------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan_hooks.c:268!
invalid opcode: 0000 [#1] SMP PTI
CPU: 1 PID: 4304 Comm: syz-fuzzer Not tainted 4.19.0-rc3+ #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_free_page+0x281/0x2d0 mm/kmsan/kmsan_hooks.c:329
Code: 7d d0 83 c0 ff 41 89 85 f4 08 00 00 75 59 e8 26 81 49 ff 4c 89 7d c0 ff 75 c0 9d 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66
RSP: 0018:ffff8801ae70f300 EFLAGS: 00010286
RAX: 000000000000003a RBX: ffffea000162d610 RCX: 0000000000000009
RDX: ffff8801ff814498 RSI: 0000000000000009 RDI: ffffea000162c000
RBP: ffff8801ae70f348 R08: 0000000000480020 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff81c47080 R12: 0000000000000200
R13: 0000000000000009 R14: 0000000000000009 R15: ffff8801c4276180
FS:  000000c4200883e8(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564ce75ffa60 CR3: 00000001c0b52000 CR4: 00000000001406e0
Call Trace:
 free_pages_prepare mm/page_alloc.c:993 [inline]
 __free_pages_ok+0x25a/0x16c0 mm/page_alloc.c:1251
 free_compound_page+0x8b/0xc0 mm/page_alloc.c:571
 free_transhuge_page+0x3af/0x460 mm/huge_memory.c:2733
 __put_compound_page mm/swap.c:96 [inline]
 release_pages+0x70c/0x1650 mm/swap.c:760
 free_pages_and_swap_cache+0x54b/0x570 mm/swap_state.c:319
 tlb_flush_mmu_free mm/memory.c:250 [inline]
 zap_pte_range mm/memory.c:1406 [inline]
 zap_pmd_range mm/memory.c:1441 [inline]
 zap_pud_range mm/memory.c:1470 [inline]
 zap_p4d_range mm/memory.c:1491 [inline]
 unmap_page_range+0x37b8/0x4170 mm/memory.c:1512
 unmap_single_vma+0x445/0x5e0 mm/memory.c:1557
 unmap_vmas+0x251/0x380 mm/memory.c:1587
 exit_mmap+0x4b7/0x940 mm/mmap.c:3093
 __mmput+0x154/0x5f0 kernel/fork.c:1002
 mmput+0xa7/0xe0 kernel/fork.c:1023
 exit_mm+0x6dd/0x790 kernel/exit.c:546
 do_exit+0xbf7/0x3890 kernel/exit.c:856
 do_group_exit+0x1a0/0x350 kernel/exit.c:972
 __do_sys_exit_group+0x21/0x30 kernel/exit.c:983
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:981
 __x64_sys_exit_group+0x1d/0x20 kernel/exit.c:981
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x47fc44
Code: Bad RIP value.
RSP: 002b:000000c448081680 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fc44
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000c4480816c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000c43b422240
R13: 00000000008aa0ce R14: 0000000000000011 R15: 0000000000000018
Modules linked in:
---[ end trace 5c54869d8f8fd1fc ]---
RIP: 0010:kmsan_free_page+0x281/0x2d0 mm/kmsan/kmsan_hooks.c:329
Code: 7d d0 83 c0 ff 41 89 85 f4 08 00 00 75 59 e8 26 81 49 ff 4c 89 7d c0 ff 75 c0 9d 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66
RSP: 0018:ffff8801ae70f300 EFLAGS: 00010286
RAX: 000000000000003a RBX: ffffea000162d610 RCX: 0000000000000009
RDX: ffff8801ff814498 RSI: 0000000000000009 RDI: ffffea000162c000
RBP: ffff8801ae70f348 R08: 0000000000480020 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff81c47080 R12: 0000000000000200
R13: 0000000000000009 R14: 0000000000000009 R15: ffff8801c4276180
FS:  000000c4200883e8(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000047fc1a CR3: 00000001c0b52000 CR4: 00000000001406e0