| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <b3417c2c-613b-8ef6-2e2d-6e2cf9a5d5fd@gmail.com>
Date: Wed, 18 Aug 2021 00:00:15 +0200
From: Ferry Toth <fntoth@...il.com>
To: Felipe Balbi <balbi@...nel.org>
Cc: Wesley Cheng <wcheng@...eaurora.org>, gregkh@...uxfoundation.org,
robh+dt@...nel.org, agross@...nel.org, bjorn.andersson@...aro.org,
frowand.list@...il.com, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-msm@...r.kernel.org, jackp@...eaurora.org,
heikki.krogerus@...ux.intel.com, andy.shevchenko@...il.com,
Ruslan Bilovol <ruslan.bilovol@...il.com>
Subject: Re: [PATCH v10 0/6] Re-introduce TX FIFO resize for larger EP
bursting
Hi,
Op 16-08-2021 om 07:18 schreef Felipe Balbi:
> Hi,
>
> Ferry Toth <fntoth@...il.com> writes:
>>> Ferry Toth <fntoth@...il.com> writes:
>>>>>>> Ferry Toth <fntoth@...il.com> writes:
>>>>>>>>>>>> Hardware name: Intel Corporation Merrifield/BODEGA BAY, BIOS 542
>>>>>>>>>>>> 2015.01.21:18.19.48
>>>>>>>>>>>> RIP: 0010:0x500000000
>>>>>>>>>>>> Code: Unable to access opcode bytes at RIP 0x4ffffffd6.
>>>>>>>>>>>> RSP: 0018:ffffa4d00045fc28 EFLAGS: 00010046
>>>>>>>>>>>> RAX: 0000000500000000 RBX: ffff8cd546aed200 RCX: 0000000000000000
>>>>>>>>>>>> RDX: 0000000000000000 RSI: ffff8cd547bfcae0 RDI: ffff8cd546aed200
>>>>>>>>>>>> RBP: ffff8cd547bfcae0 R08: 0000000000000000 R09: 0000000000000001
>>>>>>>>>>>> R10: ffff8cd541fd28c0 R11: 0000000000000000 R12: ffff8cd547342828
>>>>>>>>>>>> R13: ffff8cd546aed248 R14: 0000000000000000 R15: ffff8cd548b1d000
>>>>>>>>>>>> FS: 0000000000000000(0000) GS:ffff8cd57e200000(0000) knlGS:0000000000000000
>>>>>>>>>>>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>>>>>>>>>> CR2: 0000000500000000 CR3: 000000000311e000 CR4: 00000000001006f0
>>>>>>>>>>>> Call Trace:
>>>>>>>>>>>> ? dwc3_remove_requests.constprop.0+0x14d/0x170
>>>>>>>>>>>> ? __dwc3_gadget_ep_disable+0x7a/0x160
>>>>>>>>>>>> ? dwc3_gadget_ep_disable+0x3d/0xd0
>>>>>>>>>>>> ? usb_ep_disable+0x1c/0x
>>>>>>>>>>>> ? u_audio_stop_capture+0x79/0x120 [u_audio]
>>>>>>>>>>>> ? afunc_set_alt+0x73/0x80 [usb_f_uac2]
>>>>> So this is triggered by a SetInterface request...
>>>>>
>>>>>>>>>>>> ? composite_setup+0x224/0x1b90 [libcomposite]
>>>>>>>>>>>> ? __dwc3_gadget_kick_transfer+0x160/0x400
>>>>>>>>>>>> ? dwc3_gadget_ep_queue+0xf3/0x1a0
>>>>>>>>>>>> ? configfs_composite_setup+0x6b/0x90 [libcomposite]
>>>>>>>>>>>> ? configfs_composite_setup+0x6b/0x90 [libcomposite]
>>>>>>>>>>>> ? dwc3_ep0_interrupt+0x459/0xa40
>>>>>>>>>>>> ? dwc3_thread_interrupt+0x8ee/0xf40
>>>>>>>>>>>> ? __schedule+0x235/0x6c0
>>>>>>>>>>>> ? disable_irq_nosync+0x10/0x10
>>>>>>>>>>>> ? irq_thread_fn+0x1b/0x60
>>>>>>>>>>>> ? irq_thread+0xc0/0x160
>>>>>>>>>>>> ? irq_thread_check_affinity+0x70/0x70
>>>>>>>>>>>> ? irq_forced_thread_fn+0x70/0x70
>>>>>>>>>>>> ? kthread+0x122/0x140
>>>>>>>>>>>> ? set_kthread_struct+0x40/0x40
>>>>>>>>>>>> ? ret_from_fork+0x22/0x30
>>>>>>>>>>> Do you mind enabling dwc3 traces and collecting them? Trying to figure
>>>>>>>>>>> out how we got here.
