------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan_instr.c:267!
invalid opcode: 0000 [#1] SMP
CPU: 0 PID: 8518 Comm: kworker/1:4 Not tainted 4.20.0-rc7+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__msan_poison_alloca+0x263/0x270 mm/kmsan/kmsan_instr.c:265
Code: 8b 04 25 28 00 00 00 48 3b 44 24 60 75 15 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 0f 0b 0f 0b e8 6f 03 59 ff 0f 0b <0f> 0b 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41
RSP: 0018:ffff88813ab8fcf0 EFLAGS: 00010096
RAX: 00000000f5600006 RBX: ffff8881661f5a00 RCX: 0000000000000004
RDX: 0000000000000004 RSI: 0000000000480020 RDI: ffffffff8aae7a64
RBP: ffff88813ab8fd88 R08: 0000000000000002 R09: ffff88813ab8fd48
R10: 0000000000000000 R11: ffffffff816a2990 R12: ffff88813ab8fdcf
R13: 0000000000000046 R14: 0000000000000001 R15: ffffffff8ba99180
FS:  0000000000000000(0000) GS:ffff88821fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba5bbc6000 CR3: 000000013c630000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 trace_sched_switch+0x7f/0x290 include/trace/events/sched.h:138
 __schedule+0x2b4/0x830 kernel/sched/core.c:3475
 schedule+0x1ab/0x2b0 kernel/sched/core.c:3522
 kthread+0x3cb/0x4e0 kernel/kthread.c:241
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
Modules linked in:
---[ end trace 8a8130d0ad7bac0b ]---
RIP: 0010:__msan_poison_alloca+0x263/0x270 mm/kmsan/kmsan_instr.c:265
Code: 8b 04 25 28 00 00 00 48 3b 44 24 60 75 15 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 0f 0b 0f 0b e8 6f 03 59 ff 0f 0b <0f> 0b 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41
RSP: 0018:ffff88813ab8fcf0 EFLAGS: 00010096
RAX: 00000000f5600006 RBX: ffff8881661f5a00 RCX: 0000000000000004
RDX: 0000000000000004 RSI: 0000000000480020 RDI: ffffffff8aae7a64
RBP: ffff88813ab8fd88 R08: 0000000000000002 R09: ffff88813ab8fd48
R10: 0000000000000000 R11: ffffffff816a2990 R12: ffff88813ab8fdcf
R13: 0000000000000046 R14: 0000000000000001 R15: ffffffff8ba99180
FS:  0000000000000000(0000) GS:ffff88821fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba5bbc6000 CR3: 000000013c630000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400