------------[ cut here ]------------
URB 00000000a5ff3106 submitted while active
WARNING: CPU: 1 PID: 8248 at drivers/usb/core/urb.c:363 usb_submit_urb+0x112f/0x1320 drivers/usb/core/urb.c:363
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8248 Comm: syz-executor.5 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:542
RIP: 0010:usb_submit_urb+0x112f/0x1320 drivers/usb/core/urb.c:363
Code: 89 de e8 24 01 5f fc 84 db 0f 85 3d fa ff ff e8 d7 04 5f fc 4c 89 fe 48 c7 c7 c0 04 cd 88 c6 05 3b 37 95 05 01 e8 23 45 30 fc <0f> 0b e9 1b fa ff ff c7 44 24 14 01 00 00 00 e9 3e f5 ff ff 41 bd
RSP: 0018:ffffc900051372a0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88808483c340 RSI: ffffffff815d4f87 RDI: fffff52000a26e46
RBP: ffff88809fd3e800 R08: 0000000000000001 R09: ffff8880ae7318e7
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 00000000fffffff0 R14: ffff888096e9ef00 R15: ffff888096e9ef00
 snd_usbmidi_submit_urb sound/usb/midi.c:194 [inline]
 snd_usbmidi_input_start_ep sound/usb/midi.c:2313 [inline]
 snd_usbmidi_input_start.part.0+0x101/0x200 sound/usb/midi.c:2329
 snd_usbmidi_input_start sound/usb/midi.c:1119 [inline]
 substream_open.isra.0+0x82c/0xc10 sound/usb/midi.c:1119
 open_substream+0x42e/0x880 sound/core/rawmidi.c:299
 rawmidi_open_priv+0x519/0x6f0 sound/core/rawmidi.c:342
 snd_rawmidi_kernel_open+0x1b5/0x270 sound/core/rawmidi.c:382
 midisynth_subscribe+0xf2/0x350 sound/core/seq/seq_midi.c:170
 subscribe_port sound/core/seq/seq_ports.c:412 [inline]
 check_and_subscribe_port+0x89a/0xb80 sound/core/seq/seq_ports.c:495
 snd_seq_port_connect+0x2e6/0x520 sound/core/seq/seq_ports.c:564
 snd_seq_ioctl_subscribe_port+0x1fc/0x400 sound/core/seq/seq_clientmgr.c:1484