[Bug 613700] Re: kernel BUG at /build/buildd/linux-2.6.32/drivers/char/tty_ldisc.c:707!

[Simon Schubert]

I can confirm this BUG:

[  233.292555] hub 8-0:1.0: port 1 disabled by hub (EMI?), re-enabling...
[  233.292562] usb 8-1: USB disconnect, address 2
[  233.292685] ------------[ cut here ]------------
[  233.292688] kernel BUG at /build/buildd/linux-2.6.32/drivers/char/tty_ldisc.c:707!
[  233.292691] invalid opcode: 0000 [#1] SMP 
[  233.292695] last sysfs file: /sys/devices/pci0000:00/0000:00:1f.3/local_cpus
[  233.292698] CPU 2 
[  233.292701] Modules linked in: vboxnetadp vboxnetflt vboxdrv binfmt_misc kvm_intel kvm xfrm_user xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 des_generic xcbc rmd160 sha1_generic crypto_null af_key snd_hda_codec_via snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device ppdev ftdi_sio joydev tpm_tis tpm usbserial parport_pc asus_atk0110 snd tpm_bios xpad led_class ff_memless soundcore snd_page_alloc lp parport sha256_generic cryptd aes_x86_64 aes_generic dm_crypt raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor vga16fb vgastate usbhid hid i915 drm_kms_helper drm i2c_algo_bit ahci video output intel_agp e1000e
[  233.292788] Pid: 44, comm: khubd Not tainted 2.6.32-24-generic #39-Ubuntu System Product Name
[  233.292791] RIP: 0010:[<ffffffff81333d80>]  [<ffffffff81333d80>] tty_ldisc_reinit+0x50/0x60
[  233.292801] RSP: 0018:ffff880222663a90  EFLAGS: 00010202
[  233.292804] RAX: ffffffffffffffea RBX: ffff880209b23000 RCX: 0000000000000002
[  233.292807] RDX: 0000000000000002 RSI: ffffffff81a1ca80 RDI: 00000000000000e0
[  233.292810] RBP: ffff880222663aa0 R08: 000000000001ce53 R09: 0000000000883a08
[  233.292813] R10: 0000000000866bb5 R11: 0000000000000000 R12: 00000000000000e0
[  233.292816] R13: ffff880209b23020 R14: 0000000000000000 R15: 0000000000000001
[  233.292820] FS:  0000000000000000(0000) GS:ffff880028300000(0000) knlGS:0000000000000000
[  233.292823] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[  233.292826] CR2: 00007f620ca3b000 CR3: 00000001f08d5000 CR4: 00000000000026e0
[  233.292829] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  233.292832] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  233.292835] Process khubd (pid: 44, threadinfo ffff880222662000, task ffff8802226596f0)
[  233.292838] Stack:
[  233.292839]  ffff880209b23000 0000000000000000 ffff880222663ad0 ffffffff81333f50
[  233.292844] <0> ffff8801e0e90480 ffff880209b23208 ffff880209b23000 ffff880209b231d8
[  233.292850] <0> ffff880222663b30 ffffffff8132b9c6 ffff880209b23208 ffffffff810397a9
[  233.292855] Call Trace:
[  233.292860]  [<ffffffff81333f50>] tty_ldisc_hangup+0x1c0/0x1f0
[  233.292866]  [<ffffffff8132b9c6>] do_tty_hangup+0x146/0x400
[  233.292872]  [<ffffffff810397a9>] ? default_spin_lock_flags+0x9/0x10
[  233.292877]  [<ffffffff8132bc95>] tty_vhangup+0x15/0x20
[  233.292885]  [<ffffffffa024b72d>] usb_serial_disconnect+0xad/0x1a0 [usbserial]
[  233.292891]  [<ffffffff813dbdf4>] usb_unbind_interface+0x124/0x170
[  233.292898]  [<ffffffff8136b64f>] __device_release_driver+0x6f/0xe0
[  233.292902]  [<ffffffff8136b7bd>] device_release_driver+0x2d/0x40
[  233.292906]  [<ffffffff8136a7da>] bus_remove_device+0x9a/0xc0
[  233.292911]  [<ffffffff81368937>] device_del+0x127/0x1d0
[  233.292915]  [<ffffffff813d85a8>] usb_disable_device+0xa8/0x130
[  233.292920]  [<ffffffff813d2342>] usb_disconnect+0xd2/0x170
[  233.292925]  [<ffffffff813d29af>] hub_port_connect_change+0x8f/0x980
[  233.292930]  [<ffffffff81541645>] ? printk+0x41/0x44
[  233.292934]  [<ffffffff813d3ca2>] hub_events+0x3b2/0x5a0
[  233.292938]  [<ffffffff81541cb0>] ? thread_return+0x48/0x418
[  233.292943]  [<ffffffff813d3ee5>] hub_thread+0x55/0x190
[  233.292948]  [<ffffffff81085430>] ? autoremove_wake_function+0x0/0x40
[  233.292953]  [<ffffffff813d3e90>] ? hub_thread+0x0/0x190
[  233.292957]  [<ffffffff810850b6>] kthread+0x96/0xa0
[  233.292961]  [<ffffffff810141ea>] child_rip+0xa/0x20
[  233.292965]  [<ffffffff81085020>] ? kthread+0x0/0xa0
[  233.292969]  [<ffffffff810141e0>] ? child_rip+0x0/0x20
[  233.292971] Code: c7 43 40 00 00 00 00 44 89 e7 e8 7c fe ff ff 48 3d 00 f0 ff ff 77 14 48 89 43 40 44 89 e6 48 89 df e8 15 fa ff ff 5b 41 5c c9 c3 <0f> 0b eb fe 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 
[  233.293015] RIP  [<ffffffff81333d80>] tty_ldisc_reinit+0x50/0x60
[  233.293020]  RSP <ffff880222663a90>
[  233.293024] ---[ end trace 97c726107f759b8b ]---


** Changed in: linux-backports-modules-2.6.31 (Ubuntu)
       Status: New => Confirmed

-- 
 kernel BUG at /build/buildd/linux-2.6.32/drivers/char/tty_ldisc.c:707!
https://bugs.launchpad.net/bugs/613700
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