Not allocated shadow for addr ffff8801c3000000 (page ffffea000a920000)
Not allocated shadow for addr ffff8801c3000000 (page ffffea000a920000)
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kernel BUG at mm/kmsan/kmsan.c:1326!
kernel BUG at mm/kmsan/kmsan.c:1326!
invalid opcode: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4525 Comm: syz-executor123 Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 mm/kmsan/kmsan.c:1325
RSP: 0018:ffff8801c5bdf978 EFLAGS: 00010002
RAX: 0000000000000046 RBX: 0000000000000700 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88021fc30418
RBP: ffff8801c5bdf990 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c3000000
R13: 000000000000b000 R14: 0000000000000001 R15: 0000000000001000
FS:  00007f778bae1700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 00000001a67e8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kmsan_internal_memset_shadow mm/kmsan/kmsan.c:171 [inline]
 kmsan_internal_unpoison_shadow+0x5c/0xe0 mm/kmsan/kmsan.c:208
 kmsan_unpoison_shadow+0x66/0xb0 mm/kmsan/kmsan.c:222
 get_user_pages_fast+0x47b/0x760 mm/gup.c:1823
 iov_iter_get_pages+0x465/0x1810 lib/iov_iter.c:1074
 iter_to_pipe fs/splice.c:1206 [inline]
 vmsplice_to_pipe fs/splice.c:1310 [inline]
 SYSC_vmsplice+0xa66/0x1960 fs/splice.c:1351
 SyS_vmsplice+0x64/0x90 fs/splice.c:1334
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x4454f9
RSP: 002b:00007f778bae0db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000116
RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004454f9
RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc68aa536f R14: 00007f778bae19c0 R15: 0000000000000002
Code: 75 29 48 c7 c7 fd 92 7d 8a 31 c0 e8 4d 68 86 ff 80 3c 25 e8 03 2c 8b 00 75 11 48 c7 c7 2d 93 7d 8a 31 c0 4c 89 fe e8 32 68 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 
RIP: kmsan_get_shadow_address+0x1ce/0x1f0 mm/kmsan/kmsan.c:1325 RSP: ffff8801c5bdf978
---[ end trace 50af01b4d1c66f34 ]---
invalid opcode: 0000 [#2] SMP PTI
Dumping ftrace buffer: