------------[ cut here ]------------
BUG?
WARNING: CPU: 0 PID: 3419 at sound/usb/midi.c:1137 snd_usbmidi_output_open+0xd8/0x410 sound/usb/midi.c:1137
Modules linked in:
CPU: 0 PID: 3419 Comm: syz-executor.0 Not tainted 6.1.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:snd_usbmidi_output_open+0xd8/0x410 sound/usb/midi.c:1137
Code: 3c 02 00 0f 85 03 03 00 00 4d 8b be 10 02 00 00 4d 85 ff 0f 85 c8 00 00 00 e8 24 0f 36 fa 48 c7 c7 a0 f5 f1 8a e8 9f 22 03 02 <0f> 0b 41 bc fa ff ff ff e8 0b 0f 36 fa 44 89 e0 48 83 c4 08 5b 5d
RSP: 0018:ffffc90016bc7398 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888072ee9000 RCX: 0000000000000000
RDX: ffff888077eb57c0 RSI: ffffffff81622b98 RDI: fffff52002d78e65
RBP: ffff8880633b0f00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff88807c7de600
R13: 0000000000000000 R14: ffff888075ac9800 R15: 0000000000000000
FS:  00007f9f62b73700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000069fc1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 open_substream+0x41d/0x8c0 sound/core/rawmidi.c:344
 rawmidi_open_priv+0x591/0x6f0 sound/core/rawmidi.c:394
 snd_rawmidi_kernel_open+0x1b5/0x270 sound/core/rawmidi.c:429
 midisynth_use+0xee/0x270 sound/core/seq/seq_midi.c:215
 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+0x382/0x540 sound/core/seq/seq_ports.c:581
 snd_seq_ioctl_subscribe_port+0x1fc/0x400 sound/core/seq/seq_clientmgr.c:1490
 snd_seq_kernel_client_ctl+0x102/0x1c0 sound/core/seq/seq_clientmgr.c:2367
 snd_seq_oss_midi_open+0x582/0x6e0 sound/core/seq/oss/seq_oss_midi.c:361
 snd_seq_oss_synth_setup_midi+0x12d/0x530 sound/core/seq/oss/seq_oss_synth.c:269
 snd_seq_oss_open+0x8b8/0xa70 sound/core/seq/oss/seq_oss_init.c:260
 odev_open+0x6c/0x90 sound/core/seq/oss/seq_oss.c:128
 soundcore_open+0x44e/0x620 sound/sound_core.c:593
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x6cc/0x13f0 fs/open.c:882
 do_open fs/namei.c:3557 [inline]
 path_openat+0x1bf6/0x2860 fs/namei.c:3713
 do_filp_open+0x1b6/0x400 fs/namei.c:3740
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9f61e8b639
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9f62b73168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9f61fac050 RCX: 00007f9f61e8b639
RDX: 0000000000020983 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007f9f61ee6ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f620cfb1f R14: 00007f9f62b73300 R15: 0000000000022000
 </TASK>