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WARNING: CPU: 1 PID: 20704 at sound/core/info.c:637 snd_info_get_line+0x1fd/0x2c0 sound/core/info.c:637
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 20704 Comm: syz-executor.0 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:snd_info_get_line+0x1fd/0x2c0 sound/core/info.c:637
RSP: 0018:ffff888048177ac8 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff8880a0c08800 RCX: ffffc90005b18000
RDX: 0000000000000082 RSI: ffffffff84eb14bd RDI: ffff8880a0c08800
RBP: dffffc0000000000 R08: ffffffff8a06ba70 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88809f1be040 R12: dffffc0000000000
R13: 0000000000000080 R14: ffff8880a0edbec8 R15: ffff88809b074c40
 snd_mixer_oss_proc_write+0xc9/0x480 sound/core/oss/mixer_oss.c:1192
 snd_info_text_entry_release+0xfa/0x260 sound/core/info.c:425
 close_pdeo.part.0+0xdd/0x2c0 fs/proc/inode.c:165
 close_pdeo fs/proc/inode.c:382 [inline]
 proc_reg_release+0x1fd/0x250 fs/proc/inode.c:376
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c369
RSP: 002b:00007f9d4ec0ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000021
RAX: 0000000000000003 RBX: 0000000000002980 RCX: 000000000045c369
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 000000000078bf38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffc1a244daf R14: 00007f9d4ec0f9c0 R15: 000000000078bf0c
Kernel Offset: disabled
Rebooting in 86400 seconds..