Not allocated shadow for addr ffff880100000000 (page ffffea0006000000)
Attempted to access 328 bytes
------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan.c:1114!
invalid opcode: 0000 [#1] SMP PTI
CPU: 0 PID: 18803 Comm: syz-executor5 Not tainted 4.19.0-rc1+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_get_shadow_address+0x2d6/0x3d0 mm/kmsan/kmsan.c:1112
Code: e9 89 00 00 00 c7 04 25 60 35 4f 8a 01 00 00 00 65 48 8b 04 25 80 fc 02 00 c6 80 f3 08 00 00 01 80 3c 25 78 35 4f 8a 00 74 0c <0f> 0b 0f 1f 84 00 00 00 00 00 eb fe 48 c7 c7 39 81 8a 89 31 c0 4c
RSP: 0018:ffff8801b730fb20 EFLAGS: 00010082
RAX: 000000000000001d RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: ffff8801b730fb50 R08: 0000000000000000 R09: ffff88021fc39250
R10: 0000000000000000 R11: ffffffff854248c0 R12: 0000000000000001
R13: ffff880100000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000001ff1940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d8b518db8 CR3: 0000000104728000 CR4: 00000000001406f0
DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 kmsan_internal_memset_shadow+0x5c/0xd0 mm/kmsan/kmsan.c:164
 __msan_memset+0x73/0xd0 mm/kmsan/kmsan_instr.c:461
 slab_alloc_node mm/slub.c:2717 [inline]
 slab_alloc mm/slub.c:2727 [inline]
 kmem_cache_alloc+0x5d8/0xb20 mm/slub.c:2732
 kmem_cache_zalloc include/linux/slab.h:697 [inline]
 taskstats_tgid_alloc kernel/taskstats.c:573 [inline]
 taskstats_exit+0x174/0x1760 kernel/taskstats.c:606
 do_exit+0xbf2/0x3890 kernel/exit.c:854
 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: 0033:0x457099
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:0000000000a3fda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000457099
RDX: 0000000000410c51 RSI: fffffffffffffff7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffff R09: 0000000000072db9
R10: 0000000000000140 R11: 0000000000000246 R12: 0000000000000006
R13: 0000000000072db9 R14: 0000000000000161 R15: badc0ffeebadface
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 6a40b5e060afca13 ]---
RIP: 0010:kmsan_get_shadow_address+0x2d6/0x3d0 mm/kmsan/kmsan.c:1112
Code: e9 89 00 00 00 c7 04 25 60 35 4f 8a 01 00 00 00 65 48 8b 04 25 80 fc 02 00 c6 80 f3 08 00 00 01 80 3c 25 78 35 4f 8a 00 74 0c <0f> 0b 0f 1f 84 00 00 00 00 00 eb fe 48 c7 c7 39 81 8a 89 31 c0 4c
RSP: 0018:ffff8801b730fb20 EFLAGS: 00010082
RAX: 000000000000001d RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: ffff8801b730fb50 R08: 0000000000000000 R09: ffff88021fc39250
R10: 0000000000000000 R11: ffffffff854248c0 R12: 0000000000000001
R13: ffff880100000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000001ff1940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d8b518db8 CR3: 0000000104728000 CR4: 00000000001406f0
DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600