WARNING: CPU: 1 PID: 7062 at mm/kmsan/kmsan.c:1363 kmsan_get_shadow_address+0xa3/0x1f0 mm/kmsan/kmsan.c:1363
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7062 Comm: syz-executor2 Not tainted 4.17.0+ #9
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+0x185/0x1d0 lib/dump_stack.c:113
 panic+0x3d0/0x990 kernel/panic.c:184
 __warn+0x40f/0x580 kernel/panic.c:536
 report_bug+0x72a/0x880 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x1c1/0x620 arch/x86/kernel/traps.c:298
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:317
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:995
RIP: 0010:kmsan_get_shadow_address+0xa3/0x1f0 mm/kmsan/kmsan.c:1363
RSP: 0018:ffff8801146cfa98 EFLAGS: 00010086
RAX: 00000000000003df RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffc9000219d000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffff8801146cfab0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff86575950 R12: 0000000000000246
R13: 000000000000fffc R14: 0000000000000001 R15: 000000000000fffc
 kmsan_internal_check_memory+0x81/0x1f0 mm/kmsan/kmsan.c:1210
 kmsan_copy_to_user+0x7a/0x160 mm/kmsan/kmsan.c:1261
 copy_to_user include/linux/uaccess.h:184 [inline]
 snd_pcm_oss_read2 sound/core/oss/pcm_oss.c:1478 [inline]
 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1531 [inline]
 snd_pcm_oss_read+0xe94/0x1b30 sound/core/oss/pcm_oss.c:2752
 __vfs_read+0x1b2/0x9d0 fs/read_write.c:416
 vfs_read+0x36c/0x6b0 fs/read_write.c:452
 ksys_read fs/read_write.c:578 [inline]
 __do_sys_read fs/read_write.c:588 [inline]
 __se_sys_read fs/read_write.c:586 [inline]
 __x64_sys_read+0x1bf/0x3e0 fs/read_write.c:586
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455b29
RSP: 002b:00007fa27f068c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fa27f0696d4 RCX: 0000000000455b29
RDX: 000000002693ea04 RSI: 0000000020000080 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c07aa R14: 00000000004d0178 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..