>Synopsis: Kernel panic when writing to /dev/audio >Category: Kernel >Environment: System : OpenBSD 6.2 Details : OpenBSD 6.2-current (GENERIC) #1: Sun Feb 18 16:46:14 CET 2018 r...@foo.fritz.box:/usr/src/sys/arch/arm64/compile/GENERIC
Architecture: OpenBSD.arm64 Machine : arm64 >Description: Kernel panic when writing to /dev/audio (USB audio) >How-To-Repeat: cd /dev; cat urandom > audio, or use sox' play(1) command to play any mp3 audio >Fix: None, i am not familiar with kernel debugging/fixing SENDBUG: dmesg, pcidump, acpidump and usbdevs are attached. SENDBUG: Feel free to delete or use the -D flag if they contain sensitive information. dmesg: OpenBSD 6.2-current (GENERIC) #1: Sun Feb 18 16:46:14 CET 2018 r...@foo.fritz.box:/usr/src/sys/arch/arm64/compile/GENERIC real mem = 964767744 (920MB) avail mem = 908701696 (866MB) mainbus0 at root: Raspberry Pi 3 Model B Rev 1.2 cpu0 at mainbus0 mpidr 0: ARM Cortex-A53 r0p4 efi0 at mainbus0: UEFI 2.0.5 efi0: Das U-boot rev 0x0 simplefb0 at mainbus0: 656x416 wsdisplay0 at simplefb0 mux 1 wsdisplay0: screen 0-5 added (std, vt100 emulation) simplebus0 at mainbus0: "soc" syscon0 at simplebus0: "syscon" bcmintc0 at simplebus0 bcmdog0 at simplebus0 pluart0 at simplebus0 bcmaux0 at simplebus0 com0 at simplebus0: ns16550, no working fifo com0: console dwctwo0 at simplebus0 agtimer0 at simplebus0: tick rate 19200 KHz simplebus1 at mainbus0: "clocks" usb0 at dwctwo0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "Broadcom DWC2 root hub" rev 2.00/1.00 addr 1 uhub1 at uhub0 port 1 configuration 1 interface 0 "Standard Microsystems product 0x9514" rev 2.00/2.00 addr 2 smsc0 at uhub1 port 1 configuration 1 interface 0 "Standard Microsystems SMSC9512/14" rev 2.00/2.00 addr 3 smsc0: address b8:27:eb:8d:8e:a8 ukphy0 at smsc0 phy 1: Generic IEEE 802.3u media interface, rev. 3: OUI 0x0001f0, model 0x000c uaudio0 at uhub1 port 3 configuration 1 interface 0 "ABC C-Media USB Audio Device" rev 1.10/1.00 addr 4 uaudio0: audio rev 1.00, 8 mixer controls audio0 at uaudio0 uhidev0 at uhub1 port 3 configuration 1 interface 3 "ABC C-Media USB Audio Device" rev 1.10/1.00 addr 4 uhidev0: iclass 3/0 uhid0 at uhidev0: input=4, output=4, feature=0 umass0 at uhub1 port 4 configuration 1 interface 0 "JetFlash Mass Storage Device" rev 2.10/11.00 addr 5 umass0: using SCSI over Bulk-Only scsibus0 at umass0: 2 targets, initiator 0 sd0 at scsibus0 targ 1 lun 0: <JetFlash, Transcend 16GB, 1100> SCSI4 0/direct removable serial.856410005Y2I6Q9SV6N0 sd0: 15064MB, 512 bytes/sector, 30851072 sectors vscsi0 at root scsibus1 at vscsi0: 256 targets softraid0 at root scsibus2 at softraid0: 256 targets bootfile: sd0a:/bsd boot device: sd0 root on sd0a (24d0157b87573f8c.a) swap on sd0b dump on sd0b WARNING: / was not properly unmounted WARNING: CHECK AND RESET THE DATE! usbdevs: Controller /dev/usb0: addr 1: high speed, self powered, config 1, DWC2 root hub(0x0000), Broadcom(0x0000), rev 1.00 port 1 addr 2: high speed, self powered, config 1, product 0x9514(0x9514), Standard Microsystems(0x0424), rev 2.00 port 1 addr 3: high speed, self powered, config 1, SMSC9512/14(0xec00), Standard Microsystems(0x0424), rev 2.00 port 2 powered port 3 addr 4: full speed, power 100 mA, config 1, C-Media USB Audio Device(0x0008), ABC(0x0d8c), rev 1.00 port 4 addr 5: high speed, power 300 mA, config 1, Mass Storage Device(0x1000), JetFlash(0x8564), rev 11.00, iSerialNumber 01TC5Y2I6Q9SV6N0 port 5 powered pcidump: acpidump: login: panic: kernel diagnostic assertion "xfertype != UE_ISOCHRONOUS || xfer->nframes < DWC2_MAXISOCP1 Stopped at panic+0x154: TID PID UID PRFLAGS PFLAGS C PU COMMAND *419441 22975 0 0x100003 0 0 cat db_enter() at panic+0x150 panic() at dwc2_device_start+0x448 dwc2_device_start() at usbd_transfer+0x144 usbd_transfer() at uaudio_trigger_output+0x120 uaudio_trigger_output() at audio_start_do+0x94 audio_start_do() at audio_write+0x1d4 audio_write() at audiowrite+0x5c https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *22975 419441 5689 0 7 0x100003 cat 5689 