-Entry: http://bugzilla.kernel.org/show_bug.cgi?id=14378Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ed79bab8
    • Sathya Perla's avatar
      be2net: fix support for PCI hot plug · 43a04fdc
      Sathya Perla authored
      Before issuing any cmds to the FW, the driver must first wait
      till the fW becomes ready. This is needed for PCI hot plug when
      the driver can be probed while the card fw is being initialized.
      Signed-off-by: default avatarSathya Perla <sathyap@serverengines.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      43a04fdc
    • Sathya Perla's avatar
  10. 14 Oct, 2009 3 commits