>>>>>>>>>>>
>>>>>>>>>> I'll try if I can get the same error by booting with USB in host mode
>>>>>>>>>> and then switch to device mode. If so I can enable traces and collect as
>>>>>>>>>> you explained me before.
>>>>>>>>>>
>>>>>>>>>> I'll try before monday, as then I fly for a holiday and will not be
>>>>>>>>>> available before rc5.
>>>>>>>>> you can enable all of those with kernel cmdline :-)
>>>>>>>>>
>>>>>>>>> https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
>>>>>>>>>
>>>>>>>>> you need ftrace_dump_on_oops=1 and also need the correct options on
>>>>>>>>> trace_buf_size and trace_event.
>>>>>>>>>
>>>>>>>> On Edison-Arduino I have a switch to go to device mode, after which
>>>>>>>> udev triggers a script configure gadgets through configfs.
>>>>>>>>
>>>>>>>> I tried to log following these instructions:
>>>>>>>>
>>>>>>>> https://www.kernel.org/doc/html/latest/driver-api/usb/dwc3.html#reporting-bugs <https://www.kernel.org/doc/html/latest/driver-api/usb/dwc3.html#reporting-bugs>
>>>>>>>>
>>>>>>>> Unfortunately the kernel crashes so badly I can not get to the ` cp
>>>>>>>> /t/trace /root/trace.txt` line (after a while the watchdog kicks).
>>>>>>>>
>>>>>>>> What to do next?
>>>>>>> Pass ftrace_dump_on_oops to kernel cmdline.
>>>>>>>
>>>>>> No sure if I did this right, on oops everything is pushed to console
>>>>>> (115k2 serial), I hope nothing essential is lost.
>>>>>>
>>>>>> I copied the screen buffer to file see attached.
>>>>> Thank you, I bet it took quite a some time :-) Anyway, looking at
>>>>> the logs around Set Interface requests, we can track every endpoint
>>>>> that's disabled. I'll take a guess and assume we're failing at the last
>>>>> Set Interface, that means we should have something odd with ep6in, but
>>>>> everything looks fine in the trace output:
>>>>>
>>>>> [ 75.823107] irq/14-d-596 0d... 42789194us : dwc3_gadget_ep_enable: ep6in: mps 192/346 streams 16 burst 0 ring 0/0 flags E:swbp:<
>>>>> [ 75.835472] irq/14-d-596 0d... 42789198us : dwc3_alloc_request: ep6in: req 0000000002c71409 length 0/0 zsI ==> 0
>>>>> [ 75.846416] irq/14-d-596 0d... 42789202us : dwc3_ep_queue: ep6in: req 0000000002c71409 length 0/192 zsI ==> -115
>>>>> [ 75.857360] irq/14-d-596 0d... 42789204us : dwc3_alloc_request: ep6in: req 00000000a324f5d0 length 0/0 zsI ==> 0
>>>>> [ 75.868301] irq/14-d-596 0d... 42789206us : dwc3_ep_queue: ep6in: req 00000000a324f5d0 length 0/192 zsI ==> -115
>>>>> [ 75.879244] irq/14-d-596 0d... 42789209us : dwc3_event: event (000020c2): ep0in: Transfer Not Ready [0] (Not Active) [Status Phase]
>>>>> [ 75.891880] irq/14-d-596 0d... 42789211us : dwc3_prepare_trb: ep0in: trb 000000004c0ae319 (E0:D0) buf 000000001bded000 size 0 ctrl 00000c33 (HLcs:SC:status2)
>>>>> [ 75.989131] irq/14-d-596 0d... 42789224us : dwc3_gadget_ep_cmd: ep0in: cmd 'Start Transfer' [406] params 00000000 1bded000 00000000 --> status: Successful
>>>>> [ 76.096261] irq/14-d-596 0d... 42789272us : dwc3_event: event (0000c042): ep0in: Transfer Complete (sIL) [Status Phase]
>>>>> [ 76.107834] irq/14-d-596 0d... 42789275us : dwc3_complete_trb: ep0out: trb 000000004c0ae319 (E0:D0) buf 000000001bded000 size 0 ctrl 00000c32 (hLcs:SC:status2)
>>>>> [ 76.122944] irq/14-d-596 0d... 42789277us : dwc3_gadget_giveback: ep0out: req 00000000cb1bd3cd length 0/0 zsI ==> 0
