WARNING: CPU: 0 PID: 29211 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: 0 PID: 29211 Comm: syz-executor1 Not tainted 5.0.0-rc4-next-20190201 #25 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+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 __warn.cold+0x20/0x45 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: 1c fc 45 85 ed 75 15 e8 93 a7 1c fc 4c 89 e7 e8 2b 0f 54 fc 31 c0 41 5c 41 5d 5d c3 e8 7e a7 1c fc 0f 0b eb e2 e8 75 a7 1c fc <0f> 0b eb 98 e8 7c 49 54 fc eb bb e8 75 49 54 fc e9 73 ff ff ff e8 RSP: 0018:ffff88808f8efb38 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff88821654c990 RCX: ffffc9000841a000 RDX: 000000000000b01d RSI: ffffffff8553541b RDI: 0000000000000005 RBP: ffff88808f8efb48 R08: ffff888091e2c5c0 R09: ffff888091e2ce60 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888089c00040 R13: 0000000000000001 R14: ffff888089c00098 R15: 0000000000000001 snd_seq_delete_port+0x272/0x340 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+0xba/0x100 sound/core/seq/seq_ports.c:705 delete_port+0x87/0xd0 sound/core/seq/oss/seq_oss_init.c:354 snd_seq_oss_release+0xf5/0x150 sound/core/seq/oss/seq_oss_init.c:433 odev_release+0x54/0x80 sound/core/seq/oss/seq_oss.c:153 __fput+0x2df/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x273/0x2c0 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+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f160db4dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f160db4e6d4 R13: 00000000004f4ad2 R14: 00000000004ce7d8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..