Dear all, I am trying to revive my Technotrend TT4400. However I ran into this kernel oops when trying to unplug/replug the dongle: What can have caused this? [6363904.273875] usb 1-5: USB disconnect, device number 13 [6363904.333388] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c0 [6363904.336250] IP: [<ffffffffc091ca4d>] si2168_sleep+0x2d/0xd0 [si2168] [6363904.336250] PGD 0 [6363904.336250] Oops: 0000 [#2] SMP [6363904.336250] Modules linked in: rc_tt_1500 si2157 si2168 dvb_usb_dvbsky dvb_usb_v2 m88ds3103 dvb_core rc_core i2c_mux bluetooth btrfs ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c ipt_REJECT nf_reject_ipv4 xt_multiport iptable_filter ip_tables x_tables binfmt_misc uvcvideo videobuf2_vmalloc ppdev videobuf2_memops videobuf2_core v4l2_common option snd_hda_codec_realtek videodev usb_wwan snd_hda_codec_generic media snd_usb_audio snd_hda_intel usbserial snd_hda_codec snd_usbmidi_lib snd_hda_core snd_hwdep input_leds snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer coretemp snd soundcore lpc_ich serio_raw shpchp 8250_fintek mac_hid parport_pc nfsd auth_rpcgss nfs_acl lockd grace sunrpc lp parport autofs4 raid10 raid1 raid0 multipath linear raid456 async_raid6_recov [6363904.336250] async_memcpy async_pq async_xor async_tx xor raid6_pq pata_marvell hid_generic uas usbhid hid usb_storage i915 psmouse video i2c_algo_bit drm_kms_helper ahci pata_acpi libahci drm sata_sil r8169 mii floppy [last unloaded: rc_tt_1500] [6363904.336250] CPU: 3 PID: 25469 Comm: kdvb-ad-0-fe-0 Tainted: G D W 4.2.0-19-generic #23-Ubuntu [6363904.336250] Hardware name: /LakePort, BIOS 6.00 PG 03/24/2009 [6363904.336250] task: ffff880002f8cb00 ti: ffff880002a08000 task.ti: ffff880002a08000 [6363904.336250] RIP: 0010:[<ffffffffc091ca4d>] [<ffffffffc091ca4d>] si2168_sleep+0x2d/0xd0 [si2168] [6363904.336250] RSP: 0018:ffff880002a0bd98 EFLAGS: 00010246 [6363904.336250] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88000017edf0 [6363904.336250] RDX: 0000000080000000 RSI: 0000000000000282 RDI: ffff880003802008 [6363904.336250] RBP: ffff880002a0bdd8 R08: 0000000000000000 R09: 0000000000000000 [6363904.336250] R10: 0000000000000016 R11: ffff880076eeb140 R12: ffff880003802008 [6363904.336250] R13: ffff88003519a000 R14: ffff88003519a5a8 R15: 00000000000000d6 [6363904.336250] FS: 0000000000000000(0000) GS:ffff88007f180000(0000) knlGS:0000000000000000 [6363904.336250] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [6363904.336250] CR2: 00000000000000c0 CR3: 00000000790bc000 CR4: 00000000000006e0 [6363904.336250] Stack: [6363904.336250] 000000015ed33a31 ffffffff810e5240 ffff880002f8cb00 ffffffff00000003 [6363904.336250] ffff8800ffffffff 000000001f734279 ffff88003519a460 ffff880003802008 [6363904.336250] ffff880002a0be18 ffffffffc0913be4 ffff880002a0be18 ffffffff810c3803 [6363904.336250] Call Trace: [6363904.336250] [<ffffffff810e5240>] ? trace_event_raw_event_tick_stop+0xf0/0xf0 [6363904.336250] [<ffffffffc0913be4>] dvb_usb_fe_sleep+0x74/0x1b0 [dvb_usb_v2] [6363904.336250] [<ffffffff810c3803>] ? down_interruptible+0x33/0x60 [6363904.336250] [<ffffffffc08fc15d>] dvb_frontend_thread+0x2bd/0x720 [dvb_core] [6363904.336250] [<ffffffff817ebb7c>] ? __schedule+0x36c/0x950 [6363904.336250] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60 [6363904.336250] [<ffffffffc08fbea0>] ? dvb_frontend_release+0xf0/0xf0 [dvb_core] [6363904.336250] [<ffffffff8109a7e8>] kthread+0xd8/0xf0 [6363904.336250] [<ffffffff8109a710>] ? kthread_create_on_node+0x1f0/0x1f0 [6363904.336250] [<ffffffff817f061f>] ret_from_fork+0x3f/0x70 [6363904.336250] [<ffffffff8109a710>] ? kthread_create_on_node+0x1f0/0x1f0 [6363904.336250] Code: 44 00 00 55 48 89 e5 41 54 53 48 83 ec 30 48 8b 9f 18 03 00 00 65 48 8b 04 25 28 00 00 00 48 89 45 e8 31 c0 f6 05 9d 27 00 00 04 <4c> 8b a3 c0 00 00 00 75 55 48 8d 75 c0 41 c6 84 24 28 05 00 00 [6363904.336250] RIP [<ffffffffc091ca4d>] si2168_sleep+0x2d/0xd0 [si2168] [6363904.336250] RSP <ffff880002a0bd98> [6363904.336250] CR2: 00000000000000c0 [6363904.336250] ---[ end trace c07ed01cdcc826c8 ]--- [6363904.664803] usb 1-5: dvb_frontend_stop: warning: thread ffff880002f8cb00 won't exit -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
