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Date: Wed, 03 Jun 2009 19:12:18 +0200 From: Oliver Hartkopp <oliver@...tkopp.net> To: Marcel Holtmann <marcel@...tmann.org>, Linux Netdev List <netdev@...r.kernel.org>, linux-bluetooth@...r.kernel.org Subject: net-next-2.6: Bluetooth: NULL pointer dereference in tty_register_device Hi Marcel, this morning i got this NULL pointer dereference at boot time with Daves (that time) latest net-next-2.6 tree. Any idea about this bug? I only got this problem once so far. Regards, Oliver ---- Jun 3 09:41:52 vwagwolkf320 kernel: [ 25.591133] Bluetooth: L2CAP ver 2.13 Jun 3 09:41:52 vwagwolkf320 kernel: [ 25.617796] Bluetooth: L2CAP socket layer initialized Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.748174] Bletooth: RFCOMM socket layer initialized Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.759983] BUG: unable to handle kernel NULL pointer dereference at 00000054 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.759993] IP: [<c0276c44>] tty_register_device+0x10/0xb8 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760009] *pde = 00000000 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760014] Oops: 0000 [#1] SMP Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760020] last sysfs file: /sys/module/l2cap/initstate Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760025] Modules linked in: rfcomm(+) l2cap aes_i586 aes_generic snd_hda_codec_idt arc4 ecb cryptomgr aead pcompress snd_hda_intel crypto_blkcipher snd_hda_codec crypto_hash snd_pcm_oss snd_mixer_oss crypto_algapi snd_pcm snd_seq_oss b43 snd_seq_midi snd_rawmidi mac80211 snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 pcmcia snd i2c_i801 btusb ssb snd_page_alloc yenta_socket rsrc_nonstatic pcmcia_core bluetooth dell_laptop backlight rfkill dcdbas Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760088] Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760096] Pid: 3444, comm: rfcomm Not tainted (2.6.30-rc6-03219-gd455e5b #19) Latitude D830 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760103] EIP: 0060:[<c0276c44>] EFLAGS: 00010282 CPU: 0 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760110] EIP is at tty_register_device+0x10/0xb8 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760115] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760121] ESI: 00000000 EDI: 00000000 EBP: f63ebe88 ESP: f63ebe34 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760127] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760134] Process rfcomm (pid: 3444, ti=f63ea000 task=f6a9e840 task.ti=f63ea000) Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760138] Stack: Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760142] 00000000 f63ebe50 c013fb46 00000006 f6a9e840 c0127675 f62143c0 f63ebe60 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760153] c013fdb2 fa387621 00000000 f63ebe68 c013fde5 f63ebe74 c0127675 fa38a928 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760165] f63ebe7c c0127681 fa38a944 00000000 f62143c0 f63ebed8 fa387638 ffffffff Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760178] Call Trace: Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760182] [<c013fb46>] ? mark_held_locks+0x43/0x5b Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760192] [<c0127675>] ? _local_bh_enable_ip+0x97/0x9b Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760203] [<c013fdb2>] ? trace_hardirqs_on_caller+0x107/0x12f Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760211] [<fa387621>] ? rfcomm_dev_ioctl+0x33c/0x627 [rfcomm] Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760230] [<c013fde5>] ? trace_hardirqs_on+0xb/0xd Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760238] [<c0127675>] ? _local_bh_enable_ip+0x97/0x9b Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760247] [<c0127681>] ? local_bh_enable_ip+0x8/0xa Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760255] [<fa387638>] ? rfcomm_dev_ioctl+0x353/0x627 [rfcomm] Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760272] [<c012768e>] ? local_bh_enable+0xb/0xd Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760280] [<c033e72f>] ? lock_sock_nested+0xbe/0xc9 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760289] [<fa386072>] ? rfcomm_sock_ioctl+0x28/0x45 [rfcomm] Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760306] [<fa38607e>] ? rfcomm_sock_ioctl+0x34/0x45 [rfcomm] Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760321] [<c033c34b>] ? sock_ioctl+0x1d3/0x1f7 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760332] [<c033c178>] ? sock_ioctl+0x0/0x1f7 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760340] [<c0181e1f>] ? vfs_ioctl+0x22/0x69 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760350] [<c01822c6>] ? do_vfs_ioctl+0x460/0x499 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760358] [<c013fde5>] ? trace_hardirqs_on+0xb/0xd Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760365] [<c01672e7>] ? remove_vma+0x55/0x5b Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760376] [<c01672e7>] ? remove_vma+0x55/0x5b Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760384] [<c0167f58>] ? sys_munmap+0x31/0x37 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760392] [<c0102a4b>] ? sysenter_exit+0xf/0x18 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760401] [<c018232b>] ? sys_ioctl+0x2c/0x45 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760409] [<c0102a18>] ? sysenter_do_call+0x12/0x36 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760418] Code: 00 89 d8 e8 b7 d5 ef ff 8d 46 08 e8 ed 36 f0 ff 89 f0 e8 a8 d5 ef ff 5b 5e 5d c3 55 89 e5 57 89 d7 56 53 89 c3 83 ec 48 89 4d ac <8b> 70 54 8b 40 58 3b 53 60 89 45 b0 72 14 52 68 34 e0 4c c0 e8 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760481] EIP: [<c0276c44>] tty_register_device+0x10/0xb8 SS:ESP 0068:f63ebe34 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760491] CR2: 0000000000000054 Jun 3 09:41:53 vwagwolkf320 kernel: [ 25.760512] ---[ end trace ad03b3043ac52689 ]--- Jun 3 09:41:53 vwagwolkf320 kernel: [ 27.148514] Bluetooth: RFCOMM TTY layer initialized Jun 3 09:41:53 vwagwolkf320 kernel: [ 27.177881] Bluetooth: RFCOMM ver 1.11 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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