>>>>> [ 76.134160] irq/14-d-596 0d... 42789280us : dwc3_prepare_trb: ep0out: trb 000000004c0ae319 (E0:D0) buf 000000001bded000 size 8 ctrl 00000c23 (HLcs:SC:setup)
>>>>> [ 76.231322] irq/14-d-596 0d... 42789292us : dwc3_gadget_ep_cmd: ep0out: cmd 'Start Transfer' [406] params 00000000 1bded000 00000000 --> status: Successful
>>>>> [ 76.297418] kworker/-23 0d... 42789670us : dwc3_ep_queue: ep3in: req 0000000029586135 length 0/96 ZsI ==> -115
>>>>> [ 76.308278] kworker/-23 0d... 42789695us : dwc3_prepare_trb: ep3in: trb 00000000b81213d6 (E1:D0) buf 0000000003b7a800 size 96 ctrl 00000811 (Hlcs:sC:normal)
>>>>> [ 76.395294] kworker/-23 0d... 42789707us : dwc3_gadget_ep_cmd: ep3in: cmd 'Update Transfer' [60007] params 00000000 00000000 00000000 --> status: Successful
>>>>> [ 76.471900] irq/14-d-596 0d... 42789842us : dwc3_event: event (0000c040): ep0out: Transfer Complete (sIL) [Setup Phase]
>>>>> [ 76.489308] irq/14-d-596 0d... 42789845us : dwc3_ctrl_req: Set Interface(Intf = 5, Alt.Setting = 0)
>>>>> [ 76.505650] irq/14-d-596 0d... 42789851us : dwc3_ep_dequeue: ep6in: req 0000000002c71409 length 0/192 zsI ==> -115
>>>>> [ 76.523315] irq/14-d-596 0d... 42789854us : dwc3_gadget_giveback: ep6in: req 0000000002c71409 length 0/192 zsI ==> -104
>>>>> [ 76.541427] irq/14-d-596 0d... 42789857us : dwc3_free_request: ep6in: req 0000000002c71409 length 0/192 zsI ==> -104
>>>>> [ 76.559267] irq/14-d-596 0d... 42789859us : dwc3_ep_dequeue: ep6in: req 00000000a324f5d0 length 0/192 zsI ==> -115
>>>>> [ 76.576937] irq/14-d-596 0d... 42789861us : dwc3_gadget_giveback: ep6in: req 00000000a324f5d0 length 0/192 zsI ==> -104
>>>>> [ 76.595046] irq/14-d-596 0d... 42789862us : dwc3_free_request: ep6in: req 00000000a324f5d0 length 0/192 zsI ==> -104
>>>>> [ 76.612892] irq/14-d-596 0d... 42789865us : dwc3_gadget_ep_disable: ep6in: mps 192/346 streams 16 burst 0 ring 0/0 flags E:swbp:<
>>>>> [ 76.665535] irq/14-d-596 0d... 42789873us : dwc3_event: event (000020c2): ep0in: Transfer Not Ready [0] (Not Active) [Status Phase]
>>>>> [ 76.684716] irq/14-d-596 0d... 42789875us : dwc3_prepare_trb: ep0in: trb 000000004c0ae319 (E0:D0) buf 000000001bded000 size 0 ctrl 00000c33 (HLcs:SC:status2)
>>>>> [ 76.819195] irq/14-d-596 0d... 42789886us : dwc3_gadget_ep_cmd: ep0in: cmd 'Start Transfer' [406] params 00000000 1bded000 00000000 --> status: Successful
>>>>> [ 76.926324] irq/14-d-596 0d... 42789930us : dwc3_event: event (0000c042): ep0in: Transfer Complete (sIL) [Status Phase]
>>>>> [ 76.937892] irq/14-d-596 0d... 42789933us : dwc3_complete_trb: ep0out: trb 000000004c0ae319 (E0:D0) buf 000000001bded000 size 0 ctrl 00000c32 (hLcs:SC:status2)
>>>>> [ 76.953003] irq/14-d-596 0d... 42789935us : dwc3_gadget_giveback: ep0out: req 00000000cb1bd3cd length 0/0 zsI ==> 0
>>>>> [ 76.964217] irq/14-d-596 0d... 42789938us : dwc3_prepare_trb: ep0out: trb 000000004c0ae319 (E0:D0) buf 000000001bded000 size 8 ctrl 00000c23 (HLcs:SC:setup)
>>>>> [ 77.061379] irq/14-d-596 0d... 42789950us : dwc3_gadget_ep_cmd: ep0out: cmd 'Start Transfer' [406] params 00000000 1bded000 00000000 --> status: Successful
>>>>> [ 77.168595] irq/14-d-596 0d... 42790509us : dwc3_event: event (0000c040): ep0out: Transfer Complete (sIL) [Setup Phase]
>>>>> [ 77.180159] irq/14-d-596 0d... 42790512us : dwc3_ctrl_req: Get String Descriptor(Index = 18, Length = 255)
