Hi, This oops has appeared for my PCTV T2 290e adapter when I switched to the 4.9.x kernel. It does not happen with the 4.8.x kernel. I believe the problem is that "priv" is NULL in cxd2820r_gpio(). Jan 13 11:19:45 endgame kernel: em28174 #0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x1eb936d2 Jan 13 11:19:45 endgame kernel: em28174 #0: EEPROM info: Jan 13 11:19:45 endgame kernel: em28174 #0: #011microcode start address = 0x0004, boot configuration = 0x01 Jan 13 11:19:45 endgame kernel: em28174 #0: #011No audio on board. Jan 13 11:19:45 endgame kernel: em28174 #0: #011500mA max power Jan 13 11:19:45 endgame kernel: em28174 #0: #011Table at offset 0x39, strings=0x1aa0, 0x14ba, 0x1ace Jan 13 11:19:45 endgame kernel: em28174 #0: Identified as PCTV nanoStick T2 290e (card=78) Jan 13 11:19:45 endgame kernel: em28174 #0: dvb set to isoc mode. Jan 13 11:19:45 endgame kernel: usbcore: registered new interface driver em28xx Jan 13 11:19:45 endgame kernel: em28174 #0: Binding DVB extension Jan 13 11:19:45 endgame kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000549 Jan 13 11:19:45 endgame kernel: IP: [<ffffffff811b9a28>] memcmp+0xb/0x1d Jan 13 11:19:47 endgame kernel: PGD 0 Jan 13 11:19:47 endgame kernel: Jan 13 11:19:47 endgame kernel: Oops: 0000 [#1] PREEMPT SMP Jan 13 11:19:47 endgame kernel: Modules linked in: cxd2820r em28xx_dvb(+) dvb_core btbcm snd_rawmidi snd_hda_core joydev coretemp btintel snd_seq kvm_intel snd_seq_device bluetooth kvm snd_pcm rfkill snd_hrtimer em28xx tveeprom snd_timer v4l2_common videodev irqbypass iTCO_wdt psmouse mxm_wmi pcspkr lpc_ich snd r8169 i7core_edac i2c_i801 i2c_smbus button wmi mfd_core mii edac_core acpi_cpufreq soundcore processor binfmt_misc nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc ip_tables x_tables ext4 crc16 jbd2 mbcache sr_mod cdrom sd_mod usbhid radeon i2c_algo_bit uhci_hcd crc32c_intel ehci_pci drm_kms_helper serio_raw ehci_hcd ahci xhci_pci cfbfillrect syscopyarea cfbimgblt sysfillrect sysimgblt fb_sys_fops pata_jmicron libahci cfbcopyarea libata firewire_ohci ttm scsi_mod xhci_hcd firewire_core crc_itu_t drm Jan 13 11:19:47 endgame kernel: usbcore usb_common ipv6 Jan 13 11:19:47 endgame kernel: CPU: 5 PID: 639 Comm: modprobe Tainted: G I 4.9.2 #2 Jan 13 11:19:47 endgame kernel: Hardware name: Gigabyte Technology Co., Ltd. EX58-UD3R/EX58-UD3R, BIOS FB 05/04/2009 Jan 13 11:19:47 endgame kernel: task: ffff8801c34acec0 task.stack: ffffc900004f8000 Jan 13 11:19:47 endgame kernel: RIP: 0010:[<ffffffff811b9a28>] [<ffffffff811b9a28>] memcmp+0xb/0x1d Jan 13 11:19:47 endgame kernel: RSP: 0018:ffffc900004fb888 EFLAGS: 00010206 Jan 13 11:19:47 endgame kernel: RAX: 0000000000000001 RBX: ffff8801c1ef2800 RCX: 0000000000000000 Jan 13 11:19:47 endgame kernel: RDX: 0000000000000003 RSI: 0000000000000549 RDI: ffffc900004fb8b9 Jan 13 11:19:47 endgame kernel: RBP: 0000000000000000 R08: ffff8801c80fc8c0 R09: 0000000000000000 Jan 13 11:19:47 endgame kernel: R10: ffffc900004fb708 R11: 0000000000018ca0 R12: 0000000000000549 Jan 13 11:19:47 endgame kernel: R13: ffffc900004fb8b9 R14: ffff8801c1ef2828 R15: ffffc900004fba68 Jan 13 11:19:47 endgame kernel: FS: 00007f3c74c195c0(0000) GS:ffff8801cfd40000(0000) knlGS:0000000000000000 Jan 13 11:19:47 endgame kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 13 11:19:47 endgame kernel: CR2: 0000000000000549 CR3: 00000001c35a7000 CR4: 00000000000006e0 Jan 13 11:19:47 endgame kernel: Stack: Jan 13 11:19:47 endgame kernel: ffffffffa04f344c ffff8801c1ef2800 ffff8801c4bef000 0000000000000000 Jan 13 11:19:47 endgame kernel: ffff8801c324bd64 ffffffffa04f3662 000000e1000001ed ffffffffa04f5280 Jan 13 11:19:47 