WARNING: CPU: 1 PID: 11072 at sound/core/seq/seq_ports.c:275 port_delete+0x18b/0x1c0 sound/core/seq/seq_ports.c:275
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 11072 Comm: syz-executor4 Not tainted 5.0.0-rc2+ #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop0' (00000000fdd60551): kobject_uevent_env
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
kobject: 'loop0' (00000000fdd60551): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (000000001b46f734): kobject_uevent_env
kobject: 'loop2' (000000001b46f734): fill_kobj_path: path = '/devices/virtual/block/loop2'
 __warn.cold+0x20/0x48 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:port_delete+0x18b/0x1c0 sound/core/seq/seq_ports.c:275
Code: 87 fb 45 85 ed 75 15 e8 33 90 87 fb 4c 89 e7 e8 1b 46 cb fb 31 c0 41 5c 41 5d 5d c3 e8 1e 90 87 fb 0f 0b eb e2 e8 15 90 87 fb <0f> 0b eb 98 e8 9c 80 cb fb eb bb e8 95 80 cb fb e9 73 ff ff ff e8
RSP: 0018:ffff88804c02f898 EFLAGS: 00010216
RAX: 0000000000040000 RBX: 1ffff11009805f22 RCX: ffffc9000e8b4000
RDX: 0000000000009028 RSI: ffffffff85fa6edb RDI: 0000000000000005
RBP: ffff88804c02f8a8 R08: ffff88808f94a080 R09: ffff88808f94a920
PM: Basic memory bitmaps created
R10: ffff88808f94a080 R11: 0000000000000000 R12: ffff88809a00d680
R13: 0000000000000001 R14: ffff88809a00d6d8 R15: 0000000000000001
 snd_seq_delete_port+0x31e/0x490 sound/core/seq/seq_ports.c:303
 snd_seq_ioctl_delete_port+0xba/0x190 sound/core/seq/seq_clientmgr.c:1324
 snd_seq_kernel_client_ctl+0x101/0x150 sound/core/seq/seq_clientmgr.c:2353
 snd_seq_event_port_detach+0x10a/0x170 sound/core/seq/seq_ports.c:705
 delete_port+0x87/0xd0 sound/core/seq/oss/seq_oss_init.c:354
 snd_seq_oss_release+0xf5/0x130 sound/core/seq/oss/seq_oss_init.c:433
 odev_release+0x54/0x80 sound/core/seq/oss/seq_oss.c:153
 __fput+0x3c5/0xb10 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdedf517c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdedf5186d4
R13: 00000000004f4b92 R14: 00000000004ce978 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..