------------[ cut here ]------------
kmsan_get_shadow_address_inline(fffffe0000016f08, 8, 1)
WARNING: CPU: 0 PID: 12925 at mm/kmsan/kmsan_instr.c:153 kmsan_get_shadow_address_inline+0x192/0x2e0 mm/kmsan/kmsan_instr.c:153
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 12925 Comm: syz-executor3 Not tainted 4.17.0+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <#DB>
 __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:997
RIP: 0010:kmsan_get_shadow_address_inline+0x192/0x2e0 mm/kmsan/kmsan_instr.c:153
RSP: 0018:fffffe0000016da8 EFLAGS: 00010082
RAX: 0000000000000037 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffffc900027a0000 RSI: 00000000000010ae RDI: 00000000000010af
RBP: fffffe0000016df0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff86577160 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000008 R15: ffff88012c219d40
 __msan_poison_alloca+0xa7/0x1d0 mm/kmsan/kmsan_instr.c:582
 do_debug+0x5b/0x800 arch/x86/kernel/traps.c:723
 debug+0x28/0x50 arch/x86/entry/entry_64.S:1156
RIP: 0010:copy_user_generic_unrolled+0x8c/0xc0 arch/x86/lib/copy_user_64.S:67
RSP: 0018:ffff88011f91fd00 EFLAGS: 00000202
RAX: ffffffff83ffc77b RBX: 0000000020000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffff88011f91fdf0 RDI: 0000000020000000
RBP: ffff88011f91fd68 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff83a3eea0 R12: 0000000000000000
R13: ffff88011f91fd08 R14: 0000000000000000 R15: ffff88012c21a618
 </#DB>
 copy_to_user include/linux/uaccess.h:183 [inline]
 ksys_msgctl+0x217/0x630 ipc/msg.c:575
 __do_sys_msgctl ipc/msg.c:601 [inline]
 __se_sys_msgctl ipc/msg.c:599 [inline]
 __x64_sys_msgctl+0xdb/0x120 ipc/msg.c:599
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x455ab9
RSP: 002b:00007f03511b4c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000047
RAX: ffffffffffffffda RBX: 00007f03511b56d4 RCX: 0000000000455ab9
RDX: 0000000020000000 RSI: 000000000000000c RDI: 0000000000000000
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c028e R14: 00000000004cfa68 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..