Hi, Ferry Toth <fntoth@xxxxxxxxx> writes: >> Ferry Toth <fntoth@xxxxxxxxx> writes: >>>>>> Ferry Toth <fntoth@xxxxxxxxx> 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. > 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 :-) -- balbi
