==================================================================
BUG: KMSAN: uninit-value in cond_local_irq_enable arch/x86/kernel/traps.c:80 [inline]
BUG: KMSAN: uninit-value in math_error+0x330/0x620 arch/x86/kernel/traps.c:841
CPU: 1 PID: 16717 Comm: syz-executor3 Not tainted 4.19.0-rc1+ #40
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+0x14b/0x190 lib/dump_stack.c:113
 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956
 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
 cond_local_irq_enable arch/x86/kernel/traps.c:80 [inline]
 math_error+0x330/0x620 arch/x86/kernel/traps.c:841
 do_coprocessor_error+0x29/0x30 arch/x86/kernel/traps.c:880
 coprocessor_error+0x14/0x20 arch/x86/entry/entry_64.S:1007
RIP: 0010:fpu__drop+0x27f/0x510 arch/x86/kernel/fpu/core.c:346
Code: 02 00 00 48 8b 7d c0 8a 1f e8 1d 13 b4 00 8a 00 84 c0 74 0a f6 d0 20 d8 0f 84 15 02 00 00 84 db 0f 84 1c 02 00 00 4c 89 75 b8 <9b> 65 48 c7 04 25 58 fc 02 00 00 00 00 00 8b 1c 25 b8 27 01 8a 48
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
RSP: 0018:ffff8801098bfca0 EFLAGS: 00010202
RAX: ffff8801282a5500 RBX: ffff88012794d501 RCX: ffff8801282ad504
RDX: ffff8801282ad504 RSI: aaaaaaaaaaaab000 RDI: ffffea0006ed7ce0
RBP: ffff8801098bfcf0 R08: 0000000000480020 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff81094fe0 R12: 0000000000000000
R13: ffff88012794c400 R14: ffff88012794d500 R15: 0000000000000000
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
 fpu__clear+0x52/0x300 arch/x86/kernel/fpu/core.c:389
 __fpu__restore_sig arch/x86/kernel/fpu/signal.c:280 [inline]
 fpu__restore_sig+0x333/0x1470 arch/x86/kernel/fpu/signal.c:388
 restore_sigcontext arch/x86/kernel/signal.c:153 [inline]
 __ia32_sys_rt_sigreturn+0x1102/0x1810 arch/x86/kernel/signal.c:654
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: e703:          (null)
Code: Bad RIP value.
RSP: 0003:000000000040dd65 EFLAGS: 00000702
RAX: 0000000000000000 RBX: 00000000004083dc RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00007f80ca90e9c0 RDI: 0000000000a3fb9f
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 5204cca70d802f00 R12: 0000000000000000
R13: 00000000009300a8 R14: 00000000009300a0 R15: 00000000009300ac

Local variable description: ----ldt.i.i.i@switch_mm_irqs_off
Variable was created at:
 switch_mm_irqs_off+0xd1/0x18c0 arch/x86/mm/tlb.c:183
 context_switch kernel/sched/core.c:2817 [inline]
 __schedule+0x5c6/0x760 kernel/sched/core.c:3479
==================================================================