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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: 0 PID: 10948 Comm: syz-executor5 Not tainted 4.18.0-rc8+ #34
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+0x17c/0x1c0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:982
 __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:1006
RIP: 0010:fpu__drop+0x27f/0x510 arch/x86/kernel/fpu/core.c:345
Code: 02 00 00 48 8b 7d c0 8a 1f e8 6d b8 b1 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 9f bf 89 48 
RSP: 0000:ffff8801994cfc80 EFLAGS: 00010202
RAX: ffff880122499a00 RBX: ffff880121b91a01 RCX: ffff88011d791a04
RDX: ffff88011d791a04 RSI: aaaaaaaaaaaab000 RDI: ffffea0006ca5660
RBP: ffff8801994cfcd0 R08: 0000000000480020 R09: 0000000000000002
R10: ffff8801994cfe10 R11: 0000000000000000 R12: 0000000000000000
R13: ffff880121b908f8 R14: ffff880121b91a00 R15: 0000000000000000
 fpu__clear+0x52/0x300 arch/x86/kernel/fpu/core.c:388
 handle_signal arch/x86/kernel/signal.c:767 [inline]
 do_signal+0x1abb/0x2090 arch/x86/kernel/signal.c:818
 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline]
 prepare_exit_to_usermode+0x273/0x410 arch/x86/entry/common.c:197
 retint_user+0x8/0x8
RIP: 0033:0x4062e0
Code: 48 33 0c 25 28 00 00 00 0f b6 44 24 05 75 10 48 83 c4 10 5b c3 bf 06 1d 4c 00 e8 0b c3 ff ff e8 26 49 05 00 66 0f 1f 44 00 00 <53> 48 8b 76 10 89 fb 64 8b 04 25 d0 ff ff ff 85 c0 74 3d 48 8d 86 
RSP: 002b:00000000200001f8 EFLAGS: 00000217
RAX: 0000000000000000 RBX: 00007f6e480d96d4 RCX: 0000000000457089
RDX: 0000000020000200 RSI: 0000000020000330 RDI: 000000000000000b
RBP: 00000000009300a0 R08: 0000000020000700 R09: 0000000000000000
R10: 0000000020000480 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cb4e8 R14: 00000000004c30d7 R15: 0000000000000000

Local variable description: ----env.i@copy_fpstate_to_sigframe
Variable was created at:
 copy_fpstate_to_sigframe+0x69/0xbb0 arch/x86/kernel/fpu/signal.c:158
 0xe8c00061
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