kernel/include/net/bluetooth/hci.h, branch linux-3.0.y

Bluetooth: hci_core: fix NULL-pointer dereference at unregister

2012-04-22T23:21:42Z

commit 94324962066231a938564bebad0f941cd2d06bb2 upstream. Make sure hci_dev_open returns immediately if hci_dev_unregister has been called. This fixes a race between hci_dev_open and hci_dev_unregister which can lead to a NULL-pointer dereference. Bug is 100% reproducible using hciattach and a disconnected serial port: 0. # hciattach -n /dev/ttyO1 any noflow 1. hci_dev_open called from hci_power_on grabs req lock 2. hci_init_req executes but device fails to initialise (times out eventually) 3. hci_dev_open is called from hci_sock_ioctl and sleeps on req lock 4. hci_uart_tty_close calls hci_dev_unregister and sleeps on req lock in hci_dev_do_close 5. hci_dev_open (1) releases req lock 6. hci_dev_do_close grabs req lock and returns as device is not up 7. hci_dev_unregister sleeps in destroy_workqueue 8. hci_dev_open (3) grabs req lock, calls hci_init_req and eventually sleeps 9. hci_dev_unregister finishes, while hci_dev_open is still running... [ 79.627136] INFO: trying to register non-static key. [ 79.632354] the code is fine but needs lockdep annotation. [ 79.638122] turning off the locking correctness validator. [ 79.643920] [] (unwind_backtrace+0x0/0xf8) from [] (__lock_acquire+0x1590/0x1ab0) [ 79.653594] [] (__lock_acquire+0x1590/0x1ab0) from [] (lock_acquire+0x9c/0x128) [ 79.663085] [] (lock_acquire+0x9c/0x128) from [] (run_timer_softirq+0x150/0x3ac) [ 79.672668] [] (run_timer_softirq+0x150/0x3ac) from [] (__do_softirq+0xd4/0x22c) [ 79.682281] [] (__do_softirq+0xd4/0x22c) from [] (irq_exit+0x8c/0x94) [ 79.690856] [] (irq_exit+0x8c/0x94) from [] (handle_IRQ+0x34/0x84) [ 79.699157] [] (handle_IRQ+0x34/0x84) from [] (omap3_intc_handle_irq+0x48/0x4c) [ 79.708648] [] (omap3_intc_handle_irq+0x48/0x4c) from [] (__irq_usr+0x3c/0x60) [ 79.718048] Exception stack(0xcf281fb0 to 0xcf281ff8) [ 79.723358] 1fa0: 0001e6a0 be8dab00 0001e698 00036698 [ 79.731933] 1fc0: 0002df98 0002df38 0000001f 00000000 b6f234d0 00000000 00000004 00000000 [ 79.740509] 1fe0: 0001e6f8 be8d6aa0 be8dac50 0000aab8 80000010 ffffffff [ 79.747497] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 79.756011] pgd = cf3b4000 [ 79.758850] [00000000] *pgd=8f0c7831, *pte=00000000, *ppte=00000000 [ 79.765502] Internal error: Oops: 80000007 [#1] [ 79.770294] Modules linked in: [ 79.773529] CPU: 0 Tainted: G W (3.3.0-rc6-00002-gb5d5c87 #421) [ 79.781066] PC is at 0x0 [ 79.783721] LR is at run_timer_softirq+0x16c/0x3ac [ 79.788787] pc : [<00000000>] lr : [] psr: 60000113 [ 79.788787] sp : cf281ee0 ip : 00000000 fp : cf280000 [ 79.800903] r10: 00000004 r9 : 00000100 r8 : b6f234d0 [ 79.806427] r7 : c0519c28 r6 : cf093488 r5 : c0561a00 r4 : 00000000 [ 79.813323] r3 : 00000000 r2 : c054eee0 r1 : 00000001 r0 : 00000000 [ 79.820190] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 79.827728] Control: 10c5387d Table: 8f3b4019 DAC: 00000015 [ 79.833801] Process gpsd (pid: 1265, stack limit = 0xcf2802e8) [ 79.839965] Stack: (0xcf281ee0 to 0xcf282000) [ 79.844573] 1ee0: 00000002 00000000 c0040a24 00000000 00000002 cf281f08 00200200 00000000 [ 79.853210] 1f00: 00000000 cf281f18 cf281f08 00000000 00000000 00000000 cf281f18 cf281f18 [ 79.861816] 1f20: 00000000 00000001 c056184c 00000000 00000001 b6f234d0 c0561848 00000004 [ 79.870452] 1f40: cf280000 c003a3b8 c051e79c 00000001 00000000 00000100 3fa9e7b8 0000000a [ 79.879089] 1f60: 00000025 cf280000 00000025 00000000 00000000 b6f234d0 00000000 00000004 [ 79.887756] 1f80: 00000000 c003a924 c053ad38 c0013a50 fa200000 cf281fb0 ffffffff c0008530 [ 79.896362] 1fa0: 0001e6a0 0000aab8 80000010 c037499c 0001e6a0 be8dab00 0001e698 00036698 [ 79.904998] 1fc0: 0002df98 0002df38 0000001f 00000000 b6f234d0 00000000 00000004 00000000 [ 79.913665] 1fe0: 0001e6f8 be8d6aa0 be8dac50 0000aab8 80000010 ffffffff 00fbf700 04ffff00 [ 79.922302] [] (run_timer_softirq+0x16c/0x3ac) from [] (__do_softirq+0xd4/0x22c) [ 79.931945] [] (__do_softirq+0xd4/0x22c) from [] (irq_exit+0x8c/0x94) [ 79.940582] [] (irq_exit+0x8c/0x94) from [] (handle_IRQ+0x34/0x84) [ 79.948913] [] (handle_IRQ+0x34/0x84) from [] (omap3_intc_handle_irq+0x48/0x4c) [ 79.958404] [] (omap3_intc_handle_irq+0x48/0x4c) from [] (__irq_usr+0x3c/0x60) [ 79.967773] Exception stack(0xcf281fb0 to 0xcf281ff8) [ 79.973083] 1fa0: 0001e6a0 be8dab00 0001e698 00036698 [ 79.981658] 1fc0: 0002df98 0002df38 0000001f 00000000 b6f234d0 00000000 00000004 00000000 [ 79.990234] 1fe0: 0001e6f8 be8d6aa0 be8dac50 0000aab8 80000010 ffffffff [ 79.997161] Code: bad PC value [ 80.000396] ---[ end trace 6f6739840475f9ee ]--- [ 80.005279] Kernel panic - not syncing: Fatal exception in interrupt Signed-off-by: Johan Hovold Acked-by: Marcel Holtmann Signed-off-by: Johan Hedberg Signed-off-by: Greg Kroah-Hartman

