------------[ cut here ]------------
kmsan_get_shadow_address_inline(fffffe0000016f08, 8, 1)
WARNING: CPU: 0 PID: 6623 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: 6623 Comm: syz-executor2 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: ffffc90001f9c000 RSI: 0000000000001100 RDI: 0000000000001101
RBP: fffffe0000016df0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff86577160 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000008 R15: ffff88012b1c0000
 __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+0xa0/0xc0 arch/x86/lib/copy_user_64.S:75
RSP: 0018:ffff88012b1ef550 EFLAGS: 00000202
RAX: ffffffff83ffc523 RBX: 0000000020000000 RCX: 0000000000000004
RDX: 0000000000000004 RSI: 0000000020000000 RDI: ffff88012b1ef68c
RBP: ffff88012b1ef5d0 R08: 0000000000000000 R09: 0000000000000028
R10: 0000000000000000 R11: ffffffff8189dc30 R12: ffff88012b1ef558
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000004
 </#DB>
 copy_from_user include/linux/uaccess.h:171 [inline]
 dev_ethtool+0x899/0xeb20 net/core/ethtool.c:2616
 dev_ioctl+0x851/0x1fd0 net/core/dev_ioctl.c:435
 sock_do_ioctl+0x43f/0x6c0 net/socket.c:980
 sock_ioctl+0x748/0xd10 net/socket.c:1081
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xcbd/0x24b0 fs/ioctl.c:686
 ksys_ioctl fs/ioctl.c:701 [inline]
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x280/0x320 fs/ioctl.c:706
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x455ab9
RSP: 002b:00007fd326402c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd3264036d4 RCX: 0000000000455ab9
RDX: 0000000020000100 RSI: 0000000000008946 RDI: 0000000000000015
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bf927 R14: 00000000004ceb20 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..