I have additional information, I wanna informed you. Probably I found what is generate this bug. Kernel panic does not happen and the sound is working with this setting on the device.
AudioStreaming Endpoint Descriptor: bLength 8 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x00 bmControls 0x00 bLockDelayUnits 0 Undefined wLockDelay 0x0000
But if, I change bmAttributes to MaxPacketsOnly this make kernel panic:
AudioStreaming Endpoint Descriptor: bLength 8 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x80 MaxPacketsOnly bmControls 0x00 bLockDelayUnits 0 Undefined wLockDelay 0x0000
On Mon, 1 Apr 2019 at 12:41, Victor L victor910@gmail.com wrote:
Hi ,
I have Linux panic when started play music with one of my USB audio device. first please see this logs:
[ 71.684730] usbcore: registered new interface driver snd-usb-audio [ 73.835355] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 73.835412] IP: [<ffffffffc0b45d3c>] snd_usb_endpoint_start+0x23c/0x2f0 [snd_usb_audio] [ 73.835414] PGD 0 [ 73.835415] [ 73.835418] Oops: 0000 [#1] PREEMPT SMP [ 73.835482] Modules linked in: snd_usb_audio snd_usbmidi_lib snd_hwdep snd_pcm_oss snd_mixer_oss snd_ pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore coretemp iwl3945 iwlegacy i915 ehci_pci iTCO_wdt ehci_hcd pcmcia iTCO_vendor_support kvm usbcore mac80211 e1000e yenta_socket sr_mod pcmcia_rsrc cfg80211 pcmcia_core lpc_ich mfd_core drm_kms_helper cdrom rfkill ata_ge neric irqbypass ptp pps_core joydev sg pcspkr i2c_i801 drm battery i2c_algo_bit ata_piix i2c_smbus usb_c ommon shpchp rng_core ac acpi_cpufreq video button nls_utf8 cifs sha256_ssse3 cmac md4 des_generic arc4 dns_resolver fscache sunrpc loop ip_tables x_tables autofs4 ext4 crc16 jbd2 crc32c_generic fscrypto ecb glue_helper lrw gf128mul ablk_helper cryptd aes_x86_64 mbcache sd_mod ahci libahci [ 73.835486] evdev libata psmouse serio_raw scsi_mod thermal [ 73.835491] CPU: 1 PID: 1099 Comm: output:oops Not tainted 4.9.144-rt93 #1 [ 73.835492] Hardware name: LENOVO 636962M/636962M, BIOS 7IET38WW (1.19 ) 03/22/2011 [ 73.835494] task: ffff8beb97502c40 task.stack: ffffac1901068000 [ 73.835505] RIP: 0010:[<ffffffffc0b45d3c>] [<ffffffffc0b45d3c>] snd_usb_endpoint_start+0x23c/0x2f0 [ snd_usb_audio] [ 73.835507] RSP: 0000:ffffac190106bcc0 EFLAGS: 00010246 [ 73.835508] RAX: 00000000ffffffea RBX: ffff8beb96c00000 RCX: 00000000ffffffea [ 73.835509] RDX: 0000000000000000 RSI: ffffffffc0b5bf98 RDI: ffff8beb99a18000 [ 73.835511] RBP: 0000000000000002 R08: ffffffffc0b5a8d3 R09: 0000000000000000 [ 73.835512] R10: 00000000fffffe00 R11: 0000000000000200 R12: ffff8beb96c80070 [ 73.835513] R13: ffff8beb99a18000 R14: 0000000000000002 R15: 0000000000000000 [ 73.835516] FS: 00007fdfedc66700(0000) GS:ffff8bebbf300000(0000) knlGS:0000000000000000 [ 73.835518] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.835519] CR2: 0000000000000008 CR3: 00000000b4ab6000 CR4: 0000000000000670 [ 73.835520] Stack: [ 73.835525] ffff8bebb8888c18 ffff8beb96c00000 0000000000000000 0000000000008002 [ 73.835528] 00007fdfe40197d0 ffffffffc0b4e7cd ffff8bebb8888c18 ffff8beb974b2400 [ 73.835531] ffffffffc0b5088a ffff8beb0000ac44 ffff8bebb206d300 0000000000000000 [ 73.835531] Call Trace: [ 73.835545] [<ffffffffc0b4e7cd>] ? start_endpoints+0x3d/0x150 [snd_usb_audio] [ 73.835555] [<ffffffffc0b5088a>] ? snd_usb_pcm_prepare+0x2ea/0x520 [snd_usb_audio] [ 73.835577] [<ffffffffc0b0c176>] ? snd_pcm_sw_params_user+0x56/0x90 [snd_pcm] [ 73.835584] [<ffffffffc0b0b2d9>] ? snd_pcm_do_prepare+0x19/0x30 [snd_pcm] [ 73.835591] [<ffffffffc0b09ea6>] ? snd_pcm_action_single+0x36/0x80 [snd_pcm] [ 73.835598] [<ffffffffc0b0a311>] ? snd_pcm_action_nonatomic+0x61/0x70 [snd_pcm] [ 73.835606] [<ffffffffc0b0e219>] ? snd_pcm_common_ioctl1+0x3a9/0xc60 [snd_pcm] [ 73.835674] [<ffffffffc03a73ce>] ? ext4_file_write_iter+0x22e/0x370 [ext4] [ 73.835682] [<ffffffffc0b0ecaa>] ? snd_pcm_playback_ioctl1+0x1da/0x240 [snd_pcm] [ 73.835690] [<ffffffffb9736a38>] ? __seccomp_filter+0x78/0x2a0 [ 73.835698] [<ffffffffc0b0ed33>] ? snd_pcm_playback_ioctl+0x23/0x30 [snd_pcm] [ 73.835702] [<ffffffffb982c9c4>] ? do_vfs_ioctl+0xa4/0x620 [ 73.835706] [<ffffffffb96033b4>] ? syscall_trace_enter+0x144/0x300 [ 73.835709] [<ffffffffb982cfb4>] ? SyS_ioctl+0x74/0x80 [ 73.835711] [<ffffffffb9603c56>] ? do_syscall_64+0x76/0x100 [ 73.835717] [<ffffffffb9c38b4e>] ? entry_SYSCALL_64_after_swapgs+0x58/0xc6 [ 73.835747] Code: c0 d3 a8 b5 c0 83 f8 a6 74 15 83 f8 e0 49 c7 c0 8c a8 b5 c0 48 c7 c2 74 a8 b5 c0 4c 0f 45 c2 48 8b 13 89 c1 48 c7 c6 98 bf b5 c0 <48> 8b 7a 08 89 ea 48 81 c7 98 00 00 00 e8 e2 7b f4 f8 f0 80 63 [ 73.835757] RIP [<ffffffffc0b45d3c>] snd_usb_endpoint_start+0x23c/0x2f0 [snd_usb_audio] [ 73.835758] RSP <ffffac190106bcc0> [ 73.835759] CR2: 0000000000000008
I give you more detail, I have Debian Linux 4.9.144-rt93. I tested under Debian 4.19 and Ubuntu same panic present. Please help me to fix this problem, this device working fine under Windows. I believe this problem in Linux audio driver. I ready to provide any additional details if needs. -- Regards, Viktor L