467652 35953 0 3 0x83 wait bash 35953 389800 76291 0 3 0x92 select sshd 55493 253406 1 0 3 0x100083 ttyin getty 97168 494148 1 0 3 0x100098 poll cron 10255 431749 1 110 3 0x100090 poll sndiod 79222 108616 1 99 3 0x100090 poll sndiod 61309 292664 59971 95 3 0x100092 kqread smtpd 55188 161108 59971 103 3 0x100092 kqread smtpd 3057 518445 59971 95 3 0x100092 kqread smtpd 96047 27174 59971 95 3 0x100092 kqread smtpd 62496 434645 59971 95 3 0x100092 kqread smtpd 86341 293036 59971 95 3 0x100092 kqread smtpd 59971 218445 1 0 3 0x100080 kqread smtpd 76291 269291 1 0 3 0x80 select sshd 43366 347618 1 0 3 0x100080 poll ntpd 53308 487670 18663 83 3 0x100092 poll ntpd 18663 139799 1 83 3 0x100092 poll ntpd 46385 231748 81846 74 3 0x100092 bpf pflogd 81846 179519 1 0 3 0x80 netio pflogd 5987 339260 90176 73 3 0x100090 kqread syslogd 90176 288179 1 0 3 0x100082 netio syslogd 26715 191971 1 77 3 0x100090 poll dhclient 46511 488471 1 0 3 0x80 poll dhclient 89838 99419 67154 115 3 0x100092 kqread slaacd 74675 410858 67154 115 3 0x100092 kqread slaacd 67154 112738 1 0 3 0x80 kqread slaacd 35000 80939 0 0 3 0x14200 pgzero zerothread 1930 360823 0 0 3 0x14200 aiodoned aiodoned 7795 131091 0 0 3 0x14200 syncer update 9439 93014 0 0 3 0x14200 cleaner cleaner 86999 116209 0 0 3 0x14200 reaper reaper 27002 169944 0 0 3 0x14200 pgdaemon pagedaemon 78386 146948 0 0 3 0x14200 bored crynlk 71716 214983 0 0 3 0x14200 bored crypto 63505 380144 0 0 3 0x14200 usbtsk usbtask 70205 106443 0 0 3 0x14200 usbatsk usbatsk 97567 374047 0 0 3 0x14200 bored dwc2 86482 325590 0 0 3 0x14200 bored softnet 48572 19531 0 0 3 0x14200 bored systqmp 98789 134774 0 0 3 0x14200 bored systq 36876 246705 0 0 3 0x40014200 bored softclock 81598 422523 0 0 3 0x40014200 idle0 83526 462821 0 0 3 0x14200 kmalloc kmthread 1 154280 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> trace db_enter() at panic+0x150 panic() at dwc2_device_start+0x448 dwc2_device_start() at usbd_transfer+0x144 usbd_transfer() at uaudio_trigger_output+0x120 uaudio_trigger_output() at audio_start_do+0x94 audio_start_do() at audio_write+0x1d4 audio_write() at audiowrite+0x5c audiowrite() at spec_write+0xa4 spec_write() at VOP_WRITE+0x4c VOP_WRITE() at vn_write+0xe4 vn_write() at dofilewritev+0x1c4 dofilewritev() at sys_write+0xa0 sys_write() at svc_handler+0x1bc svc_handler() at do_el0_sync+0xe0 do_el0_sync() at handle_el0_sync+0x68 handle_el0_sync() at 0x7f59761e8 --- trap --- ddb> boot dump syncing disks... 6 5 done WARNING: not updating battery clock dump to dev 4,1 not possible rebooting... U-Boot 2017.11 (Dec 02 2017 - 03:42:26 -0700) DRAM: 948 MiB RPI 3 Model B (0xa02082) MMC: sdhci@7e300000: 0 reading uboot.env In: serial Out: vidconsole Err: vidconsole Net: No ethernet found. starting USB... USB0: Core Release: 2.80a scanning bus 0 for devices... 5 USB Device(s) found scanning usb for storage devices... 1 Storage Device(s) found Hit any key to stop autoboot: 0 Device 0: Vendor: JetFlash Rev: 1100 Prod: Transcend 16GB Type: Removable Hard Disk Capacity: 15064.0 MB = 14.7 GB (30851072 x 512) ... is now current device Scanning usb 0:1... Found EFI removable media binary efi/boot/bootaa64.efi Scanning disk sd...@7e300000.blk... Scanning disk usb_mass_storage.lun0... Found 2 disks reading efi/boot/bootaa64.efi 82748 bytes read in 80 ms (1009.8 KiB/s) ## Starting EFI application at 01000000 ... >> OpenBSD/arm64 BOOTAA64 0.11 boot> booting sd0a:/bsd: 3927280+587192+577992+805976 [280187+96+460944+245212]=0x842eb0 type 0x0 pa 0x0 va 0x0 pages 0x1 attr 0x8 type 0x7 pa 0x1000 va 0x0 pages 0x1ff attr 0x8 type 0x2 pa 0x200000 va 0x200000 pages 0x4000 attr 0x8 type 0x7 pa 0x4200000 va 0x0 pages 0x3e00 attr 0x8 type 0x4 pa 0x8000000 va 0x8000000 pages 0x6 attr 0x8 type 0x7 pa 0x8007000 va 0x0 pages 0x31814 attr 0x8 type 0x2 pa 0x3981b000 va 0x3981b000 pages 0x4 attr 0x8 type 0x2 pa 0x3981f000 va 0x3981f000 pages 0x4 attr 0x8 type 0x2 pa 0x39823000 va 0x39823000 pages 0x4 attr 0x8 type 0x2 pa 0x39827000 va 0x39827000 pages 0x4 attr 0x8 <etc>