endgame kernel: ffff8801c4bef020 ffff8801c4bef000 ffff8801c4bef004 ffffffffa04f3514 Jan 13 11:19:47 endgame kernel: Call Trace: Jan 13 11:19:47 endgame kernel: [<ffffffffa04f344c>] ? cxd2820r_gpio+0x27/0xef [cxd2820r] Jan 13 11:19:47 endgame kernel: [<ffffffffa04f3662>] ? cxd2820r_probe+0x14e/0x1df [cxd2820r] Jan 13 11:19:47 endgame kernel: [<ffffffffa04f3514>] ? cxd2820r_gpio+0xef/0xef [cxd2820r] Jan 13 11:19:47 endgame kernel: [<ffffffff8128ebda>] ? i2c_device_probe+0xc6/0xfa Jan 13 11:19:47 endgame kernel: [<ffffffff8126946e>] ? driver_probe_device+0x10b/0x249 Jan 13 11:19:47 endgame kernel: [<ffffffff81269655>] ? driver_allows_async_probing+0x24/0x24 Jan 13 11:19:47 endgame kernel: [<ffffffff81267e19>] ? bus_for_each_drv+0x6c/0x7b Jan 13 11:19:47 endgame kernel: [<ffffffff812692ec>] ? __device_attach+0x96/0xf5 Jan 13 11:19:47 endgame kernel: [<ffffffff81268a04>] ? bus_probe_device+0x28/0x84 Jan 13 11:19:47 endgame kernel: [<ffffffff8126709a>] ? device_add+0x2ad/0x51e Jan 13 11:19:47 endgame kernel: [<ffffffff813618dd>] ? _raw_spin_unlock_irqrestore+0xf/0x20 Jan 13 11:19:47 endgame kernel: [<ffffffff81290b49>] ? i2c_new_device+0x172/0x1c9 Jan 13 11:19:47 endgame kernel: [<ffffffffa04f313e>] ? cxd2820r_attach+0x8a/0xc0 [cxd2820r] Jan 13 11:19:47 endgame kernel: [<ffffffffa058d461>] ? em28xx_dvb_init.part.3+0xa01/0x2d20 [em28xx_dvb] Jan 13 11:19:47 endgame kernel: [<ffffffff8105761d>] ? check_preempt_curr+0x41/0x5e Jan 13 11:19:47 endgame kernel: [<ffffffff81057647>] ? ttwu_do_wakeup+0xd/0x81 Jan 13 11:19:47 endgame kernel: [<ffffffff813618dd>] ? _raw_spin_unlock_irqrestore+0xf/0x20 Jan 13 11:19:47 endgame kernel: [<ffffffff8105831c>] ? try_to_wake_up+0x1f7/0x208 Jan 13 11:19:47 endgame kernel: [<ffffffff81069b2e>] ? __wake_up_common+0x47/0x73 Jan 13 11:19:47 endgame kernel: [<ffffffff813618dd>] ? _raw_spin_unlock_irqrestore+0xf/0x20 Jan 13 11:19:47 endgame kernel: [<ffffffff811424cb>] ? ep_poll_callback+0x151/0x17a Jan 13 11:19:47 endgame kernel: [<ffffffff81069b2e>] ? __wake_up_common+0x47/0x73 Jan 13 11:19:47 endgame kernel: [<ffffffff81056343>] ? preempt_count_add+0x72/0x91 Jan 13 11:19:47 endgame kernel: [<ffffffff8135fdc5>] ? __mutex_lock_slowpath+0x277/0x29c Jan 13 11:19:47 endgame kernel: [<ffffffffa052007a>] ? em28xx_register_extension+0x51/0x82 [em28xx] Jan 13 11:19:47 endgame kernel: [<ffffffffa007d000>] ? 0xffffffffa007d000 Jan 13 11:19:47 endgame kernel: [<ffffffff81000440>] ? do_one_initcall+0x93/0x124 Jan 13 11:19:47 endgame kernel: [<ffffffff810c0b36>] ? do_init_module+0x51/0x1d3 Jan 13 11:19:47 endgame kernel: [<ffffffff81096b5a>] ? load_module+0x19ef/0x1f1d Jan 13 11:19:47 endgame kernel: [<ffffffff8110dd2c>] ? __vfs_read+0xc6/0xe9 Jan 13 11:19:47 endgame kernel: [<ffffffff81093db5>] ? show_coresize+0x1c/0x1c Jan 13 11:19:47 endgame kernel: [<ffffffff810971e2>] ? SyS_finit_module+0x78/0x83 Jan 13 11:19:47 endgame kernel: [<ffffffff810971e2>] ? SyS_finit_module+0x78/0x83 Jan 13 11:19:47 endgame kernel: [<ffffffff810011ae>] ? do_syscall_64+0x49/0x98 Jan 13 11:19:47 endgame kernel: [<ffffffff81361d86>] ? entry_SYSCALL64_slow_path+0x25/0x25 Jan 13 11:19:47 endgame kernel: Code: 8b 3c c1 48 85 ff 74 10 4c 89 d6 e8 03 fe ff ff 85 c0 74 09 ff c1 eb df b9 ea ff ff ff 89 c8 c3 31 c9 48 39 ca 74 13 0f b6 04 0f <44> 0f b6 04 0e 48 ff c1 44 29 c0 74 ea eb 02 31 c0 c3 48 01 fa Jan 13 11:19:47 endgame kernel: RIP [<ffffffff811b9a28>] memcmp+0xb/0x1d Jan 13 11:19:47 endgame kernel: RSP <ffffc900004fb888> Jan 13 11:19:48 endgame kernel: CR2: 0000000000000549 Jan 13 11:19:48 endgame kernel: ---[ end trace 2104ca820a3ff414 ]--- Cheers, Chris -- 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
