Message-ID: <20160318221215.GA1129@kroah.com>
Date:	Fri, 18 Mar 2016 15:12:15 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: [GIT PULL] USB driver patches for 4.6-rc1

On Fri, Mar 18, 2016 at 02:58:27PM -0700, Linus Torvalds wrote:
> On Fri, Mar 18, 2016 at 2:43 PM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > Something in this - or possibly the tty pull, but that doesn't sound
> > very likely - has killed my USB keyboard on my desktop.
> 
> Yeah, the bisect is now solidly in the usb part.
> 
> The machine has
> 
> 00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI
> Controller (rev 31)
> 03:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller
> 
> and the keyboard and mouse are on
> 
> /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
> 
> which seems to be that ASMedia 3.1 controller.
> 
> In case that gives anybody a clue while I continue bisecting.

Hm, your tree as of this morning works just fine for me right now (am
typing this from a USB keyboard), but I have an older host controller:
	00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 04)


I do see an oops in the snd_usb_audio driver that I didn't notice
before:


[  +0.002298] input: Schiit Audio USB Modi Device as /devices/pci0000:00/0000:00:14.0/usb2/2-10/2-10.1/2-10.1:1.2/0003:0D8C:1319.0001/input/input17
[  +0.000056] hid-generic 0003:0D8C:1319.0001: input,hidraw0: USB HID v1.00 Device [Schiit Audio USB Modi Device] on usb-0000:00:14.0-10.1/input2
[  +0.008749] BUG: unable to handle kernel NULL pointer dereference at 0000000000000014
[  +0.001151] IP: [<ffffffffc0e79921>] usb_audio_probe+0x1e1/0x8f0 [snd_usb_audio]
[  +0.001142] PGD 0 
[  +0.001114] Oops: 0000 [#1] PREEMPT SMP 
[  +0.001115] Modules linked in: snd_usb_audio(+) hid_generic snd_usbmidi_lib usbhid snd_rawmidi snd_seq_device hid media arc4 fuse btusb btrtl btbcm btintel bluetooth rt2800usb rt2x00usb rt2800lib rt2x00lib mac80211 crc_ccitt cfg80211 rfkill nls_cp437 vfat fat iTCO_wdt iTCO_vendor_support mxm_wmi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crct10dif_common crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd psmouse serio_raw pcspkr firewire_ohci firewire_core crc_itu_t xhci_pci ehci_pci xhci_hcd ehci_hcd mei_me usbcore mei lpc_ich mfd_core usb_common wmi evdev ip_tables x_tables
[  +0.004079] CPU: 4 PID: 615 Comm: systemd-udevd Not tainted 4.6.0-rc1+ #103
[  +0.001382] Hardware name:                  /        , BIOS KLZ8711D.86A.0457.2015.0713.1319 07/13/2015
[  +0.001387] task: ffff880098ec0e00 ti: ffff880251920000 task.ti: ffff880251920000
[  +0.001417] RIP: 0010:[<ffffffffc0e79921>]  [<ffffffffc0e79921>] usb_audio_probe+0x1e1/0x8f0 [snd_usb_audio]
[  +0.001414] RSP: 0018:ffff880251923af0  EFLAGS: 00010246
[  +0.001409] RAX: 0000000000000000 RBX: ffff88024d602000 RCX: 0000000000000000
[  +0.001404] RDX: ffff880254e0b340 RSI: ffff8802559b99f8 RDI: ffffffff82181030
[  +0.001413] RBP: ffff880251923b50 R08: 0000000000019d00 R09: ffffffff81385837
[  +0.001431] R10: ffffea0009461200 R11: ffff880253b3fe72 R12: 0000000000000000
[  +0.001411] R13: 0000000000000000 R14: 0000000000000001 R15: ffff88025338c212
[  +0.001436] FS:  00007f7a8db567c0(0000) GS:ffff88025fb00000(0000) knlGS:0000000000000000
[  +0.001431] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  +0.001445] CR2: 0000000000000014 CR3: 0000000251854000 CR4: 00000000001406e0
[  +0.001451] Stack:
[  +0.001433]  ffff880253302e88 ffff88024d602054 ffff88009879d000 ffff880253302e88
[  +0.001480]  ffff880255f7e000 386430425355d030 ff00393133313a63 ffff8800984f4098
[  +0.001466]  ffff8800984f4000 ffffffffc0e95728 ffff88009879d030 ffffffffc0e955a0
[  +0.001497] Call Trace:
[  +0.001295]  [<ffffffffc0067cfd>] usb_probe_interface+0x1bd/0x300 [usbcore]
[  +0.001427]  [<ffffffff815987e9>] driver_probe_device+0x249/0x450
[  +0.001400]  [<ffffffff81598a74>] __driver_attach+0x84/0x90
[  +0.001398]  [<ffffffff815989f0>] ? driver_probe_device+0x450/0x450
[  +0.001417]  [<ffffffff815963e4>] bus_for_each_dev+0x64/0xa0
[  +0.001369]  [<ffffffff81597ede>] driver_attach+0x1e/0x20
[  +0.001396]  [<ffffffff815979ab>] bus_add_driver+0x1eb/0x280
[  +0.001365]  [<ffffffff81599390>] driver_register+0x60/0xe0
[  +0.001369]  [<ffffffffc0066834>] usb_register_driver+0x84/0x140 [usbcore]
[  +0.001422]  [<ffffffffc0e9d000>] ? 0xffffffffc0e9d000
[  +0.001370]  [<ffffffffc0e9d01e>] usb_audio_driver_init+0x1e/0x20 [snd_usb_audio]
[  +0.001472]  [<ffffffff8100211b>] do_one_initcall+0xab/0x1d0
[  +0.001547]  [<ffffffff8115e732>] do_init_module+0x5f/0x1cd
[  +0.001469]  [<ffffffff810f9ec8>] load_module+0x1368/0x1510
[  +0.001542]  [<ffffffff810f75d0>] ? symbol_put_addr+0x50/0x50
[  +0.001468]  [<ffffffff810fa2a8>] SyS_finit_module+0xc8/0xf0
[  +0.001451]  [<ffffffff81003c6e>] do_syscall_64+0x5e/0xc0
[  +0.001538]  [<ffffffff817fb425>] entry_SYSCALL64_slow_path+0x25/0x25
[  +0.001397] Code: f8 01 00 44 89 e6 48 89 df e8 dc 73 00 00 85 c0 89 c1 0f 88 99 00 00 00 48 8b 7b 10 e8 c9 0b 80 c0 85 c0 89 c1 0f 88 86 00 00 00 <41> 80 7d 14 00 0f 85 90 04 00 00 48 63 03 48 89 1c c5 40 90 e9 
[  +0.001513] RIP  [<ffffffffc0e79921>] usb_audio_probe+0x1e1/0x8f0 [snd_usb_audio]
[  +0.001468]  RSP <ffff880251923af0>
[  +0.001576] CR2: 0000000000000014
[  +0.010610] ---[ end trace c9cdd61401b8f1d9 ]---

But my keyboard still works :)

The results of bisection will be interesting to see...

thanks,

greg k-h

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