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem

2011-05-05T17:32:35Z

Conflicts: drivers/net/wireless/libertas/if_cs.c drivers/net/wireless/rtlwifi/pci.c net/bluetooth/l2cap_sock.c

Bluetooth: Add definitions for link key types

2011-04-28T18:02:04Z

Introduce the link key types defs and use them instead of magic numbers. Signed-off-by: Waldemar Rymarkiewicz Signed-off-by: Gustavo F. Padovan

net: Remove KERNEL cpp checks from include/net

2011-04-24T17:54:56Z

These header files are never installed to user consumption, so any __KERNEL__ cpp checks are superfluous. Projects should also not copy these files into their userland utility sources and try to use them there. If they insist on doing so, the onus is on them to sanitize the headers as needed. Signed-off-by: David S. Miller

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-2.6

2011-03-31T19:26:01Z

Bluetooth: Fix HCI_RESET command synchronization

2011-03-31T17:25:25Z

We can't send new commands before a cmd_complete for the HCI_RESET command shows up. Reported-by: Mikko Vinni Reported-by: Justin P. Mattock Reported-by: Ed Tomlinson Signed-off-by: Gustavo F. Padovan Tested-by: Justin P. Mattock Tested-by: Mikko Vinni Tested-by: Ed Tomlinson

Bluetooth: Add local Extended Inquiry Response (EIR) support

2011-03-31T17:22:58Z

This patch adds automated creation of the local EIR data based on what 16-bit UUIDs are registered and what the device name is. This should cover the majority use cases, however things like 32/128-bit UUIDs, TX power and Device ID will need to be added later to be on par with what bluetoothd is capable of doing (without the Management interface). Signed-off-by: Johan Hedberg Signed-off-by: Gustavo F. Padovan

Bluetooth: Add add/remove_remote_oob_data management commands

2011-03-31T17:22:57Z

This patch adds commands to add and remove remote OOB data to the managment interface. Remote data is stored in kernel and can be used by corresponding HCI commands and events when needed. Signed-off-by: Szymon Janc Signed-off-by: Gustavo F. Padovan

Bluetooth: Add read_local_oob_data management command