>>>>> [ 77.190578] irq/14-d-596 0d... 42790537us : dwc3_prepare_trb: ep0in: trb 000000004c0ae319 (E0:D0) buf 0000000003b68000 size 36 ctrl 00000c53 (HLcs:SC:data)
>>>>> [ 77.287648] irq/14-d-596 0d... 42790550us : dwc3_gadget_ep_cmd: ep0in: cmd 'Start Transfer' [406] params 00000000 1bded000 00000000 --> status: Successful
>>>>> [ 77.333107] irq/14-d-596 0d... 42790557us : dwc3_event: event (000010c2): ep0in: Transfer Not Ready [0] (Not Active) [Data Phase]
>>>>> [ 77.407223] irq/14-d-596 0d... 42790575us : dwc3_event: event (000090c2): ep0in: Transfer Not Ready [0] (Active) [Data Phase]
>>>>> [ 77.480985] irq/14-d-596 0d... 42790588us : dwc3_event: event (0000c042): ep0in: Transfer Complete (sIL) [Data Phase]
>>>>> [ 77.492376] irq/14-d-596 0d... 42790590us : dwc3_complete_trb: ep0out: trb 000000004c0ae319 (E0:D0) buf 0000000003b68000 size 0 ctrl 00000c52 (hLcs:SC:data)
>>>>> [ 77.507221] irq/14-d-596 0d... 42790595us : dwc3_gadget_giveback: ep0out: req 00000000cb1bd3cd length 36/36 ZsI ==> 0
>>>>> [ 77.518609] irq/14-d-596 0d... 42790597us : dwc3_event: event (000020c0): ep0out: Transfer Not Ready [0] (Not Active) [Status Phase]
>>>>> [ 77.531332] irq/14-d-596 0d... 42790598us : dwc3_prepare_trb: ep0out: trb 000000004c0ae319 (E0:D0) buf 000000001bded000 size 0 ctrl 00000c43 (HLcs:SC:status3)
>>>>> [ 77.628669] irq/14-d-596 0d... 42790609us : dwc3_gadget_ep_cmd: ep0out: cmd 'Start Transfer' [406] params 00000000 1bded000 00000000 --> status: Successful
>>>>>
>>>>> Do you mind adding a few prints in dwc3_remove_requests to tell us which
>>>>> endpoint is being processed? Then we'll know for sure which one caused
>>>>> the crash.
>>>>>
>>>> I wouldn't mind but am leaving on a holiday, won't have time until 6 aug.
>>> not a problem, we'll still be here when you're back :-)
>> Well, let's go then :-)
>>
>> To get back in the mood I have retested 5.13.0, 5.14.0-rc1, 5.14.0-rc2
>> and 5.14.0-rc5.
>>
>> I find that 5.13.0 works fine, and the issue starts from 5.14.0-rc1.
> That's great finding. We have a bisection point. There are a total of
> 13764 commits between v5.13 and v5.14-rc1
>
> $ git rev-list --count v5.13..v5.14-rc1
> 13764
>
> git bisect should find the offending commit in at most 14 tries. That's
> not too bad.
I correctly guesstimated that the problem got introduced by the usb
merge 79160a60
"Merge tag 'usb-5.14-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb"
116 commits(7 bisects).
24f779dac8f3efb9629adc0e486914d93dc45517 is the first bad commit
"usb: gadget: f_uac2/u_audio: add feedback endpoint support"
Ruslan's 3 patches are related to each other so I reverted all three
24f779da...e89bb428 and applied the reverts to rc1.
I can confirm this indeed resolves the problem in rc1.
Is late now, tomorrow evening I will apply the reverts to rc6.
>> With 5.14.0-rc5 the problem seems worse (or different?), and just
>> disabling uac2 gadget does not prevent the crash. Even disabling gser
>> and mass_storage.usb0 as well there is still a crash.
>>
>> Now I'm not sure how to proceed. Bisect rc1? Or focus on rc5 (rc6?)?
> I'd first bisect between 5.13 and v5.14-rc1. Once you find the offending
> commit, verify if reverting that on -rc1 works, then verify if reverting
> on -rc5 also works :-)
>
Powered by blists - more mailing lists